18 HANLEYA. 



British seas northward ; Scandinavia ; Mageroe, near North Cape, 

 in 25-300 fins. ; Stellwagen Bank, Massachusetts Bay, in 38 fms. 



Chiton hanleyi BEAN, suppl. to Thorpe's Brit. Mar. Conch, p. 263, 

 f. 57, 1844. FORBES and HANLEY, Hist. Brit. Moll, ii, p. 398, t. 

 62, f. 2. JEFFR., Brit. Conch, iii, p. 215 ; v, p. 198, t. 55, f. s. 

 SARS, Moll. Reg. Arct. Norv. p. 109, t. 7, f. 5. Hanleia hanleyi 

 Bean, CPR. mss. p. 8. Hanleya debilis GRAY, Guide, p. 186, J857. 

 Hanleyia debilis Gray, DALL,Proc.U. S. Nat. Mus. 1878, p. 319. 

 f Chiton nagelfar LOVEN, Ind. Moll., p. 26. 



This species has been reported from Palermo by Monterosato 

 (Jour, de Conch. 1878, p. 147). 



Var. ABYSSORUM M. Sars. PL 4, figs. 74, 75, 76, 77. 



Closely allied to H. hanleyi, but more than double the size, hav- 

 ing the girdle wider and thicker, spicules shorter; shell narrower, 

 with less distinct sculpture. Pale brown, the girdle flesh-brown. 

 Length 34 mill. (Sars.} 



Bergen, Norway, 1 50-200 fms. 



Ch. abyssorum M. Sars, G. O. SARS, Moll. Reg. Arct. Norv. p. 

 109, t. 7, f. 4; t. 34, f. 3. 



H. MENDICARIA Mighels & Adams. PI. 4, figs. 82, 83, 84, 85. 



Shell oblong-oval, not much elevated, dorsal ridge obtuse, lateral 

 slopes flattened ; ashen-white, the entire surface granulated, gran- 

 ules closely crowded, forming longitudinal series, about 20 on each 

 side ; lateral areas hardly defined, irregularly granulated, the granules 

 larger. Jugum scarcely denned, broadly vaulted. Mucro low or 

 flat, central. 



Interior having a solid, rather acute, but scarcely fissured inser- 

 tion plate to the anterior valve ; none upon the central and posterior 

 valves. Sutural plates large, subtriangular ; sinus simple, wide, 

 scarcely laminate. Eaves wide. Girdle wide, solid, leathery, 

 very finely spiculate, the spicules glassy, here and there crowded ; 

 no pores. 



Gills posterior, about 15 on each side. 



Length 15, breadth 8f mill; divergence 123. 



Length 27, breadth 15 mill.; divergence 108. (Cpr.} 



Casco Bay, Portland Harbor and Grand Manan, Maine. 



Chiton mendicarins M. & A., Bost. Journ. N. H. iv, p. 42, t. 4, f. 

 8, 1842. GOULD, Invert, of Mass., Binney's Edit., p. 263, f. 526. 

 Chiton (Acanthopleura) mendicarins Migh., JEFFR., P. Z. S. 1882 ? 



