294 Carcinolog ical Fauna of India. 



external orbital spine is, not an angular lobe, but a sharp spine : 



(3) the spine on the lateral border behind the external orbital 

 spine is a mere spinule, and the carapace in front of a well defined 

 transverse line that connects these spines is covered with small squami- 

 form granules : 



(4) there is no spine on the ischium of the chelipeds ; the wrist 

 has its dorsal surface closely covered with somewhat scale-like granules; 

 the hand has its inner surface covered, but not nearly so closely, with 

 rather larger granules and has its outer edge sharply bicarinate : 



(5) the dactylus of the second and third pairs of true legs is 

 sickle-shaped : 



(6) the small last pair of legs are stouter.- 



In the Indian Museum collection are two specimens — a small 

 female from off Ceylon 28 fms., and a large female from off the Malabar 

 coast 45 fms. 



Lyreidus, DeHaan. 



Lyreidus, DeHaan, Faun. Japon. Crust, p. 138. 

 Lyreidus, Henderson, ' Challenger ' Anomnra, p. 33. 



Carapace elongate-obovate, the antero-lateral margins independent 

 and gradually convergent ; strongly convex from side to side and 

 slightly convex from before backwards ; smooth and polished, with the 

 regions undefined. Fronto-orbital border less than half the breadth of 

 the carapace. Eyes small ; eyestalks short, broad at base, orbits hardly 



oblique. 



Antennules about equal in size to the antennas : antennas with a 

 stoutish peduncle and rather short slender flagellum, the peduncle not 

 concealing the antennulary peduncle. 



Merus of the external maxillipeds a little longer than the ischium. 



Sternum broad as far as the bases of the first pair of true legs, 

 then becoming narrow. Last pair of legs abnormally short and slender, 

 arising well in advance of the posterior pair. The abdomen iu both 

 sexes consists of 7 distinct segments. 



112. Lyreidus channeri, Wood-Mason. 



Lyreidus channeri, Wood-Mason, P. A. S. B., August, 1885, p. 104, and J. A. 

 S. B., Vol. LVI. 1887, pt. 2, p. 206, pi. i. 



Lyreidus gracilis, Wood-Mason, J. A. S. B., Vol. LVI. 1887, pt. 2, p. 376. 



The greatest breadth of the carapace — considerably in rear of the 

 front — is a good deal more than half its greatest length, and is about 

 2| times the width of the fronto-orbital border. 



299 



