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CAMBARUS. 3 
einen an das Ende des dussern Theils angeleeten und einen zweiten kiirze- 
ren frei nach vorn vorstehenden, 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 
myself, from specimens collected by Mr. 8. Garman 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 Zodlogy. In some of the second form males in 
the latter collection the chelz are smaller and comparatively smooth, as 
Saussure says was the case in some specimens of his C. consobrinus: “ Souvent 
les pattes de la premiere paire sont petites et presque sans caractéres, les 
doigts sans carénes, ponctués au lieu d’étre tuberculeux. (Ceci se voit sur- 
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 /hird 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- 
bensis, but different sexual appendages. 
C. Cubensis finds its nearest kin in C. Mezicanus. 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. consobrinus inhabits stagnant pools 
in Cuba. 
The Astacus fluviatilis major of Sloane’s Jamaica, Vol. Il. p. 271, Pl. 245, 
fig. 2, is a Paleimon, 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. 
