250 J. S. Gardner — British Eocene Land Mollusca. 



and very regularly ribbed obliquely. As pointed out by Mr. Searles 

 "Wood, it so closely resembles a group of North American species as 

 to be separable from tliem only on most trifling grounds. It comes 

 perhaps nearest among them to H. striatelln, Anthon3^ Its range 

 seems restricted to the Bembridge Limestone. Sandberger would 

 place it in the genus Discus, Fitzinger. 



H. LABYRiNTHicA, Say. — This minute, but strongly characterized 

 shell from Headon Hill and Hordwell is identified with every pro- 

 priety with a North American species, ranging from Ohio to Florida 

 and Missouri to Tex*as. Sandberger, however, considers that there 

 are points of difference, and proposes the name " psetidolabyrinthicus," 

 and places it in Anton's subgenus Strohilus. 



H. SUBLABYRINTHICA, Edwards. — This is a small unique shell of 

 quite different outline to the last, and perhaps more properly refer- 

 able to Pupa. Sandberger mentions an almost identical form as oc- 

 curring in the limestone of Lautrec. 



H. Headonensis, Edwards. — A rare and very minute shell, com- 

 posed of 6 or 7 rounded whorls, 3 teeth on the outer lip, and wide 

 umbilicus. I have been unable to ascertain that there is any livi»g 

 species resembling it, but Sandberger compares it to Gastrodonta 

 lasmodon, Phillips, of Alabama and Tennessee. 



The small turrited pulmonates are of greater interest and would 

 well repay a most careful examination. Omitting Bulimus politiis, 

 which seems to be a freshwater shell, we have the following terres- 

 trial species : 



Fam. POMATIASIN^. 



PoMATiA^ HETEROSTOMus, MS., Edwards sp. — Though described as 

 a Bulimus, this clearly belongs to the genus Pomatia, a small group 

 of chiefly European species, but with outliers in New Zealand, 

 Ilodriguez, Norfolk Island and the Himalayas. It might be identi- 

 fied with one of the European species. B. Vectiensis, MS., may 

 indicate a second species, but only casts are known. 



Fam. PiiPiN^. 



Pupa perdentata, Edwards. — This is a very elongated, cylindrical 

 shell, finely striated and distinguished by the great number of teeth, 

 14, with which the outer lip is furnished. No living species of 

 l-'upa seems to come very near to it. Sandberger says that similar 

 though imperfect shells occur in the same horizon in the south of 

 France and at Buxweiler. It belongs to the sub-genus Torquilla, 

 Faure-Biguet. 



Pupa oryza, Edwards. — This a small cylindrical shell, strongly 

 resembling P. stenopylis, Benson, and P. lapidaria, Hutton, of the 

 Himalayas. 

 Clausilia striatula, Edwards, op. cit., 1852. Plate VI. Fig. 7. 



A very perfect specimen from the Bembridge Limestone has been 

 procured since the species was published, showing it to have been a 

 slender cylindrical shell 24 mm. long, composed of 15 whorls, tapered 

 at both extremities, 4^ mm. wide, sinistral like most of the genus. The 

 entire shell is covered with an exceedingly delicate ribbing, at right 

 ■^ Sub-genus Fomatia, Eeck. 



