Indian Deep-sea Dredging. 271 



men and only 4 millim. in the smallest, it is presumable to 

 infer that the specimens are not adults. 



The living animal is of a pale lilac colour. 



Bathynomus was first obtained by the l Blake ' in 955 brasses 

 north of Tortuq-as Reef in the Gulf of Mexico. 



Order STOMATOPODA. 



Squilla, auctorum. 



51. Squilla tenuispiniSj sp. n., Wood-Mason. 



Carapace small, with the antero-lateral angles produced 

 suddenly to a small sharp spine, which does not project beyond 

 the middle of the anterior margin, with its three carinas evan- 

 escent at both ends in the precervical part and at the ante- 

 rior end only in the postcervical part, and with the postero- 

 lateral angles rounded. Rostrum semioval, about as long as 

 broad, with a faint median longitudinal ridge on its distal 

 half, but without raised rims, covering only the middle of the 

 base of the antennulary somite, which is produced at each of 

 its antero-lateral angles into a sharp spine a trifle longer 

 than the antero-lateral spines of the carapace. Eyes asym- 

 metrical in themselves, rather small, the greatest width of 

 their conjoined lobes little exceeding the length of the rostrum. 



Tergum of fifth thoracic somite curved forwards at its outer 

 ends, which are terminated by a small spine ; terga of the sixth 

 and seventh triangularly produced and terminated by a small 

 spine postero- laterally. First to fifth abdominal terga provided 

 with eight carinas, two submedian, two sublateral, two lateral, 

 and two marginal, all the marginal, all the lateral except the 

 first, and all the sublateral except the first and second ending 

 posteriorly in a small spine ; sixth tergum furnished with six 

 coarser carinas, two submedian, two lateral, and two marginal, 

 all terminating in larger spines than those of the preceding- 

 somites, especially the marginal, which are prolonged into an 

 acuminate spine nearly as long, but not nearly as stout, as the 

 marginal and submedian spines of the telson. Telson trans- 

 verse, furnished above with a strong, median, roof-shaped 

 carina terminating posteriorly in a long and fine spine, which 

 projects for some distance into the median notch of the hinder 

 margin, and on the margin with six long and acuminate 

 spines in three pairs, of which the submedian enclose an acute 

 angle and have their inner edges for about half their length 

 from the base minutely spinulose ; the lateral are the longest 

 and separated from the submedian by ten spinules (of which 



19* 



