ISOPODS OF NORTH AMERICA. 



475 



The abdomen is subelliptical in shape or obsoletely six angulate, 

 much wider than long. 



The median lobe of the covering lamella of the pleopods (the 

 peduncle of the first pleopoda) in the males is posteriorly entire. a 



A fuller description of this species is given in the preceding pages 

 (372-379) of the work from which the above is quoted. 



JANIRA ALTA (Stimpson.) 



Asellodes alta STIMPSON, Smithsonian Contributions to Knowledge, VI, 1853, p. 

 41, pi. in, fig. 30. VERRILL, Am. Jour. Sci., VI, 1873, p. 439; VII, 1874, 

 pp. 411-502; Proc. Amer. Assoc., 1874, p. 350. 



Janira alta HARGER, Proc. U. S. Nat. Mus., II, 1879, p. 158; Report U. S. Com- 

 missioner of Fish and Fisheries, 1880, Pt. 6, pp. 321-322, pis. n-iii, figs. 9, 12, 

 13. RICHARDSON, American Naturalist, XXXIV, 1900, p. 300; Proc. U. S. 

 Nat. Mus., XXIII, 1901, p. 556. 



Localities. Long Island; Massachusetts Bay; near Eastport, Maine; 

 Gulf of Maine; Grand Menan; Bay of Fundy; 120 miles south of 

 Halifax; Grand Banks; Glarkes Ledge; 

 30 miles east of Sable Island; off Ghes- 

 apeake Bay. 



Depth. 35 to 487 fathoms. 



Body oblong-ovate, nearly three 

 times longer than wide, 2 mm.: 7 

 mm., not including the uropoda. 



Head nearly three times as broad as 

 long, with the lateral portions expand- 

 ed and the lateral margins straight. 

 The front is produced in the middle 

 in a long narrow process with apex 

 rounded. The eyes are small, round, 

 composite, and dorsally placed. The 

 antero-lateral angles of the head are 

 very slightly produced and are rounded. 

 The first pair of antenna? have the 

 three articles, forming the peduncle, 

 about equal in length. The flagellum is composed of fourteen articles. 

 The second pair of antennas have the first four articles short and 

 subequal; the two following ones are very long, the sixth being longer 

 than the fifth. The sixth article is 2 mm. in length; the fifth is 1 

 mm. long. The flagellum is multiarticulate and is 5 mm. long. The 

 second antennas are as long as the body. The maxillipeds have a palp 



The above description is adapted from the following one of Kr0yer's: 

 Latior (latitude dimidiam fere sequans longitudinem ) . Caput antice tribus arma- 

 tum cornibus vel aculeis, serie positis transversali. Antennae inferiores longitudinem 

 animalis aequantes, articulo pedunculi secundo crassissimo, aculeo marginis exterioris 

 maximo. Abdomen subellipticum vel obsolete sexangulatum, multo latius quam 

 longum. Lobus laminae branchiarum tectorise intermedius apud mares postice 

 jnteger. KR0YER, Nat. Tidsskr. (2), II, 1846-49, pp. 372-379, 380. 



FIG. 531. JANIRA ALTA (AFTER HARGER). 

 x 5. 



