LAND SHELLS. 113 



angle at the carina. Lip thickened, reflected only at its junction with the body whorl, near 

 the umbilicus. There is a slight deposition of callus on the columella. Throat and lip lilac 

 colored. 



Greatest diameter, 37 ; lesser, 32 ; altitude, 18 millimetres. 



Geographical distribution. — Found by Dr. Newberry, on the hills near San Francisco, Cali- 

 fornia. Has not, as yet, been detected in any other locality. 



BemarJcs. — In general appearance it is most nearly allied to H. jidelis, Gray. It has not, 

 however, the revolving bands, and is at once recognized by its lenticular shape. From all the 

 other described species of the western coast it is readily known by the peculiar protuberances 

 which crowd the epidermis. Dr. Gould compares it in general form to H. plicata, Born. It 

 must be a rare species. But one mature specimen was brought, which is the only one I have 

 ever seen, with the exception of a single shell in the collection of Mr. Thomas Bland, of New 

 York. 



No. 3. HELIX OERUGINOSA, Gould. 



Var. /9. 



Testa globosa, solida, inaxime elevata; castanea, maculis irregularibus olivaceis longitudinali- 

 bus et fascia rufa volvente variegata; anfr. 7 convexi, indentati, et minutissime granulati, spira 

 conica, elevata ; sutura impressa ; subtus inflata ; apertura depresso-rotundata, intus fasciata ; 

 labrum album, ad umbilicum profundum et fere tectum, reflexiusculum. 



SYNONYMS AND REFERENCES. 

 Helix aeruginosa, Gould, Proc. Boston, S. N. H. V., p. 127, anno Febr., 1855. 



DESCRIPTION. 



Animal not yet observed. 



Shell. — Heavy, subglobose, conic, with a very elevated spire. Whorls seven, rounded, the 

 last quite ventricose, with a narrow black revolving line, which becomes concealed by the 

 sutures of the upper whorls ; suture well defined, impressed. Below subglobose, aperture ovate, 

 with a white thickened lip, reflected only at the deep umbilicus, which it nearly conceals. 

 Columella with a light callus, epidermis yellowish, broken by irregular, 'zigzag, rufous blotches, 

 running parallel to the incremental wrinkles. Surface smooth, .unbroken by the strias of 

 increase, which are not prominent, and indented as in H. Townsendiana. There are also 

 microscopic granulations. 



Greatest diameter, 32 ; lesser, 27 ; altitude, 19 millimetres. 



Geographical distribution. — Found by Dr. J. S. Newberry north of San Francisco. Has not, 

 as yet, been detected in other localities. 



Remarks. — The typical specimen, from which Dr. Gould drew his description, has the 

 general form and appearance of H. Townsendiana, Lea, from Oregon. That shell, however, is 

 destitute of the minute granulations and black revolving band, and rufous blotches. 



The variety found by Dr. Newberry might, at first sight, be considered another species. It 

 is as globular and conical as the extreme form of H. major of the southern States. Upon 

 careful examination, however, it is found to agree with aeruginosa in all its characteristics. 



15 BB 



