20 THE SPECIES OF 



viduals. In the mature shell the peristome is slightly 

 reflected, and has the remarkable deflection which charac- 

 terizes H. Vancouver ensis and H. concava. 



Found at San Diego by Dr. J. S. Newberry, and in 

 Contra Costa Co. by Mr. J. H. Thomson. The latter 

 gentleman's notes show the animal to be quite distinct 

 from that of H. concava Say, however similar the shells 

 may be, with the exception of the striae on the Californian 

 species. He writes, " Animal uniformly white or flesh- 

 colored, with an orange line on top of back. Solitary 

 or only found in pairs." 



HELIX NEWBERRYANA. 



PLATE LXXVI. FIGURE 7. 



Testa late umbilicata ; orbiculato-depressa ; solida ; striis tenuibus in- 

 crement! et lineis subtilissimis, spiralibus, leviter granulato-decussata ; 

 nigra, aut rufo-brunnea, sub epiderme alba ; sutura valde impressa ; 

 spira depressa ; anfr. 6, regulariter accrescentes, super! plani, ultimus 

 convexus, subtus rotundatus, ad aperturam descendens ; umbilicus latus, 

 perspectivus, anfr. omnes ad apicem monstrans; apertura obliqua, trans- 

 verso-lunaris ; in exemplis junioribus, paries aperturalis, sculptura anfr. 

 prsecedentis callo lev! obliterate,, eleganter notata est lineis elevatis, nu- 

 inerosis, confertis, spiralibus ; in exemplis maturis, haec sculptura occulta 

 est callo incrassato, sed intus in anfr. omnibus remanet ; perist. simplex, 

 acutum, intus callosum, marginibus sub-convergentibus, callo albo con- 

 junctis. 



SYNONYMS AND REFERENCES. 



Helix Newberryana W. G. BINNEY, Proc. Acad. Nat. Sc. of Phila. x. p. 115, 

 Notes, p. 16. May, 1858. 



DESCRIPTION. 



Animal not observed. 



Shell broadly umbilicated ; orbicularly depressed ; solid ; 

 lightly decussated by incremental striae, and numerous 

 fine spiral lines : color black or reddish-brown, under the 

 epidermis white and shining ; suture deeply impressed ; 

 spire depressed ; whorls 6, regularly increasing, the upper 



