54 A REVISION OF THE ASTACID.E. 



19. Cambarus ad vena. 



Antaeus adeem, Le Conte, Proc. Acad. Nat. Sci. Pkila., VII. 402, 1S55. 



s Carolinus, Hagen, 111. Cat. Mus. Coinp. Zool., No. III. p. 87, PI. I. figs. 51-54, PI. III. fig. 165, 



1870. 

 Cambarus advena, Hagen, 111. Cat. Mus. Comp. Zool., No. III., PI. III. fig. 164, PI. VII., 1870. 

 Cambarus adveaa, Faxon, Proc. Amer. Acad. Arts aud Sci., XX. 140, 1884. 



There is a female type specimen of Le Conte's Astacus advena in the 

 Museum of Comparative Zoology, and another, also a female, in the col- 

 lection of the Academy of Natural Sciences of Philadelphia. By some error 

 Dr. Hagen transposed the descriptions of C. advena and C. GaroUnus in his 

 Monograph, so that his descriptions do not agree with his own types of these 

 species in the Museum of Comparative Zoology! He gives, under the name 

 of G. advena, a full figure of Le Conte's species on Plate VII., and the anten- 

 nal scale, spine of the second segment of the antenna, and epistoma (from 

 Le Conte's type in the Philadelphia Academy) on Plate III. fig. 164. The 

 male appendages, antennal scale, and epistoma are figured on Plate I. figs. 

 51-54, Plate III. fig. 165, as C. GaroUnus. 



" Habitat in Georgia inferiore. Hyeme vitam degit subterraneam. ^Estate 

 in fossis invenitur." (Le Conte.) 



The type of Le Conte in the Museum of Comparative Zoology has a spine 

 on the lower side of the first segment of the antennules, as in C. GaroUnus. 



20. Cambarus Carolinus. 



P dstacus (Cambarus) Carolinus, Erichson, Arch. Naturgesch., XII. Jahrg., I. 96, 1846. 

 Cambarus advena, Bagen, 111. Cat. Mus. Comp. Zool., No. III. p. 86, PI. I. figs. 90-92, 1S70. 

 Cambarus Carolinus, 11 ua.x (as determined by examination of his type specimen !). 

 Cambarus Carolinus, Faxon, Proc. Amer. Acad. Arts and Sci., XX. 140, lJvsj. 



For the transposition of the descriptions and part of the figures of G. Caro- 

 linus and G. advena in Hagen's Monograph, see above. Hagen's types of 

 these two species in the Museum of Comparative Zoology are correctly de- 

 termined. The larger dimensions given by Hagen (p. 86), 2.9 in., are those 

 given by !>«■ Conte lor Astacus advena. 



Hagen's type, labelled "Cambarus GaroUnus Er.," and described by him 

 (p. 86) as •Cambarus advena LeC, is a male of tin' first form ( M. C. Z., No. 

 232) from Charleston, S. C. It. differs from Astacus advena LeC. as follows. 

 The rostrum is less triangular and less dellexed. the cephalothor&X more 



