510 CRUSTACEA. 



G-. 2. Callisea. — (Issea, Guerin; Callianisea, Edwards.) Forsan a Calliani- 

 ded nihil diflfert, teste Edwardsio (Crust., ii. 321). 



The name Issea was changed by Edwards, on account of its pre- 

 vious use, to Callianisea, which, as this so closely resembles Callia- 

 nassa and Callianidea, we would change again to Callisea. 



I. THALASSINIDEA EUBRANCHIATA.* 

 Family I. GEBID^l. 



Gebia pugettensis. 



Frons tridentatus, dente rnediano triangidatus, superficie supernd usque 

 ad suturam dor si transversam scabrd et liirsutd. Manus marginibus 

 pilosa, 7ion spinulosa nee dentata, superficie externa Icevis non costata, 

 linedque densh hirsutd longitudinaliter notata, digito inferior e denti- 

 formi, crasso, acuto, non incurvato, digito mobili elongato, inermi, 

 margine piloso. Pedes 2di infra longissime ciliati. Antennae external 

 quoad basin partim pilosw, flagellis paulo Mrsutis. Segmentum cau- 

 date transverswm, rectangulatum, integrum. 



Front tridentate, median tooth triangular, upper surface nearly to 

 dorsal suture scabrous and hirsute. Hand pilose at the margins, 

 but not spinulous nor dentate, outer surface smooth, not costate, 

 having a hirsute or lanose longitudinal line just below the middle; 

 tooth corresponding to lower finger stout, acutish, not incurved; 

 moveable finger elongate, unarmed, pilose at margins. Second pair 

 of feet having the lower side very long ciliate. Outer antennae 

 with the basal portion in part pilose, the flagellum somewhat hir- 

 sute. Caudal segment transverse rectangular, entire. 



* The following new species of Thalassinidea are described in brief by the author in 

 the Proceedings of the Academy of Nat. Sci. of Philadelphia, for January, 1852. 



