On the earthworms collected during the 'Skeat expedition' to the Malay peninsula, 1899-1900 / by Frank E. Beddard.
- Frank Evers Beddard
- Date:
- 1900
Licence: In copyright
Credit: On the earthworms collected during the 'Skeat expedition' to the Malay peninsula, 1899-1900 / by Frank E. Beddard. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
5/24 page 893
![to this species. 1 am able in a few small points to supplement Dr. Eosa’s account. I find, for example, that in both specimens there are more setae upon the clitellum than he found, i. e. 6 or so upon the last two segments. The figure given by Eosa {loc. cit, tav. i. fig. 14) of the very remarkable arrangement of the genital papillae entirely bears out and admirably illustrates the appearances detected by myself. This being so, I was surprised to find on opening one of the two specimens not a trace of the caeca which Eosa has very emphatically stated to be present. To make certain about this point, which is of some systematic importance, I dis- sected the second specimen, in which I also failed to find, these appendages. The gizzard of this worm is rather remarkable in shape ; it is wide from side and short in antero-posterior diameter; it is constricted in the middle, and presents somewhat the appearance of a doctor’s hat viewed, of course, fr<^ra the side. In other points, including size, mv specimen seems to agree with that described by Dr. Eosa. The spermathecae, however, happen to be more globular, no doubt a question of a different degree of distension with sperm, while the diverticula are a little less conspicuous in length than they are figured by Dr. Eosa. Hah. Biserat. (5) Amyntas malayanus, n. sp. (Fig. 1, p. 894.) Of this species I have been able to examine a number of examples. The individual selected for measurement was 144 mm. in length and consisted of 105 segments. The setce on the anterior segments show no differences in size from those of the posterior segments. They are present on all the segments of the clitellum. The clitellum occupies the usual segments, but it does not begin or end sharply. The genital papillce are highly characteristic. There are four pairs of these in all, v\hich lie upon the xviiith to the xxist segments. The first pair lie behind and to the inside of the male pores ; the remaining pairs are in line with them upon successive segments. The papillse, as shown in the accompanying figure (fig. 1), are small, considerably smaller than the male pores, to which, however, they have a general resemblance in appearance. They are slightly projecting and surrounded by a circular wrinkle of the integument. There are no papillae upon the anterior segments. The male pores are conspicuous and widely separated. Each is surrounded by several circular wrinkles of the integument. From the tip of each porophore, which is somewhat raised, protrudes a slight conical process, which can be regarded as a penis. As to internal structure it is noticeable that the septum separating segments viii./ix., which is so often absent in Amyntas, is present in A. malayanus though rather thin. The intestine begins in the xvith segment,and the cceca are present, [3]](https://iiif.wellcomecollection.org/image/b22406475_0007.jp2/full/800%2C/0/default.jpg)
