ASTACID^E. 53 



inferiore seriebus duabus spinularum. Lamella) caudalis intermedia) 

 pars 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. affinis. The " areola suturalis angus- 

 tissima, stria solum/' is a very striking character, suggesting more or 

 less agreement with C. ClarJrii, C. Wiegmanni, C. lancifer, C. obesus, C. 

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

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

 lancifer and C- Wiegmanni the rostrum differs. 



11. Cambaeus penicillatus LeConte. 



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



Figures on PI. I. and III. 



First abdominal legs of the male : 



first form, fig. 93 in front ; fig. 94 outside, 

 second form, fig. 95 in front ; 96 outside. 



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

 tennas, c. 



Mas. Eostro lato, longo, piano, lsevi, 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 internis articulo basali dente infero submar- 

 ginali ; lamina brevi, lata, apice fere truncata, margine externo inflato, 

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

 pedibus maxillaribus externis intus et subtus barbatis. Thorace cylin- 

 drico, compresso, punctato, 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 chelse a3qualibus, rectis, costatis, punctato-ciliatis, 

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

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

 majori ; subtus lseviori, spina antica media. Brachio lasvi, spinis ante- 

 apicalibus parvis ; subtus biseriatim spinoso. Pedibus tertiis et quartis 

 articulo tertio unguiculato ; pedibus quartis capitulo basali conico, 

 quintis spina basali obtusa. Pedibus abdominalibus rectis, brevibus, 

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



