tp 
Descriptive Catalogue of the British Testacea. 109 
Dr. Pulteney first suspected M. barbatus of Linnæus 
= to be the young of M. Modiolus. The truth of this surmise 
has been confirmed by Mr. M‘Leay, who has had an — 
opportunity of examining this species in all the stages 
of its growth. 
8. 
umbilica- M. testa obovata, antiquata, rugosa, margine posteriore 
tus. alterius valvulz involuto. 
Pennant Brit. Zool. 4. 1. 65. f. 16. 
Da Costa Brit. Conch. p. 220. M. curvirostratus. 
Donovan Brit. Shells, t. 40. 
Montagu Test. Brit. p. 164. 
- Habitat in pelago. 
Testa magnitudine, forma, et colore M. Modioli, cui maxime affinis ; rudis, 
crassa, rugosa, epidermide nigricante-fusca; ssepius serpulis aliisque 
testaceis obtecta. An varietas solum ? 
Discovered by the Rev. Hugh em off Priestholme 
5 Island, Anglesea. 
E M. testa ovata, anterius compressiuscula, fragilissima, 
t. 3. A. f.2. cardine laterali. Linn. Syst. Nat. p. 1158. m. 257. 
g. Linn. Gmel. p. 3355. 
t.3. A. f. 3. Lister Anim. Angl. App. t.1. 3. 
Gualt. Test. t. 7. f. F. PDA 
~ D’Argenv. Conch. t. 31. f. 10. sin. 
"Pennant Brit. Zool. 1. 61. f- 18. 2 
Da Costa Brit. Conch. p. 214. t. 15. f 2. 
Schrót. Flussconch. t. 8. f. 1. 
` Chemn. Conch. 8. t. 86. f. 762. 
Pulteney in Hutch. Dorset. p. 38. t. 12. f. 2. 
Donovan Brit. Shells, t. 55. 
Montagu Test. Brit. p. 179. 
Conch. t. 156. f. Hk 
Habitat 
