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2. A Catalogue of the species of Emarginula, a genus of 

 Gasteropodous Mollusca, belonging to the family 

 Fissurellid^ ; in the Collection of H. Cuming, Esq. 

 By xIrthur Adams, R.N., F.L.S. etc. 



Genus Emarginula, Lamarck. 



Head proboscidiform ; tentacles subulate, with the eyes on tuber- 

 cles at their external bases ; foot with a range of cirrhi round the 

 sides ; mantle-margin simple ; branchial plumes two ; anal siphon 

 with its angulated membranous sides projecting from the edges of the 

 fissure ; tongue with a central laminar subquadrate tooth and nume- 

 rous lateral teeth. 



Shell conical, with an elevated slightly recurved entire vertex turned 

 towards the posterior end ; surface cancellated ; aperture emarginated 

 in front by a slit, which runs for some distance up the shell ; interior 

 without a partition ; muscular impression cresceiitic, interrupted in 

 front. 



Emarginulus, Montf. — Patella, sp. Linn. 



1. Emarginula fissura, Linn. 



Patella Jissur a, Linn. Syst. Nat. ed. 12. p. 1261. — Emarg. fissura, 

 Flem. — Emarg. Icevis, Recluz. — Emarg. curvirostris, Macgil. 

 Hab. British Islands. Mus. Cuming. 



2. Emarginula reticulata, Chemn. 



Emarg. reticulata, Chemn. ; Sowerby, Genera (Emarg.), f. 5. 

 Hab. Malta, on stones. Mus. Cuming. 



3. Emarginula cancellata, Philippi. 



Emarg. cancellata, Phil. En. Moll. Sicil. pi. 7. fig. \b.—1Patella 

 crystallina. Wood. 



Hab. Sicily, and island of Faros. Mus. Cuming. 



4. Emarginula fissurata, Chemn. 



Patella fissurata, Chemn. 11.1 929-30 ; Sowerby, Genera (Emarg.), 

 fig. 3. — Emarg. rubra. Lam. Hist. 



Hab. Seas of Europe. Mus. Cummg. 



.5. Emarginula curvirostris, Deshayes. 



Emarg. conica, Blainville, Man. pi. 48. fig. 4. 

 Hab. ? 



6. Emarginula rosea, Bell. 



Emarg. rosea. Bell, Zool. Journ. vol. i. 1824. — Emarg. pileolus, 

 Michaud. — Emarg. capuliformis, Philippi. 

 Hab. British Islands. Mus. Cuming. 



7. Emarginula crassa, J. Sowerby. 



Emarg. crassa, J. Sowerby, Min. Conch, pi. 33 ; Forbes and Han- 

 ley, Brit. Moll. pi. 63. fig. 2. 



Hab. Norwegian Seas. Mus. Cuming. 



