No. 15. — Some Cuban Crustacea. 



By Mary J. Rathbun. 



With notes on the Astacidae, by Walter Faxon, and a list of Isopoda, 

 by Harriet Richardson. 



During a trip to western Cuba last February and March, Dr. 

 Thomas Barbour obtained several species of Crustacea, including two 

 new shrimps living in caves. These are not only very distinct from 

 any previously recorded, but represent two widely different families. 

 One is a Palaemonetes, (Palaemonidae), living in fresh water and blind 

 like the two cave-dwelling species of the genus already known ; l the 

 other is one of the Hippolytidae, found in slightly brackish water, and 

 having well-developed ocular pigment. No member of this family 

 has heretofore been found in caves, or to my knowledge, in brackish 

 water. 



PALAEMONIDAE. 



Palaemonetes calcis, sp. nov. 

 Plate 1, figs. 1-5. 



Type. — M. C. Z., 7,415. Cuba: Pool in a cave between Madruga 

 and Aguacate. Thomas Barbour. 



Body stout; carapace as long as the last 4 segments of the abdo- 

 men, high and thick; the median carina begins at the cervical suture, 

 is subacute, and bears a single sharp spine a little behind the line 

 of the orbits; the rostrum is about § as long as the remainder of the 

 carapace, inclined slightly downward, upper and lower edges thin, 

 unarmed, gradually converging to an acuminate tip, a few scattered 



1 Palaemonetes antrorum Benedict. Proc. L T . S. nat. mils., Apr. 14, 1896, 18, p. 615; 

 from artesian well 188 feet deep, San Marcos, Texas. 



Palaemonetes eigenmanni Hay, Proc. U. S. nat. mils., Feb. 2, 1903, 26, p. 431, text 

 fig. 2; from cavern at Ashton, Cuba. 



