RATHBUX: SOME CUBAN CRUSTACEA. 453 



sal surface flattened, forming an angle with the lateral surfaces, two 

 dorsal spines on each side near together, just posterior to the middle, 

 posterior margin broadly rounded, armed with 4 pairs of spines, of 

 which the 3 inner pairs are subequal in length, the first and second 

 pairs very weak, the third pair much the strongest, the outer pair 

 very small; both branches of swimming-fan broad, suboval, the outer 

 exceeding the inner branch, as much as the inner does thetelson; tooth 

 of outer branch broadly triangular, tipped with a small spine. 



Dimensions. — Type -9, total length 36.8 mm. (approx. ). Length 

 of carapace 14.8 mm., of abdomen 22 mm. (approx.). 



Color.— Whitish. 



Dr. Barbour says of this species: — 



" These shrimps were collected from a pool at the bottom of a deep, 

 steeply sloping, lime tone cave, situated directly beside the calzada 

 which runs from Madruga to Aguacate, just about a kilometer beyond 

 where this calzada branches off rom the one from Madruga to Matan- 

 zas. They were found in company with the blind isopod, Cirolana 

 cubensis Hay. The shrimps were quite abundant and were usually 

 seen swimming slowly about in the water a some distance from the 

 bottom. I caught several individuals on the first trip, but the bottle 

 got broken and I had to return for more. On the second visit I 

 found them much more abundant and obtained the whole lot by wad- 

 ing or swimming about in the water holding a small electric light and 

 dip net. Finally the water became so stirred up that it was impossible 

 to see anything. I saw no blind fish in this cave. I had kindly 

 helping me on this trip Dr. J. L. Bremer and Mr. Elliot C. Bacon." 



This species is very distinct from the other cave-dwelling Palaemo- 

 netes. It approaches nearest to P. eigenmanni Hay which has 

 similar eyes but a more slender body, much longer rostrum, armed 

 above with a series of teeth, and more slender chelae. 



Palaemonetes eigenmanni Hay. 



Palaemonetes eigenmanni Hay, Proc. U. S. nat. mus., Feb. 2, 1903, 

 26, p. 431-433, fig. 2. 



Type locality : — Cave at Ashton, southwest of Alquizar, Province 

 of Habana. 



Cave near Giiira de Melena, Habana Province; Dr. Pedro Perdigon, 

 collector; presented by Dr. Carlos de la Torre; 4 specimens. M. C. Z., 

 7,427. 



The largest specimen that Mr. Hay described was 23 mm. long. 



