110 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



Vol. 37. 



two preceding, being 2^ mm. long. The second antennae are broken 

 at the fourth article. The maxilliped has a palp of five articles. 



The first segment of the thorax is not wider than the head, and 

 has the antero-lateral angles produced, surrounding the posterior 

 portion of the head. In the median line this segment is only 2 mm. 

 long and is the shortest segment with the exception of the seventh, 

 which is also but 2 mm. in length. The second segment is 3J mm. 

 long; the third and fourth 4 mm. each; the fifth 3 mm.; and the 

 sixth 2^ mm. long. Epimera are distinct on all the segments with the 

 exception of the first. They are in the form of extremely narrow, 

 elongated plates, which in the second segment extend a little more 

 than half the length of the lateral margin, in the 

 third and fourth segments about two-thirds of 

 the lateral margin, and in the last three seg- 

 ments the entire length of the lateral margin. In a 

 dorsal view the first three epimera are not visible. 



The abdomen is composed of three segments, 

 two short ones anterior to the long terminal seg- 

 ment. At the base of the terminal segment is a 

 suture line on either side, indicating another 

 partly coalesced segment. The terminal segment 

 is mm. long and 5 mm. wide at the base; it 

 tapers gradually to a rounded extremity. 



The first four pairs of legs are directed for- 

 ward, the last three pairs backward. All the 

 legs are very small and short. 

 Only one specimen, a female, was collected at Same, Rikuoku, 

 Japan. 



Type-specimen.— Cat. No. 39516, U.S.N.M. 



Fig. 31. — Pendidotea 

 rotundata. maxil- 

 LIPED. X 15S. 



Genus SYNIDOTEA Harger. 



SYNIDOTEA BICUSPIDA (Owen). 



Idotea Mcuspida Owen, Crustacea of the Blossom, 1839, p. 92, pi. 27, fig. 6. 

 Idotea pulchra Lockington, Proc. Cal. Acad. Sci., vol. 7, 1877, p. 44. 

 Edotea Mcuspida Mieks, Journ. Linn. Soc. London, vol. 16, 1883, p. 66. 

 Synidotea Mcuspida Sars, Crust. Norwegian North Atlantic Exp., 1885, p. 116, 



pi. 10, figs. 24-26.— Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 391-392.— 



Richardson, Proc. U. S. Nat. Mus., vol. 21, 1899, p. 848; Ann. Mag. Nat. 



Hist. (7), 1899, p. 268; American Naturalist, vol 34, 1900, p. 228; Bull. U. S. 



Nat. Mus., No. 54, 1905, pp. 385-386. 



Localities. — Station 3253, between Bristol Bay and Pribilof Islands ; 

 station 3255, N. and N. W. of Unimak Island. 



Depth. — Thirty-six to forty-nine fathoms, in green mud, broken 

 shells, and gray sand and gravel. 



