510 CRUSTACEA. 



G. 2. CALLISEA. (Issea, Guir-in; Callianisea,. Edwards.) Forsan a Cattiani- 

 deu nihil differt, teste Edwardsio (Crust., ii. 321). 



The name Isaea 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^. 



GEBIA PUGETTENSIS. 



Frcms tridentatus, dente mediano triangulatus, superfide svperna usque 

 ad suturam dorsi transversam scabrd et hirsutd. Manus marginibus 

 pilosa, non spinulosa nee dentata, superficie externd Icevis non coslata, 

 linedque dense hirsutd longitudinaliter notata, digito infer lore denti- 

 formi, crasso, acuto, nan incurvato, digito mobili elongate, inermi, 

 margine piloso. Pkdes 2di infra longissime ciliati. Antennae externce 

 quoad basin partim pilosas, flagellis paulo hirsutis. Segmentum cau- 

 dale transversum, 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 antennas 

 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. 



