114 
BRITISH MOLLUSCA. 
Pectunculus pilosus, Lamk. 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. 1 
254-259. 
Area minima, Turt. Conch. Diet. 8. 
Glycimeris orbicularis, Da Costa, 168. 1. 11. f. 2. 
Area undata, Chemn. (not Linn.) Conch. Cab. vii. 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. 1. 12. f. 5 ; Flem. B. An. 400 ; 
Thorpe, Brit. Mar. Conch. 104. 
Pect. nummarius, Turt. Brit. Biv. 174. t. 12. f. 6 ; Flem. B. An. 
400 ; Thorpe, Brit. Mar. Conch. 104. 
Young. Pectunculus decussatus, Turton, 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., Lamk. Phil. Zool. 317, 1809; Ext. Cour. 
105(1812). 
Asiphonia Byssifera, part., Rajin. Anal. Nat. 1815. 
Conchiferes monomyaires, part., Lamk. Ann. Mus. x. 389 ; Hist. 
vi. 100. 
Conch. Dimyaires lamellipedes, part., Lamk. Hist. v. 
Ostraces dimyaires, and Benitiers, Cuvier, R. A.; Feruss. Prod. 
39, 41. 
Ostracea Dimya, Menke, Syn. 101, 1830. 
Mytyli and Tridacnse, Eichw. Zool. Spec. i. 285. 
Ostracea (Ostracees), Lamk. Phil. Zool. 1809; Extr. du Cour 
1812. 
Ostreaceae, 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. 
