122 
BRITISH MOLLUSCA. 
Mod. depressa, Hanley , Rec. Shells , i. 242, note. 
Modiolaria nigra, Loven, I. M. 33. n. 249. 
Crenella nigra. King , Ann. N. H. xviii. 239 ; Forbes £f Hanley, 
Brit . Moll. ii. 202. t. 44. f. 5, & t. Q. f. 7, animal. 
a — c. Black Rocks, Leith. 
d — k. Britain. 
I — y , jnn. Britain. 
z — e e, jun. Sunderland. 
*** - 
6. Crenella Prideauxiana. 
Modiola Prideauxiana, Leach, Zool. Misc. ii. 35 ; Brown , III. C. 
t. 29. f. 9, ed. 2. t. 27. f. 9. 
Modiola rhombea, Berkeley, Zool. Journ. iii. 229 ; Supp. 1. 18. f. 1 ; 
Thorpe, Brit . Mar. Conch. 107 ; Brown, III. Conch, ed. 2. 78. 
t. 39. f. 17. 
Crenella rhombea, Forbes fy Hanley, Brit. Moll. ii. 208. t. 45. f. 3. 
Modiola costulata, Philippi, Sic. 70. t. 5. f. 1; not Philippi, ii. 50, 
nor Risso. 
Mod. Petagnse, Scacchi; Philippi, ii. 51. 
a — d. Coast of Devonshire. Presented by — Prideaux, Esq*. 
e. Weymouth. Presented by the Rev. M. J. Berkeley. 
Fam. 2. Drexssenidje. 
Dreissenadse, Gray, Turton Man. ed. 2. 299. 
Dreissenidae, Gray, Syn. B.M. 1840; 1842, 82, 91 ; Proc. Zool. 
Soc. 1847, 199. 
Mytilaces, part., Rang , Man. 290. 
Mytilacea, part., Anton, Verz. Conch. 12. 
Chaxnaceae, part., Herrmannsen , Ind. 409. 
1. Dreissena. 
Dreissena, Van Beneden, Ann. Sci. Nat. 1835 ; Gray, Turton* s 
Man. Land Sf Freshwater Shells, 300 ; Syn. B. M. 1840 ; 1842, 
82, 92 ; Proc. Z. S. 1847, 199 ; Forbes $ Hanley, Brit. Moll. ii. 
Driessena, Brown, III. C. G. B. 
Mytilina or Mytulina, Cantraine, 1835. 
Trichogonia, Rossmasler, Icon. 1835. 
Cselogonia, Bronn. 
Mytilus A, Rang, Man. ; Megerle, Entw. 1811. 
Mytilus, sp., Schrbter, Einleit.; Sow. Gen.; Lamk. Hist. ed. 2. vii. 
Dythalmia, Jay. 
1, Dreissena polymorpha. 
Mytilus Yolgae, Chemn. xi. 256. t. 205. f. 2028. 
Myt. polymorphus, Pallas, Voy . Russ. i. 478, App. 211 ; Schrbter, 
