PLATE XIII 



ASSIMINEA. 



1. A. Grayana, Jeffreys. — JAmneus and Paludina G. — Greenwich and 



other marshes. 



2. A. littorea, Belle Chiaje, (Helix littorina.) — Rissoa globularis and 



littorea. — On shore at Weymouth, Serk, Portland, Mr. 



Rissoa, or Cingula. 



3. R. ulv<e, Pennant, (Turbo.) — Helix, Cingula, Paludina, and Litto- 



rina. — In brackish water, on British shores, C. 

 8*. var. subnmbilicata, R. 



4. R. Barleei, Jeffreys. — R. ulva var. — Loch Carron, Skye, R. 



5. R. striatula, Mont. — R., Turbo, Cingula, and Littorina carinata 



and monilis. — Devon, Margate, Galway, Herm, etc., to 7 fath., 

 Mr. ; S. Eu. Carinated. 



6. R. cimicoides, Forbes. — R. sculpta. — W. Scotland. Like R. zet- 



landica, but with outer lip crenulated ; finely decussated. 



7. R. ZETLANDICA, Mont. (Turbo.) — R., Cyclostoma, Cingula scalari- 



formis, Cyclostrema z. — N. Scotland, to 60 fath., Mc. Whorls 

 angulated. 



8. R. crenulata, Michaud. — Turbo and R. cimex and cancettatus. — ■ 



Falmouth, Cornwall, Skye, Galway, C. Very coarsely cancellated. 



9. R. calathus. — Forbes and Hanley. — Sheerness, Whitesand Bay, 15 



to 50 fath., R. Finely cancellated. 



10. R. Beanij, Hanley. — Cornwall, Plymouth, Orkney, Galway, C. ; 



N. Eu. Striated. 



11. R. abyssioola, Forbes. — N. Scotland; deep water, R. 



12. R. lactea, Michaud. — Turbo cancettatus, — Jersey and Medit., Rr. 



Oval, plicated and striated. 



13. R. PUNCTURA, Montagu. — Turbo aud Cingula and R. reticulata. 



— Brit. co. generally, 10 to 20 fath. 



14. R. costata, Adams. — R., Turbo, Cingula plicata, costata, and exigua. 



— South co. Brit., S. Wales, Orkneys, Ireland, Chanuel Isls., 

 to 25 fath., C. 



15. R. striata, Mont. — R., Turbo, and Cingula semicostata, minulissi- 



ma, communis, gracilis, etc. — Brit. co. generally, N. and S. Eu. ; 

 littoral C. 



16. 17, 18. R. parva, Costa. — T., C, and R. sublutea, lactea, alba, 



etc., R. interrupta (var. f. 17), R. Sarsii, var. f. 18 (unique). — 

 Brit, shores generally, C. 

 19. R. oostulata, Alder. — Turbo variabilis, R.similis. — Devon, Chan- 

 nel Isls., W. Ireland, etc., C. ; S. Eu. 



