NATURAL SCIENCES OF PHILADELPHIA. 151 



brunnea supra peripheriam, luteo, infra marginata, aufr. tribus visa, 

 regio inferior pallidior ; epidermide nitente, tenuissime malleata rugosa, 

 lincse incrementi sulcis tenuibus sa?pe oblique insculptis ; ruga? obscurse 

 circum umbilicum volventes. Testa junior non subangulata. 

 Diam. maj. 0.75 ad 0.95 ; niin. 0.65 ad 0.80 ; alt. 0.40 ad 0.55 ; axis spirse 

 0.30 ad 0.45 cent. poll. 



Animal pallide griseo-purpurascens, corpore semicylindrico, bis 

 lat. testae requans longitudine, tota superficies tuberculis parvis 

 ellipticis induta; tentacular oculifene tertiam partum long, cor- 

 poris sequantes ; pes postice brevis, cuneatus, alt. corporis latior, 

 margine crenato-incisa. Per testa visiente, partes molles nigrse 

 perspicuse sunt. 



Hah. Montibus " Diablo" California? prope San Francisco, alti- 

 tudine circum 2500 ped. supra mare, inter sylvis quercinis et cu- 

 pressinis, et prope " San Luis Obispo." 



Shell depressed-turbinate, below a little concave, whorls 6|-to 7, 

 umbilicus large, peristome white, expanded, somewhat thickened, 

 above descending ; color j^ellowish-brown, paler beneath, with a 

 dark-brown zone above the peripheiy, margined below by yellow- 

 ish, visible on three whorls; epidermis shining, finely rugose- 

 malleate, lines of growth often obliquely cut by delicate grooves, 

 obscure revolving ridges around umbilical region. Young shell 

 not subangled. 



Animal pale purplish-gray, semicylindrical, its length twice the 

 breadth of shell, its whole surface covered with small elliptic 

 tubercles ; eye-bearing tentacles one-third the length of body ; foot 

 short behind, wedge-shaped, broader than height of body, its 

 margin crenately incised. Intestines seen through upper whorls. 



Hah. " Cedar Mountain," 25 miles southeast of Mount Diablo, 

 California, among oaks and cypresses, thence south to San Luis 

 Obispo, 200 miles. 



The first specimen obtained by Prof. Brewer, " east of Mount 

 Diablo," was too imperfect for me to decide on its characteristics, 

 and the sculpture, somewhat resembling that of the Arionta group, 

 led me to refer it doubtfully to that, while the form and color sug- 

 gested hybridity between A. ramentosa and the nearest of the 

 Lysinoe groups, either L. mormonum or Traskii, neither of which 

 were known, however, to exist within 90 miles of ramentosa. 

 Fresh specimens, lately discovered by the industrious Dr. Yates, 

 among the cypresses of Cedar Mountain, though much smaller, 



