LEPTOSTRACA, SCHIZOPODA AND STOMATOPODA. 175 



tubercle is bounded laterally and posteriorly by a deep furrow. The whole surface of 

 the telson is thickly beset with spines similar to those on the sixth abdominal 

 segment. The spines on the lateral portions of the telson external to the tubercles 

 are arranged in three rows. 



The uropods have the outer spine of the basal prolongation much broader and 

 longer than the inner, and reaching to the top of the telson. The basal joint of the 

 exopodite bears nine or ten stout spines on its outer edge. Its paddle is rather 

 small. 



Length of the largest male 27 millims., of the largest female 31 millims. 



The colour of preserved specimens is generally dark, with various mottlings, the 

 tubercles of the sixth abdominal segment and the telson tinged distinctly red. 



This Protosijuilla approaches most nearly to P. brooksii, de Man, and P. hystrix, 

 Nobili. The former may be distinguished from P. spinosissima (1) by having the 

 four tubercles on the sixth abdominal segment quite smooth ; (2) by the much fewer 

 and much shorter spines on the telson and the sixth abdominal segment ; (3) by the 

 cleft in the lateral apical portions of the telson being nearly obsolete. 



P. hystrix differs from the present species (l) in the absence of tubercles from the 

 sixth abdominal segment ; (2) in the form of the spines arming the sixth abdominal 

 segment and the telson, which are shorter and stouter than in P. spinosissima, and 

 hooked at the tip instead of simple. 



Distribution : The type and only previously known specimen of P. spinosissima 

 was taken at Zanzibar, West Coast of Africa. The species would appear to be by no 

 means rare in Ceylon. 



STOMATOPOD LARVAE. 



Belonging to the gencts Squilla, Fabricius. 



Alima a. Plate II., figs. 20 to 25. 

 Localities : 



South end of Tied Sea, surface tow-net. Thirteen, 11 to 23 millims. 



Off Rameswaram Island, surface tow-net. Seven, 4*5 to 7 millims. 



Palk Bay, trawl. Eighteen, 12 to 27 millims. 



Off Mutwal Island, surface tow-net. One, 27 millims. 



All the above Alinue appear to belong to one species. It will be most convenient 

 to describe the largest specimen first, and then add a note on the small specimens. 



Larva 27 millims. 



Body generally greatly elongate and narrow ; rostrum fairly short, about one-third 

 of the length from the anterolaterals to the posterior margin of the carapace ; 

 antero-laterals short, not extending to the eye-stalk ; postero-laterals rather long, 

 leaching to the junction of the second and third abdominal segment, a single 

 secondary spine near to its base ; postero-median dorsal spine short ; about sixteen 

 small denticles on the lower (ventral) in-turned edge of the carapace ; the latter with 



