i82 Memoirs of the Indian Museum. [Vol. IV, 



stouter than in that species ; the undivided basal part is as long as the median spine 

 thus agreeing with nefandus and differing from trispinosus and pulchellus. 



The form of the telson is somewhat different from that of any of the preceding 

 species. In shape it is more or less square, but the submedian lobes project distally 

 beyond the next pair, and so break the evenness of the posterior margin. The fissures 

 separating the lobes are well-marked, and the outermost on each side is specially broad 

 and deeply cut, widening distally. The dorsal bosses are higher than in the other 

 species, more particularly the median one, and the laterals are round (not oval) in shape- 



I have seen no examples of Gonodactylus tuber osus. The two known specimens 

 were obtained on the Macclesfield Bank, China Seas, 37 fathoms (Pocock). 



16. Gonodactylus glaber (Lenz). 



Plate X, fig. 121. 



1905. Protosquilla glabra, L,enz, Abhandl. Senck. naturf. Ges. Frankfürt, p. 388, pi. xlvii, fig. 13. 

 1910. Protosquilla glabra, I^enz, in Voeltzkow's Reise in Ost- Afrika, II, p. 572. 



The carapace is fully one and a half times as long as wide, and is slightly broader 

 behind than in front. The posterior margin is almost straight, and the anterior margins 

 on either side of the rostral base slope slightly backwards and are feebly concave. 

 The antero-lateral angles are rectangular in the small specimen, rather more acute in the 

 larger individual. The rostrum is sharply trispinous. The median spine is slender 

 and very long ; it reaches almost to or beyond the middle of the eyestalks, and is fully 

 twice as long as the undivided basal part. The lateral spines are only about half the 

 length of the median, stouter and curved forwards. 



The dorsal processes of the ophthalmic somite consist of a pair of plates which ex- 

 tend outwards almost to the external edge of the proximal part of the eyestalks ; their 

 anterior and postero-lateral margins are slightly convex and meet in a subacute point. 

 The eyestalks are two-fifths the length of the carapace in the larger example, longer in 

 the smaller individual ; they reach to the end of the second segment of the antennular 

 peduncle. The cornea is not noticeably wider than the stalk and is set obliquely on it. 

 The mandibular palp is composed of two segments. 



The dactylus of the raptorial claw is strongly swollen at the base and its external 

 margin is notched posteriorly ; the slender terminal part is curved inwards at the apex. 



The lateral margins of the sixth and seventh thoracic somites are truncate with 

 broadly rounded anterior and posterior angles. The first five abdominal somites are 

 smooth dorsally, but show obscure traces of pitting similar to that noticed in G. pulchellus. 

 Laterally there is a well-defined |_-shaped ridge on each somite except the first, running 

 parallel to the anterior and external edges. The fifth somite is obscurely furrowed 

 longitudinally on either side of the smooth median portion. The sixth somite bear six 

 eroded tubercles on its dorsal aspect, and the outermost of these, the longest and narrow- 

 est, meet the external margins in a blunt postero-lateral point. 



The telson is a trifle wider than long and appears to be immovably connected with 

 the preceding segment. Of the three mid-dorsal bosses the two outer ones are much 

 longer than in any of the preceding species ; they are pyrif orm in shape and terminate 



