ISOPODS OF NORTH AMERICA. 



95 



CIROLANA CONCHARUM (Stimpson). 



jEga concharum Htimi'son, Siuitliyoniaii C'ontributiDiis to Knowledf^t', VI, 1853, 



p. 42. — LfTKEN, Vidensk. Meddel., 1859, p. 77. 

 Conilera cunchariun Hak(;ek in Vkkkim., Report U. S. 



Commissioner of Fi?h and Fisheries, 1873, Pt. 1, 



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

 Cirolana concharum HAKCiER, Proc. IT. S. Nat. Mas., 



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. r, fig. 4; \)\. ii, 



figs. 4-4c. — Richardson, American Naturalist, 



XXXIV, 1900, p. 21(i; J'roc. U. S. Nat. Mus., 



XXIII, 1901, p. 513. 



Localities. — Curritiu-k, North Carolina; 

 Charleston, South Carolina; Woods Hole, Mas- 

 sachusetts; Aniag-ansett, Long* Island; Vine^^ard 

 Sound; off Fishers Island; off New Shorehani; 

 Block Island; Long* Island Sound; Halifax, Nova 

 Scotia. 



Depth. — Surface to IS fathoms; nuiddy and 

 sandy bottom. 



From stomach of skate; under eye of I\se}uJotriaeis microdon. 



It feeds on the conuuon l)lue crab. From a single crab as many as 

 108 specimens have l)een taken. 



5.— Cirolana conih.v- 

 KiM (After Harger). 



Fig. 76.— Cirolana concharum. a, Maxilliped. x 15j. 6, Mandible, x 15J. c, First maxilla. 

 X 15j. d, Frontal lamina, x 27j. e, Second maxilla, x 155. 



Body oblong-ovate, about three times longer than l)r()ad; 8 mm.: 

 28 mm. 



Head wider than long, 3 nmi.:! 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- 



