ogQ CRUSTACEA. 



thick and inflated forms; yet, as in Xanthasia, they may have the de- 

 pressed back of a Hymenosoma. The fossae of the inner antennas are 

 generally coalescent, and the front very narrow ; but in the genus 

 Pinnotlierelia, the front is wide, and the union of it medially with the 

 epistome below, forms a rather wide separation between the anten- 

 naryfossettes. 



Genus PINNOTHERA. 

 PlNNOTIIERA OBESA. 



Carapax plus minusve transversus, interdum suborbicularis, obesiis, unci us, 

 niticlus. MaxUlipedes extend midi, artkido tertio transrersim insito, 

 marginibus oppositis extus convergentibus. Ocxdi purvuli. I\'dcs 

 nudi ; antici mediocres, manu tumidd supra fotundtttd, infra non 

 pubescente, digitls erassis, iidus pubrscej dibits, superiore crassiori : 

 pedes postici gracdlimi, tarso tenia, infra breviier jpubescente, arttculo 

 qidnto versus apicem vix pubescente. 



Carapax transverse elliptical, obese, naked, shining. Outer maxil- 

 lipeds naked, third joint placed transversely, the opposite margins 

 converging outward. Eyes cpiite small, and in female, not seen 

 from above. Feet naked, the anterior of moderate size, hand a 

 little compressed, rounded above, not pubescent below, fingers stout, 

 pubescent on the meeting surfaces; posterior legs very slender, 

 tarsus slender, short pubescence below ; a few hairs towards apex of 

 fifth joint. 



Plate 24, fig. 3 a, small male, enlarged three diameters; b, c, out- 

 lines of different females, natural size; d, under view of front of fig. a ; 

 e, outer maxillipeds of fig. b, enlarged; /, same, more enlarged ; g. 

 seta of same; 7i, male abdomen; i, hand, enlarged three diameters. 



Feejee Islands. 



Length of carapax of a female, four and three-fourths lines; breadth, 

 six and one-third lines. Of a male slightly broader than long, the 

 third joint of the fourth pair of legs is two and three-fourths lines 



