Indian Deep-sea Dredging. 

 Pkntaciieles, Sponce Bate. 



L>;;i 



The Indian species of this genus have for tlie most part 

 tlie typical peculiarities of shajjc, spinature, setosity, &c., and 

 1 have not therefore mentioned these in the specific descrip- 

 tions. The species, seven in number, fall into two groups, 

 the one characterized, like P. obscui'a, Spence Bate, by 

 liaving the caraj)ace uniformly spiny or granular or carious 

 and thickly furry, and the abdominal terga and pleurte often 

 granular or spicular ; the other, like P. Itvvis, Spence Bate, 

 liaving the carapace, except for certain definitely placed large 

 sj)ines, almost or quite smooth, and the abdominal terga and 

 pleurae also quite smooth as to the surface. 



In all of our sjiecies in wliicii both males and females have 

 been examined the olfactory tiagellum of the autennules is 

 stouter and much longer in the male. The telsonof all these 

 species appears quite plainly to be made up by the con- 

 crescence of a somite and its appendages. This is apparent 

 on either aspect, but is more plainly manifest on the dorsal 

 aspect, where the anterior fourth or so is seen to represent a 

 tergum carinated like all the other terga, the rest of the telson 

 being formed by the fully extended and adducted appendages. 



Sixth somite and telson of Tcnfacheles Ile.vtii. 



A tapering groove which traverses the telson in the middle 

 line appears to represent the line of concrescence of the ap- 

 pendages of opposite sides ; and on either side of this two 

 longitudinal slightly convergent crests appear to represent the 

 lines along which in each appendage the exopodite has fused 

 with the endopodite. 



