NINE SPECIES OF SQUILLID.^. 5 



The first to the fifth abdominal terga each bear nine carinse, namely one dorsal, 

 two submedian, two sublateral, two lateral, and two marginal, of which all the 

 marginal, the second to fifth of the lateral, the fifth of the sublateral, and the fifth 

 of the submedians terminate in a spine. 



The sixth abdominal tergum bears the visual six pairs of spiny ridges. 



The telson, though at first sight very different in appearance from that of any 

 of the preceding, is really built upon the same plan. On each side of the median 

 carina is a line of impressed marks, the two lines converging posteriorly. The 

 ridge of each submedian tooth is produced forwards upon the disk of the telson 

 about to the level of the notch in the median carina, and is distinctly wavy in its 

 anterior half. External to the long ridge thus formed, on each side, is a series of 

 three or four short curved radiating ridges, and in front of these, in the antero- 

 lateral angle, the surface is marked with a few scattered punctuations. There are 

 three or four denticles, divided by a notch into two groups, between the submedian 

 and sublateral spines on each side, in a concave line ; a marginal tooth is represented 

 by a distinct notch. 



The under surface presents very faint traces of the original punctate and im- 

 pressed sculpture, and none, except it be a convex elevation, of the postanal crest. 



No. ^. A male from Bombay, the type of the species, presented by Dr. F. 

 Stoliczka. 



Squilla 8TKIDULANS, n. sp., Wood-Mason. 

 Plate II. fig. 8, and Plate III. fig. 1. 



Squilla stridulans, Wood-Mason, n. sp., AJcock, Ann. Mag. Nat. Hist., May 1894, p. 410. 



Dorsal integument foveolate-rugose, the sculpture coarser on the median lobe 

 of the carapace and between the sublateral carina? of the free thoracic and abdo- 

 minal terga than at the sides. Rostrum oblong, with slightly convergent concave 

 and upturned sides, rounded antero-lateral angles, and concave or straight or slightly 

 arched anterior margin, without longitudinal ridge, but with a slightly rounded 

 elevation in the middle. 



Eyes large, asymmetrical in themselves, both lobes being greatly produced, 

 the major diameter of their cornete contained two and a half times in the antennal 

 scale. 



Processes of antennulary ring curved, sharp, submucronate-triangular. 



Anterior end of ventral arc of optic ring weakly arched, with a small subacute 

 tooth at each antero-lateral angle, ventrally convex posteriorly, the nauplius eye 

 persistent on the anterior slope of the convexity. 



