CRUSTACEA. 

 108 



Family PERICEBID^. 



Subfamily PERICERINiE. 



Pericera trigona. 



Yemmx—Carapax bene triangidatm, trianguh equilateral!, yinA po*. 

 tero-lateraUlongd,emssd,compM^ 



dmmdmhqm villosd, vtilis defrictls vera mMZ porcelland ; spims <l„r- 

 salibus ambus, mid mediand, edterd cardiaed; rostra medwcm, oorrn* 

 bus dwergentibus; spind prewrUtaU perbrem, suUcutd. Begw pft n/- 

 gostomiana uni-spinosa. Articulus pedum Mm minuti tuberculoma 

 et apice plerumque spinoso-prodmtus ; mauu tenia, digitis omnim 

 contiguis. 



female:— Equilate rally triangular, postero-latcral spine long, very 

 stout, flattened; upper and under surface dense and short villous, 

 on removing the villous coat, shining porcelainous ; back with two 

 median spines of moderate size, one to the medial region, one to the 

 cardiac; beak of moderate length; horns divergent. Pncorbital 

 spine very short, subacute. Pterygostomian region with a single 

 tooth. Third joint of feet minutely tuberculous, and the apex for 

 the most part prolonged and subacute; hand slender, finger and 

 thumb in contact within. 



Plate 3, fig. 4 a, animal (female), natural size; b, under view of 

 head ; c, female abdomen, enlarged two diameters ; d, hand of female, 

 ditto. 



Feejee Islands. 



Length from tip of beak to posterior apex, one and one-fourth 

 inches; breadth across from tip to tip of lateral spines, one and one- 

 fourth inches; breadth across the eyes, half an inch; distance between 

 tips of beak, one-sixth of an inch; distance between stomach and car- 

 diac dorsal spines, four lines; and the same between the cardiac spine 

 and the posterior apex. 



