On the crustacea collected during the 'Skeat expedition' to the Malay peninsula. Pt. II. Anomura, Cirripedia, and Isopoda / by W.F. Lanchester.
- Lanchester, William Foster.
- Date:
- 1902
Licence: In copyright
Credit: On the crustacea collected during the 'Skeat expedition' to the Malay peninsula. Pt. II. Anomura, Cirripedia, and Isopoda / by W.F. Lanchester. 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.
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![longish, stiff hairs, the apex with the usual bundle of short bristles. This species, which Mr. F. F. Laidlaw kindly brought to my notice on an Enhydris which he was examining, is possibly identical with one of which Darwin had only a single young and imperfect specimen, taken off Borneo, from the skin of a sea- snake. It agrees in the presence of the “two or three very distinct ridges on each side of the midrib ” internally; but I have been unable to satisfy myself, in these small specimens, of the existence of any pores in the parietes, so that an identification with Darwin’s form must remain a matter of doubt. It is clearly marked off from the other two species described by Darwin—(a) from P. bissexlobata by the subequality of the rami of the 1st cirrus, and (b) from P. decorata by the very moderate convexity of the basis. Moreover, to judge from Darwin’s figures, the shell and opercular valves would seem to be consider- ably thinner in our species. XIII. Genus Ibla Leach. 26. Ibla quahrivalvis Cuvier. Anatifa qucidrivalvis Cuv. Mem. pour servir . . . Mollusq. figs. 15-16 (1817). Ibla quadrivalvis Darwin, ‘ Lepadidse,’ p. 203, pi. iv. fig. 9 (1851). Loc. Pulau Bidan, Penang. Numerous specimens. XIY. Genus Lepas Linn. 27. Lepas anserifera Linn. Leyas anserif'era Linn. Syst. Nat. (1767); Darwin, ‘ Lepadidse,’ p. 81, pi. i. fig. 4 (1851). Loc. Patani. Two specimens. XY. Genus Dichelaspis Gray. The following key to the species of this genus is partly based on that given by Hoek in the Report on the Cirripedia col- lected by the ‘ Challenger,’ and amplified by Stebbing in the ‘Annals and Magazine of Natural History,’ (6) xv. p. 21 (1895); but I have modified it somewhat in Group B, owing to the relatively larger number, namely eight, of new species which now have to be included in that group. A. Carina terminating in a disk. Basal segment of scutum narrower than occludent. Tergum axe-shaped. Edge crenate D. grayii Darwin. Edge smooth D. yellucida Darwin. Basal segment twice as broad as occludent D. warwickii Darwin. Basal segment thrice as broad as occludent. Tergum narrowing anteriorly ID. antigure Stebbing. Tergum widening anteriorly D. koeJci Stebbing. [10] ‘](https://iiif.wellcomecollection.org/image/b22406554_0014.jp2/full/800%2C/0/default.jpg)
