ISOPODS OF NORTH AMERICA. 



95 



CIROLANA CONCHARUM (Stimpson). 



JEga concharum STIMPSON, Smithsonian Contributions to Knowledge, VI, 1853, 



p. 42. LUTKEN, Vidensk. Meddel., 1859, p. 77. 

 Conilera concharum HARGER in VERRILL, Report U. S. 



Commissioner of Fish and Fisheries, 1873, Pt. 1, 



p. 572 (278); p. 459 (165). 

 Cirolana concharum HARGER, Proc. U. S. Nat. Mus., 



II, 1879, p. 161; Report U. S. Commissioner of 



Fish and Fisheries, 1880, Pt. 6, pp. 378-381, pis. 



ix-x, figs. 58-63; Bull. Mus. Comp. Zool., Har- 

 vard College, XI, No. 4, 1883, pi. i, fig. 4; pi. n, 



figs. 4-4c. RICHARDSON, American Naturalist, 



XXXIV, 1900, p. 216; Proc. U. S. Nat. Mus., 



XXIII, 1901, p. 513. 



Localities. Currituck, North Carolina; 

 Charleston, South Carolina; Woods Hole, Mas- 

 sachusetts; Amagansett, Long Island; Vine3 r ard 

 Sound; off Fishers Island; off New Shoreham; 

 Block Island; Long Island .Sound; Halifax, Nova 

 Scotia. 



Depth. Surface to 18 fathoms; muddy and 

 sandy bottom. 



From stomach of skate; under eye of Pseudotriacis microdon. 



It feeds on the common blue crab. From a single crab as many as 

 108 specimens have been taken. 



FIG. 75. CIROLANA CONCHA- 

 RUM (AFTER HARGER). 



FIG. 76. CIROLANA CONCHARUM. a, MAXILLIPED. x 15}. b, MANDIBLE, x 15}. c, FIRST MAXILLA. 

 x 15}. d, FRONTAL LAMINA, x 27}. e, SECOND MAXILLA, x 15}. 



Body oblong-ovate, about three times longer than broad; 8 mm.: 

 23 mm. 



Head wider than long, 3 mm.: 4 mm., with the anterior margin 

 rounded and produced in a small median point. Eyes small, irregular 

 in outline, composed of numerous ocelli, and situated in the antero- 



