10 ACANTHOCHITES. 



Length 25, breadth 11, mill.; divergence 110. 



Length 15, breadth 7 mill. 



Fiinnnrk nd Great Britain, south to Mogador ; off the Strait of 

 Gibraltar t (and perhapt the Canaries); Mediterranean mid Adriatic 

 Seas. On rocks, stones and oyster shells from low tide to 25 fms. 



:toti fascicularis ~LnM., Syst. Nat. xii, p. 1106 (1766), and of 

 many auth<r>, including LAM., PAYRAUDEAU, PHILIPPI, WEIN- 

 K A ri-'F, FORBES & HANLEY, Hist. Brit. Moll., t. 59, f. 5. JEFFREYS, 

 P.rit. Conch, iii, p. 211 ; v, p. 197, t. 55, f. 3 ; Ann. Mag. Nat. Hist. 

 1870, p. 10; P. Z. S. 1882, p. 666, WOODWARD, Man. of Moll., t. 

 11, f. 30. SOWB., Conch. Illustr., f. 87, 87a. AUDOUIN, Ex. PI. 

 Saviirny, p. 127; Savigny, pi. 3, f. 5. Acantliochites fascicularis 

 SARS, Moll. Reg. Arct. Norv., p. 117. Anisochiton (Acanthochiton) 

 fascicularis Fix -HER, Manuel de Concnyl., p. 881, f. 623 (bad). 

 Anisochiton (Acanthochites) fascicularis BUQ., DAUTZ. and DOLLF., 

 Moll. Rons*, i, p. 502, t. 61, f. 17-20; t. 62, f. 6. Acanthochites car- 

 hiatus Risso, Hist. Nat. Eur. Merid, iv, p. 269 (1826). Acantho- 

 chcetes vulgaris LEACH, Synops. Moll. Gt. Brit., p. 229 (1852). 

 Chiton crinitii* PENNANT, Brit. Zool. iv,p. 71, t. 36, f. 1, Al (1777) ; 

 edition of 1812, vol. iv, p. 142. REEVE, Conch. Icon., t. 26, f. 176. 

 Not Ch. crinitus SOWB. ? Chiton globulosus CHIEREGHINI MS., 

 Brusina's Ipsa Chier. Conch., p. 43, 1870. 



This species is smaller than A. discrepans and the valves are much 

 more coarsely granulated, the granules being ovate, at least toward 

 th<' beaks. The median smooth area is wider than in dwcrepans, 

 and less raised ; the tufts are larger, and the girdle is fringed at the 

 margin. 



Yar. <ift' nn nt a Jeffr. Much longer and narrower in proportion to 

 the breadth. England. 



A. asNEUS (Risso) Monts. 



This Chiton resembles the other species of the group, but is more 

 arched, reddish or bright colored, having distinct granules, and with 

 the hairs of the tufts copper colored; border thick and spinous. 

 This beautiful species belongs to the laminarian zone, and has 

 occurred at various points in the Mediterranean. The A. fas<-i<-n/<iris 

 is littoral, smaller, Mark with the keel chalky white ; and moreover 

 its granulations are less numerous and more prominent. .1. di 



Hi-own is also littoral, is larger and better known. Its col 'ra- 

 tion is ordinarily greenish, it< granules minute and numerous; the 

 hair-tufts are a beautiful silvery green. 



