CAMBARUS. 53 



ciiu-n an das Ende des aussern Thcils angelegten und einen zweitcn kiirze- 

 ren frci nach vorn vorstehcnden, mehr abgerundeten." 



It is exceedingly difficult to elucidate the complex structure of these 

 appendages without the aid of figures; but I think there is no doubt that 

 Von Martens's description appertains to the species described above by 

 invself, from specimens collected by Mr. S. Carman near Havana. 



Saussure's types of C. consobrinus, also in the Berlin Museum, were ex- 

 amined by Hagen in 1870, and by Von Martens. They consist of two dry 

 female specimens. The acumen of the rostrum is longer than in Erichson's 

 species, and it would seem from Saussure's figure that the lateral spines are 

 more prominent. Saussure mentions a small lateral spine, sometimes obso- 

 lete, on the carapace, which does not appear in any of the specimens in the 

 Museum of Comparative Zoology. In some of the second form males in 

 the latter collection the chelre are smaller and comparatively smooth, as 

 Saussure sa}-s was the case in some specimens of his C. consobrinus: " Souvent 

 les pattes de la premiere paire sont petites et presque sans caracteres, les 

 doigts sans carenes, ponctues au lieu d'etre tuberculeux. (Ceci se voit snr- 

 tout chez les males.)" The statement of Saussure, that the second joint of 

 the third pair of legs is hooked, is undoubtedly an error for third joint. As 

 the male abdominal appendages are not described by Saussure, it is doubtful 

 whether his species be the same as Erichson's. According to Von Martens, 

 specimens in the Berlin Museum make it probable that a second species of 

 Cambarus inhabits the island of Cuba, a species with a rostrum like C. Cu- 

 /ii'iix/x, but different sexual appendages. 



C. Cnbcnsis finds its nearest kin in C. Me.ricanus. It is distinguished from 

 that species by its wider areola and toothed rostrum. The male appendages 

 are similar in form, but the inner part is broader, forming a large oval plate. 

 The specimens obtained by Mr. Garman were found in creeks in a little town 

 opposite Havana. According to Saussure, C. consolrituix inhabits stagnant pools 

 in Cuba. 



The Astacus j//ir/,///7i* mnjnr of Sloane's Jamaica, Vol. II. p. 271, PI. 245, 

 fig. 2, is a Palaemon, and it is probable that the "common crawfish" of the 

 same author is also a fresh-water prawn. I have seen a specimen of C. affinis 

 in the Philadelphia Academy's collection, labelled, " Santo Domingo, W. M. 

 Gabb," but no doubt the locality is erroneous. The only authentic West 

 Indian Cambari are those found in the island of Cuba. 



