A new trematode of the genus Lechriorchis from the dark green snake (Zamenis gemonensis) / by Marie V. Lebour.

  • Lebour, Marie Victoria, 1876-1971.
Date:
1913
Catalogue details

Licence: In copyright

Credit: A new trematode of the genus Lechriorchis from the dark green snake (Zamenis gemonensis) / by Marie V. Lebour. 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.

    6/8 (page 936)
    The cap is not very conspicuous until the egg is 0]ien. The eggs (fig. 2) measure ’OfiS mm.-'036 mm. x '021 mm. — -023 mm. The vitellaria are variable in length, but never reach beyond an ex- tremely short distance in front of the ventral sucker, 0‘02 mm. is quite the furthest they ever reach and usually it is not so much. Posteriorly they reach to about the middle of the testes, but are extremely variable in this region, and the left may reach to behind the left testes and the right hardly reach to the anterior portion of the right, or both may I'each to the level of the middle of the testes. The vitellarian follicles are in small groups Ijdng laterally to the outside of the intestinal cieca ; small ducts from them unite in a tiansverse duct each side lying just behind the ovary, and these unite in a small reservoir in the centre of the body which gives off the vitellarian duct to the oviduct. Lechriorchis validus Nicoll is imdoubtedly the most nearly related to the present species. L. inermis differs from it chiefly in its much smaller eggs and position of the vitellaria. The position of the testes (right in front of left instead of the reverse) and of the vesicula seminalis being rather more variable, do not seem to be such important specific characters. References, Nicoll, W. (1911).—On Three New Trematodes from Reptiles. Proceedings of the Zoological Society of London, pp. 677- 681. Stafford, J. (1905).—Trematodes from Canadian Vertebrates. Zoologischer Anzeiger, xxviii. p. 691. EXPLANATION OP PLATE XCIII. Lechriorchis inermis, sp. n. The following letters appfy to all the figures. C.S. Ciri'us.sac. E.P. Excretory pore. E.V. Excretoiy vesicle. G.P. Genital pore. I. Intestine. 0. Ovary. lES. Qisophagus. O.S. Oral sucker. PH. Pharynx. P.PH. Prepharynx. E.S.U. Receptaculuni seniinis uterinum. S.GL. Shell-glaiul. T. Testis. U. Uterus. V. Vitellaria. VG. Vagina. V.S. Ventral sucker. V.SEM. Vesicula seminalis. Fig. 1. Ventral view. Length 5'4 mm. 2. Eggs, length '033 mm. 3. Transverse section through unpaired portion of excretory vesicle and testes, showing intestinal caeca irregularly placed. 4. Transverse section through ventral sucker.