ASTACIDvE. 11 



Astacus lenmsculus is described, p. 524, and figured, pi. 33, fig. 1. I 

 have never seen this species. Astacus Bartonii, locality uncertain, pos- 

 sibly from Brazil, is described, p. 525, and figured, pi. 33, fig. 2. The 

 figure differs from all C. Bartonii which I have seen, even from the 

 types communicated by Professor Stimpson and Professor Leidy. The 

 rostrum, the antenna! lamina, the areola, and the hand are so different in 

 shape that evidently there must be a mistake. The patria, " possibly 

 from Brazil," is another stumbling-block. In the Museum of the Phila- 

 delphia Academy are two Astaci labelled Potamobius spec. West Indies, 

 and one labelled Bahia. But all three are undoubtedly the European 

 Astacus fluviatilis. Perhaps the labels have been changed. Another 

 small specimen, labelled Brazil, agrees in the shape of the rostrum with 

 the figure given by Dana, but this curious species is neither an Astacus 

 nor a Cambarus, but perhaps a Cheraps. It is a male, without the first 

 pair of abdominal legs. AstacidaB must be very rare in Brazil, as it was 

 impossible for Professor Agassiz and the members of the Thayer Expe- 

 dition to obtain any specimen, or even to ascertain the existence of any 

 Astacus species, in the vast country investigated by them. It must be 

 remarked that Erichson has never seen the Astacus Chilensis mentioned 

 by him; perhaps it is not a Cambams at all. 



1857. Professor W. Stimpson, in " The Crustacea and Echinodermata 

 of the Pacific Shores of North America," Journ. Boston Soc. N. H., VI. 

 (and separate, Cambridge, 1857-58, p. 93, pi. 6), gives detailed de- 

 scriptions of three new species, — A. nigrescens, from San Francisco ; 

 A. Troivbridgii, from Astoria, and A. Ktamathensis, from the Klamath 

 Lake. Also shorter notices of A. Gambelii, A. Icniusculus, and A. Ore- 

 ganus. He has kindly communicated to me the types of the new 

 species. They are apparently a very valuable addition to the North 

 American fauna, as is also the negative fact that as yet not a single 

 species of Cambarus has been found in the States of the Pacific shores. 



1866. Spence C. Bate, in " Vancouver Island Crabs," in the Natural- 

 ist in Vancouver's Island and British Columbia, by J. Keast Lord, Lon- 

 don, II. 278, says that A. Klamathensis is to be found in all streams 

 east of the Cascades. 



1864. Mr. H. Lucas has given a Note on Astacus pettucidus, which I 

 have not seen, in the Bullet. Soc. Entom. Paris, p. iv. 



1857. Mr. H. de Saussure, in Geneva, describes in his "Note carcino- 

 logique zur la famille des Thalassides et sur celle des Astacicles," Kev. et 

 Magas. de Zoologie, IX. pp. 99 - 102 et 503, three new species of Cam- 

 barus from America, C consobrinus from Cuba, C. Montczumcc and 0. 

 Aztccus, both from Mexico. , The descriptions are too short for a cer- 

 tain judgment, especially as I have not seen any species from Cuba, and 

 but one female from Mexico. It is impossible, from the descriptions 

 alone, to separate C. consobrinus from C. Cubensis, and the two other 

 species from C. Mexicanas. 



