1909.] N. AnnandaIvE : The Indian Cirvipedia Pedunculata. 71 



of the maxilla) one rather smaller bristle; the bristles internal to the excavation not 

 very long, of different sizes. Mandible with five teeth (including the inner angle) ; the 

 first tooth separated from the second by a space at least as great as that which separ- 

 ates the second from the internal margin of the maxilla ; second, third, fourth and fifth 

 teeth subequal ; the fifth directed outwards from the inner margin ; the base of the 

 second distinctly but minutely pectinated on the outer margin ; the third similarly but 

 less distinctly ornamented. 



lyarge specimens measure 9-10 mm. in length of capitulum. 



Habitat. — Off Akyab, Northern Burma: on Antipatharians growing in about 17 

 fathoms (S.S. ''Golden Crown," January 1909); off Orissa, Bengal: on Antipatha- 

 rians growing in 20 fathoms (S.S. " Golden Crown," February 1909). 



This form agrees in so many respects with Darwin's Oxynaspis celata ^ from 

 Madeira that I cannot regard it as a distinct species. There are certain differences, 

 however, which seem to justify its being considered a local race. I have therefore 

 called it ' ' subspecies indica." The chief points of difference between it and the typical 

 form are, judging from Darwin's description and figures : — (i) the basal arm of the 

 carina is much shorter than the vertical arm ; (2 ) the concavity of the inner surface 

 of the carina is greater ; (3) the margins of the scutum and tergum are more strongly 

 serrated; (4) the two rami of the second pair of cirri are subequal ; (5) all the cirri are 

 curved. It must be remembered, however, that Darwin says that all the specimens 

 he examined were in a bad state of preservation, and that, therefore, it is possible that 

 his descriptions of the soft parts would have differed in detail had he examined 

 fresh specimens. 



Subfamily LE PA DIN yE. 

 Key to the Genera. 



1. Valves covering practically the whole of the capitulum. 



(a) Lateral appendages not more than 6 . . . . Lepas. 



2. Valves reduced in size or absent, capitular membrane swollen. 



{a) Lateral appendages numbering 12 or 14; no anal append- 

 ages; at least three valves distinguishable . . Conchoderma. 



1 Dr. W. T. Caiman of the British Museum has been kind enough to examine some specimens of the 

 Indian form and to send me the following note : — " The types of Oxynaspis celata, or what I take to 

 be the types — they are from Madeira and labelled in Darwin's writing — are dried and include several 

 separated valves stuck on a card. I have cleaned the valves of one of your specimens to compare with 

 them. There are certain differences which may indicate that the species are distinct, although, without 

 a larger series and more careful study, I should hesitate to state that this is so. The most obvious 

 differences are that the scutum is more acutely produced above and the carina much wider and more 

 deeply cupped than in the Indian specimen. Also the margins of the valves are less strongly toothed 

 than in your specimen. Darwin's figures of the separated valves give a very accurate impression of the 

 type specimens and show the diiïerences I have mentioned from yours." — March yd, 1909. 



