336 Mr. J. G. Jeffreys on the recent species of Odostomia 



Var. b. gracilior, anfractibus productioribus. 

 Odostomia eulimoides, Hanley in Zool. Proc. 1844; Thorpe, Br. 

 Mar. Conch. 36. fig. 12. 



Tenby ; Lerwick ; Oxwich Bay near Swansea. Oban and west 

 coast of Scotland; Guernsey (Mr. Barlee). South coast of Devon 

 (Mrs. Richard Smith). Torquay (Dr. Battersby). 



Var. c. minor, subovalis. 

 Dealvoe, Zetland. West coast of Scotland (Mr. Barlee). Tor- 

 quay (Dr. Battersby). 



Var. d. 1-6 transversis carinis notata. 



N.B. These ridges appear to be caused by the confluence and 

 excessive prominence of the irregular spiral strise which are some- 

 times observable in this species. 



Odostomia crassa, Thompson in Ann. Nat. Hist. vol. xv. (1845), 

 p. 315. pi. 19. fig. 5. 



Jaminia pullus , Br. 22. pi. 9. fig. 11. 



Turbonilla crassa, Lov. 18. 



Birtabuy Bay, co. Galway (Mr. Barlee). Torquay (Mr. Hanley). 



Var. e. ovalis. 



Zetland, five miles east of Lerwick, in forty fathoms. 



Monstr. spira producta et anfractibus complanatis. 



Birtabuy Bay, co. Galway (Mr. Barlee). 



One of the most common species. 



It may be objected to the specific name here proposed to be 

 retained as that of Montagu, that he described the shells " as 

 destitute of any tooth /- But the tooth in this species is very 

 much sunk within the aperture and not easily perceptible, and 

 Montagu evidently made the same mistake with respect to his 

 Turbo decussatus (Odostomia pellucida of Searles Wood and this 

 catalogue), in which he did not notice the fold on the pillar lip. 

 It ought also to be recollected that it is now nearly half a cen- 

 tury since the publication of Montagu's work, and although the 

 general accuracy of his descriptions is undeniable, the materials 

 which he had at that time were by no means equal to those 

 which the use of the dredge and other appliances have in modern 

 days placed at the disposal of (so to say) marine naturalists. 



2. Odostomia notata. 



Testa oblongo-ovata, tenuis, nitida, opaca, concentrice striis 

 sequis confertis impressis et fere undulatis notata ; anfractus 6, 

 convexi, ultimo § spirse subsequante, cseteris sensim decresccn- 

 tibus ; apex obtusus ; sutura distincta ; apertura oblongo-ovata, 

 infra subeffusa et incrassata ; umbilicus vix ullus ; denticulus 

 validus, obliquus. Longitudo plus quam |, latitudo y 1 ^ uncise. 



