ASPIDOBRANCHIA. CHITONID. 229 
Shell with its lateral membrane furnished with bundles of 
little spines. 
ACANTHOCHZETES VULGARIS. 
A. testa carinata, elevato-tuberculata, tuberculis planis sculpta. 
Chiton fascicularis, Linn. Syst. Nat. xii. 1106. no. 4; Chem. 
Conch. 10. t. clxxiii. f. 1638 ; Gmel. Syst. Nat. 1106 ; Pult. 
Cat. Dorset. 25. t. 1. f.2; Brug. Encycl. Méth. t. clxui. 
f.15; Mont. Test. Brit.5; M. & R. Trans. Iinn. Soc. 20. 
t.1.f.1; Flem. Edinb. Encycl. vi.; Dill. Desc. Cat. 8; 
Wood, Gen. Conch. i. 16. t. ii. f.6; Turt. Conch. Dict. 34 ; 
Lam. Hist. Nat. des Anim. sans Vert. vi. 321. 
Habitat in mari Europzeano vulgaris, lapidibus et saxis adhe- 
rens. Long. 4 unc. 
Shell carimated, with elevated plain tubercles. Length 
rather more than half an inch. 
Inhabits the seas of Europe, and is very commonly found 
adhering to rocks and stones. 
Genus 106. Cuiron. 
Testa membrana laterali hispida rugulosa aut tomentosa. 
Shell with its lateral membrane bristled, roughish or woolly. 
1. CHITON CINEREUS. 
C. testa cinerea, dorso lateribusque tuberculis in lineis rectis 
dispositis sculptis. 
Chiton cinereus, Linn. Syst. Nat. xu. 1107.no.9; Born. Mus. 
t. 1. f. 3; Gmel. Syst. Nat. 3204; Pult. Cat. Dorset. 25. 
t. 1. f.4; Mont. Test. Brit.3; M. & R. Trans. Linn. Soc. 
vil. f. 4; Flem. Edinb. Encycl. vii. 76; Dill. Desc. Cat. 
12; Turt. Conch. Dict. 34. 
Habitat in maris Britannici littora scopulosa communis. 
Shell cinereous, with its back and sides seulptured with 
tubercles arranged in straight lines. Length half an inch. 
Inhabits the rocky shores of Great Britain, at Salcombe Bay, 
Devonshire ; Falmouth, Cornwall; Yawl, Bantry and Dingle 
