192 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 42. 



The abdomen is composed of two segments, the first with three 

 suture lines on either side indicative of other partly coalesced seg- 

 ments. The second or terminal segment is produced to an extremity 

 which is somewhat truncate, with a slight emargination in the 

 middle. On the dorsal surface are two large, elevated tubercles, one 

 on either side of the median line. The uropoda do not extend 

 beyond the ap^x of the terminal segment of the abdomen; both 

 branches are similar in shape, posteriorly rounded, but 'the outer one 

 is shorter, extending only two-thirds the length of the inner branch. 



The legs are all alike, ambulatory. 



Only one specimen was collected by E. A. Andrews at Montego 

 Bay. It was dredged off the batliing beach. 



Type.— Ca.t. No. 43349, U.S.N.M. 



As the specimen was completely rolled up into a ball, it was impos- 

 sible to get at the pleopods without injuring it. 



DYNAMENE MOOREI Richardson. 



Dynamene perforata Moore (female), Bull. U. S. Fish Coram., vol. 20, pt. 2, 1900, 

 pp. 173-174, pi. 10, fig. 10. — Richardson (female). Trans. Conn. Acad. Sci., 

 vol. 11, 1902, pp. 291-292. 



DynameMe moorei Richardson, Bull. U. S. Nat. Mus., No. 54, 1905, p. 303. 



Locality. — Snug Harbor, Montego Bay^ about 17 specimens; 



found under girdle of chitons taken at tide line. (Collected by 



E. A. Andrews.) 



TERRESTRIAL ISOPODS. 



The following isopods were ^collected in Jamaica by Dr. Thomas 



Barbour. 



Family ONISCID^. 



PORCELLIO L.aEVIS Latreille. 



Porcellio Isevis Latreille, Hist. Nat. Crust, et Insectes, vol 7, 1804, p. 46; Genera 

 Crustaceorum et Insectorum, vol. 1, 1806, p. 71.— Leach, Edinb. Encycl., 

 vol. 7, 1813-14, p. 406; Trans. Linn. Soc. London, vol. 11, 1815, p. 375.— 

 Milne Edwards, Hist. Nat. Crust., vol 3, 1840, p. 169.— Budde-Lund, 

 Crust. Isop. Terrestria, 1885, pp. 138-141 (see Budde-Lund for further syn- 

 onymy) .—Richardson, Bull. U. S. Nat. Mus., No. 54, 1905, pp. 614-616. 



Locality. — Mandeville; about 75 specimens. 



PORCELLIONIDES PRUINOSUS (Brandt), 



Porcellio pruinosus Brandt, Bull. Soc. Imp. Naturalistes de Moscou, vol. 6, 

 1833, p. 19. 



Metoponorthus pruinosus Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 169-171 

 (see Budde-Lund for synonymy). — Dollfus, Bull. Soc. Zool. France, vol. 18, 

 1893, p. 187.— G. 0. Sars, Crust. Norway, vol. 2, 1899, pp. 184-185, pi. 80, 

 fig. 2.— Chilton, Trans. Linn. Soc. Lond. (2), vol. 8, 1901, p. 141.— Stoller, 

 54th Report New York State Mus., 1902, p. 213.— Paul^iier, Bull. New York 

 State Museum, 1905, pp. 183-184.— Richardson, Bull. U. S. Nat. Mus., 

 No. 54, 1905, pp. 627-629. 



Porcellionides pruinosus Stebbing, Records of the Indian Museum, vol. 6, pt. 4, 

 No. 12, 1911, p. 189. 



Locality. — Mandeville; about 75 specimens. 



