PLATE XVII, 



Odostomia. 

 Fig. 



1. 0. unidentata, Mont. (Turbo.) — Folnta u., 0. plicala.—Brit. co. 



generally, Mc. Eat her conical. Tooth strong ; no epidermis. 



2. 0. turrita, Hartley, Brit. Mar. Conch. — 0. unident'ata, var. 



B. M.— E. More lengthened than No. 1. 



3. 4. 0. acuta, Jeffreys. — Torbay, Loch Fyne, Galway, etc., Mc. 



Strong, conical. Suture deep. 



5. 0. plicata, Mont. {Turbo.) — Folnta p., F. plicatula, 0. Anna, 



Jaminia p., etc., Mc. — Salcombe, Swansea, Dublin, Aberdeen, 

 Mc. Turreted. Narrow, thin. 



6. 0. insculpta, Mont. (Turbo.) — Folula, Jaminia, and 0. ins. — 



S. Devon, Oban, Hebrides, etc., E. Conical, spirally striated. 



7. 0. pallida, Mont. (Turbo.) — Fol., Gingula, Pkasianella p., 0. am- 



bigua. — S. Devon, Er. Broad. Tnin, pillar straight. 



8. 0. conoiuea, Brock. — Turbo, Odost., etc. — N. Scotland, Mc. S. 



Devon, Mr. N. and S. Eu. White. Whorls straight ; throat 

 striated. 



9. 0. conspicua, Alder. — Isl. Man, Whitburn, Herm. Coloured. 



Whorls rounded ; throat striated. 



10. 0. truncatula, Jeffreys. — Plymouth. Elongated. 



11. O. cylindrica, Alder. — Turbo nivosus? — S. Devon, Ilfracombe, 



Guernsey, Cork, E. Cylindrical, few whorls. 



12. 13. 0. eulimoides, Ranley. — 0. crassa, 0. pallida (var. f. 13), 



0. noiata. — Brit. co. generally. Coralline zone, Mr. Ample 

 body-whorl. 



14. 0. dubia, Jeffr. — S. Devon, Lerwick, Guernsey, Mr. Eather large 



body-whorl. 



15, 16. 0. alba, Jeffreys, (and var.) — Swansea, Skye, Zetland, Guernsey, 



Mr. Thin, whorls rounded. 



17. 0. nitida, Alder. — S. Devon. Littoral, Mc. Aperture differently 



formed from No. 17. 



18. 0. Lukisii, Jeffreys, Ann. Nat. Hist. 1859. — Guernsey. Sub- 



littoral and coralline, Mc. Whorls tumid ; a slight umbilicus. 



19. 0. glabrata, Muhlfeldt, (Helix.) — Rissoa punctulum, etc. — Zet- 



land, E. Pillar-lip thin, arched. 



20. 0. rissoides, Hanley. — 0. scalaris. — Channel Isls., Devon, Corn- 



wall, Tenby, etc., Mc. Thin, conical, no umbilicus. 



21. 0. albella, Loveii. — 0. rissoides, var., B. M. — Guernsey, S. 



Devon, etc. Turreted, upper whorls more cylindrical than 

 No. 20. 



22. 0. obliqua, Alder. — Tynemouth, Guernsey, 7 fath. to deep water, 



Er. Thin, oblique. 



/ 



