ASTACID.E. 53 



inferiore seriebus duabus spiimlarum. Lamella; caudalis intermedia' 

 pais anterior trispinosa. 



Long. corp. 2.3 inch ; antenn. 1.3 ; chelae, 0.5. 



Patria: Habitat cum priore (C. fossarum) in fossis Georgia; inferioris. 



The number of the hooked legs is not mentioned, and perhaps this 

 species belongs to the group of C. affirm. The "areola suturalis angus- 

 tissima. stria solum," is a very striking character, suggesting more or 

 less agreement with C. Clarkii, C. Wiegmanrd, C hncifer, C. obesits, C. 

 advena, and C. Carolinus. C. advena is otherwise described by LeConte ; 

 in C. Carolinus, C. obesus, and ('. Clarkii the hands are different ; in C. 

 lancifer and C. Wiegmanrd the rostrum differs. 



11. Cambaeus penicillatus LeConte. 



Astacus penicillatus LeConte, Proc. Aead. Philad., T. 7, p. 401. 



Figures on PI. I. and III. 



First abdominal legs of the male : 



first form, fig. 93 in front : fig. 04 outside. 

 second form, fig. 95 in front ; 9G outside. 



Antennal lamina, fig. 149, a ; epistome, b ; spine of the second joint of the exterior an- 

 tenna', c. 



Mas. Rostro lato, longo, piano, la>vi, apice subdeflexo, marginibus 

 ad acuminis brevis acuti apicem elevatis, convergentibus, antice subito 

 incurvis ; cretis vix elevatis. subparallelis, lineato-impressis, muticis. 

 Antennis modicis corpore brevioribus ; articulis basalibus duobus dente 

 parvo externo ; antennis intends articulo basali dente infero submar- 

 ginali : lamina brevi. lata, apice fere truncata. margine externo inflate 

 spina apicali acuta. Epistomate brevi, lato, antice obtuse-triangulari ; 

 pedibus maxillaribus externis intus et subtus barbatis. Thorace cylin- 

 drico, compresso, pimctato, lateribus granuloso ; linea modice profunda, 

 subsinuata. lateribus divisa, apice mutica ; areola punctata, modica, 

 postice valde dilatata. Postabdomine thoracis longitudine ac latitudine, 

 lateraliter compresso ; lamina media parte basali apice utrinque bi- 

 spina, parte apicali elliptica, vix breviori ; segmentis anteapicalibus 

 angulis externis posticis obtusis, rotundatis. Pedibus anticis modicis ; 

 chela, latiuscula, punctato-granulosa, margine interno recto, serrato, 

 longe barbato ; digitis chela- sequalibus, rectis. costatis, punctato-ciliatis, 

 intus spongiosis, digito mobili basi extus serrato. Carpo parcepunctato, 

 longiore, extus oblique truncato, margine interno serrato, spina media 

 majori ; subtus laeviori, spina antica media. Brachio la-vi. spinis ante- 

 apicalibus parvis ; subtus biseriatim spinoso. Pedilms tertiis et quartis 

 articulo tertio unguiculato ; pedibus quartis cajiitulo basali conieo, 

 quintis spina basali obtusa. Pedibus abdominalibus rectis, brevilms, 

 apice contortis, subtus medio excisis, apice fere coadunatis ; parte in- 



