114 
BRITISH MOLLUSCA. 
Pectunculus pilosus, LamJc. Hist. 2nd ed. vi. 448 ; Turt. B. Biv. 
172. t. 12. f. 2; Fleming, Edin. Enc. vii. 97. t. 203. f. 18; 
Brit. An. 400 ; Hanley, Thorpe, M. C. xxix. ; Forbes, M. G. S. 
i. 416. 64 ; Malac. Monens. 42; Brown, III. C . G. B. 85. t. 33. 
f. 10, 11; Blainv. Man. Malac. t. 65 bis, f. 3; Philippi, Moll. 
Sic. i. 61, ii. 44 ; Sow. Conch. Man. f. 134 ; Hanley, Bee. Shells, 
i. 162. t. 10, Area, f. 36, 37. 
Axinaea polyderma, Axinaeoderma pilosus, Poli , Test. Sicil. ii. 
254-259. 
Area minima, Turt. Conch. Diet. 8. 
Glycimeris orbicularis, Da Costa, 168. 1. 11. f. 2. 
Area undata, Chemn. (not Linn.) Conch. Cab.\ ii. 224. t. 57. f. 560. 
A. marmorata, Chemn. 1. c. f. 563 ? 
Pectunculus variabilis. Sow. M. C. t. 471. f. 1. 
Pect. undatus, Turt. B. Biv. 173. 1. 12. f. 3, 4. 
Pect. decussatus, Turt. B. Biv. 173. t. 12. f. 5 ; Flem. B. An. 400 ; 
Thorpe, Brit. Mar. Conch. 104. 
Pect. nummarius, Turt. Brit. Biv. 174. 1. 12. f. 6 ; Flem. B. An. 
400; Thorpe, Brit. Mar. Conch. 104. 
Young. Pectunculus decussatus, Turt on, Biv. 173. 1. 12. f. 5. 
a — i. Weymouth. 
j — m. Island of Bute. 
Order IY. POGONOPODA. 
Pogonopoda, Gray, Med. Repos. 1821, 237 ; Syn. B. M. 1840, 
81, 91 ; Proc. Zool. Soc. 184 7, 198. 
Les Byssiferes, part., LamJc. Phil. Zool. 317, 1809; Ext. Cour. 
105 (1812). 
Asipbonia Byssifera, part., Rajin. Anal. Nat. 1815. 
Conchiferes monomvaires, part., LamJc. Ann. Mus. x. 389 ; Hist . 
vi. 100. 
Conch. Dimyaires lamellipedes, part., LamJc. Hist. v. 
Ostraces dimyaires, and Benitiers, Cuvier, R. A.; Feruss. Prod . 
39,41. 
Ostracea Dimya, MenJce, Syn. 101, 1830. 
Mytyli and Tridacnae, EicJiw. Zool. Spec. i. 285. 
Ostracea (Ostracees), LamJc. Phil. Zool. 1809 ; Extr. du Cour . 
1812. 
Ostreacese, Schweigger , Naturg. 712, 1820. 
Fam. 1. Mytilid/E. 
Mytilidae, Fleming, Brit. Anim. 408, 1828 ; Gray, Syn. B . M. 
1840; 1842, 82; Proc. Zool. Soc. 1847, 198. 
Callitriche and Callitrichoderma, Poli, Test. Sicil . 
