378 ME. J. E. HEXDEESON— A CONTEIBrTIOX 



The largest specimen is a female with a Bopyiid in its right hranchial chamher ; 

 it measures 17 mm. in length and 20 mm. in breadth, including the lateral spines. 



G. rostratu7n is also closely allied to G. variegatmn, of "which it may possibly prove to 

 be a variety. The only important difference lies in the character of the front, and I 

 have observed specimens of the latter species in which the median projections were more 

 prominent than the others. 



Distribution. Mouth of the Ganges {A. Milne- Edwards). 



Genus LrPOCXCLUS, Adams & White. 



120. LuPOCYCLUS iN^QUALis (Walker). 



Goniosoiua iruequale, Walker, Jouni. Linn. Soc, Zool. vol. xx. p. 110, pi. viii. fig. 1 (1887). 



Gulf of Martaban, a male and a female (Oates). 



The carapace is armed with nine lateral spines, of which the fourth, sixth, and 

 eighth are rudimentary, especially the eighth, which is very minute, and the second is 

 smaller than the third, i. rotvndatvs, Adams & White, has five lateral teeth, with a 

 single minute one alternating in each interspace, but the carapace is more convex, pro- 

 portionately narrower, and with a more prominent front. I am unable to say how 

 Z. pMlippinensis, Nauck, differs, as this species has only been very shortly and imper- 

 fectly characterized. 



I think there can be little doul)t that the above specimens are referable to Walker's 

 species ; at the same time, it ought to be placed in the genus Lupocyclus, on account of 

 its general form, its peculiar front, and the basal autennal joint freely movable in the 

 orbital hiatus. 



The larger specimen, a female, is 12 mm. long and 15 mm. wide. 



Distrihution. Singapore {Walker). 



Genus Lissocakcinus, Adams & White. 



121. Lissocakcinus polybioides, Adams & White. 



L. jwlybioides, Adams & White, ' Samarang ' Crust, p. 46, pi. xi. fig. 5 (1848). 



Gulf of Martaban, a female (Oates). 



This species is distinguished from L. Icevis, Miers, by its flatter carapace, more 

 promment front, the lateral teeth, which gradually diminish in size on passing backwards, 

 and a line runs in from the last lateral tooth on to the surface of the branchial region. 



The carapace is 7' 2 mm. long and 7 mm. broad. 



BistriUdion. Bovneo {Adams 8f White); Cejlon {Miers) ; Fovt Jackson {Hasioell). 



122. Lissocakcinus l^vis, Miers. 



L. ItBvis, Miers, 'Challenger' Bracliyura, p. 205, pi. xvii. fig. 3 (1886). 



Tuticorin, a female with ova {Thurston) ; Gulf of Martaban, a single young specimen 



{Oate.^). 



In this species the front is broad and not specially prominent. The first and fifth 



