238 



Records of the Indian Museum. [Voi,. XXIV, 



Harpilius gerlachei Nobili. 



1905. Harpilius Gerlachei, Nobili, Bull. Mus. Paris XI, p. 160. 

 1907. Harpilius Gerlachei, Nobili, Bull. sci. France Belgiq.ue XL, 



p. 45, pi. iv, figs. 10, ion. 

 1915. Harpilius Gerlachei, Balss, Denk. math.-iiaturw. Kl. K. Akad- 



Wien XCI, p. 27. 

 1921. Harpilius gerlachei, Tattersall, Journ. Linn. Soc, Zool. 



XXXIY, p. 390, pi. vxviii, fig. 9. 



This species is readily distinguished from all other members 

 of the genus by the absence of the hepatic spine of the carapace. 

 It also differs from all, with the possible exception of H. conso- 

 brinus, in the absence of an arthrobranch on the third maxilliped. 

 The principal characters of the species are as follows : — 

 (i) The rostrum is rather shallow and bears from 3 to 5 

 teeth above, usually 4, and 1 below. The posterior dorsal tooth 

 is placed near the base of the rostrum in advance of the hinder 



Text-fig. 74. — Harpilius gerlachei Nobili. 

 Anterior part of carapace, rostrum, etc. 



limit of the orbit. The midrib of the rostrum is not continuous 

 with the orbital margin, but curves round the orbit in the form of 

 an ill-defined crest some distance behind the margin proper (text- 

 fig- 74)- 



(ii) The antennal spine is placed close to the lower orbital 

 angle and is not supported by a carina, The hepatic is absent. 

 The antero-lateral angles of the carapace are a little produced, but 

 rounded. 



(iii) The spine on the outer side of the second segment of 

 the antenna is short. The terminal spine of the antennal scale 

 projects well beyond the distal end of the lamella. 



(iv) The antepenultimate segment of the third maxilliped is 

 a little more than 3 times as long as broad. 



(v) The carpus of the first peraeopod is from 5 to 5" 5 times 

 as long as its" distal breadth and the fingers are little more than 

 half the length of the palm. 



(vi) In the second peraeopod (text-fig. 75) the ischium is 

 unarmed. The merus has no spine at the distal end of the upper 

 border ; the lower border ends acutely on the outer side and in a 

 rounded lobe or process on the inner side. The carpus is unarmed. 



