PLATE I. 
Fig. 1. DENTALIUM gadus. 
Dentalium gadus, Mont. Test. Brit. p. 496, pi. 14, fig. 7- — Linn. Trans, viii. p. 238. 
Fig. ^2. DENTALIUM dentalis. 
Dentalium dentalis, Lin7i. Tra?is. viii. p. 237. 
Dentalium striatum, Mon. Test. Brit. p. 433. 
Fig. 4. DENTALIUM labi^tum. 
Dentalium labiatum. Brown's MSS — A new species. Found by me in Lough Strangford, Ireland In Lady 
Jardine's Cabinet. 
Fig. 7. DENTALIUM entalis. 
Dentalium entalis, Mont. Test. Brit. p. 494 — Mat. and Rack, in Linn. Trans, viii. p. 237- 
Fig. 8. DENTALIUM striatum. 
Dentalium striatum. Brown's MSS. — A new species. Found by me at Holy Island, coast of Northumberland, 
— In Lady Jardine's Cabinet. 
Fig. 10. BROCHUS trachiformis. 
Brochus trachiformis. Brown's MSS. 
Dentalium trachea, Mont. Test. Brit. p. 497- 
Fig. 12. BROCHUS annulatus. 
Brochus annulatus, Brown's MSS. — A new species. Found by me in Lough Strangford. — In Lady Jardine's Ca- 
binet. 
Fig. 11. BROCHUS reticulatus. 
Brochus reticulatus, Brown's MSS. — A new species. Found by me at Killough, County of Down, Ireland In 
Lady Jardine's Cabinet. 
Fig. 13. BROCHUS striatus. 
Brochus striatus, Brown's MSS — A new species. Found at Dunbar by General Bingham. — In his Cabinet. 
Fig. 3. BROCHUS GLABRUS. 
Brochus glabrus. Brown's MSS. 
Dentalium glabrum, Mont. Test. Brit. p. 497. 
Fig. 6. BROCHUS l/evis. 
Bbochus laevis. Brown's MSS. 
Dentalium imperforatum, Mont. Test. Brit. p. 496. — Adam's Mic. pi. 14, fig. 8. 
Fig. 9. BROCHUS arcuatus. 
Brochus arcuatus. Brown's MSS — A new species. Found in sand from Bear Haven, Bantry Bay, Ireland by 
General Bingham, and in his Cabinet. 
Fig. 41, 42. SPIRORBIS SPIRILLUM. 
Spirorbis spirillum. Lam. Si/st. v. p. 359. 
Serpula spirillum, Mo?it. Test. Brit. p. 499. 
Fig. 53, 54. SPIRORBIS spirillum. 
Spirobis spirillum, Fleming in Edin. Ency, vii. p. 68 Mont. Test. Brit. p. 499. 
