I9I4'] S. Kemp : Notes on Crustacea Dccapoda. 95 



The carpus of the second peraeopod is composed of six, less 

 commonly of seven, segments. It is described by Miss Rathbun 

 as " five annulate ", and six segments are distinct in the American 

 examples which I have examined. The two proximal articula- 

 tions are much less clearly marked than the remaining three, and 

 the fact that in one specimen (fig. 9) there is a further subdivi- 

 sion, making three short proximal segments, indicates that the 

 character is subject to some variation. In the normal 6-seg- 

 mented carpus the proportional lengths of the segments differ 

 somewhat from Miss Rathbun's description, but agree closely with 

 the account given by Nobili. Comparison of fig. 7, which repre- 

 sents the carpus and chela of a specimen from Florida, with 

 fig. 8, in which the same segments of a S. Indian individual are 

 shown, will indicate the almost exact similarity in segmenta- 

 tion. 



A feature of the species which seems to have escaped notice 

 hitherto is the great development of the third peraeopod in the 

 male. In the female (fig. 6) this limb is closely similar to 

 those of the two succeeding pairs, but in males, both from Florida 

 and from S. India, it is very much longer (fig. 10), reaching 

 beyond the apex of the antennal scale by the dactylus and about 

 one-half of the propodus. The propodus, moreover, is broadened 

 towards its ultimate end and the inferior margin is, for rather 

 more than its distal third, thickly beset with slender spines. The 

 dactylar spines of the limb are also far more numerous. 



As regards the spinulation of the merus in the last three pairs 

 of legs there is considerable variation. In one example (from 

 America) it bears five spines, in others two, three, or none at all. 

 The telson bears three pairs of dorsal spinules : in some specimens 

 four on one side and three on the other. The spinulation of the 

 apex of the telson agrees with Nobili 's description. 



The following specimens have been examined : — 



~"Y(f " Kilakarai, Ramnad Dist., S. Kemp. Seventeen, 7-12 nun. 



S. India, 

 ^^i Pamban, Ramnad Dist., S. Kemp. One, 12 mm. 



S. India. 

 -^"^^ Punta Rassa, Morid.i. .Smiths. Insl. I'ive, 10-14 mm. 



The specimens from Kilakarai and Pamban were found 

 among weeds in water only a few feet deep. They were caught in 

 February, 1913, and all, with the exception of two, are ovigerous 

 females. 



Thor paschalis has been recorded from Amboina (de Man), 

 the Red Sea (Heller, Nobili) and from Zanzibar (I^enz). In the 

 Atlantic it is known from the West Indies, the Bermudas, Florida, 

 Yucatan and neighbouring localities (Kingsley, Rathbun, Verrill). 



Genus Hippolyte, Leach. 



i860. I'irlii/is, .Stimp.son, Proc. .Acad. .Nat. Sci. [Philadelphia, p. ;;5. 



