100 CALIFOKNIA ACADEMY OF SCIENCES. 



Distinguishable from T. cutciieUn by more angular whorls, mammillate apex, 

 more keeled upper edge of whorl, and smaller size. Specimens identified by 

 Dr. Dall. 



Kather common in liie up|)er and lower San Pedro scries at San Pedro, and 

 ill tlie lower San Pedro series at Deadman Island. Found also in the Pleistocene at 

 Spanish Bight, San Diego. The specimen figured is from the lower San Pedro 

 series at Deadman Island, and is now in the collection of Delos Arnold. 



Living. — Monterey to San Diego (Cooper). 



Pleistocene. — Santa Barbara; San Diego (Cooper): San Pedro; San Diego 

 (Arnold). 



147. Tornatina culcitella Gould. 



Plate X, Fio. 3. 



Bulla (Akera) culcitella Gld., Host. Jour. Nat. Hist., Vol. VI, 1853, p. 377, I'l. XIV, fig 8: 



Mex. & Cal. Shells, p. 14, PI. XIV, fig. 8, 1853. 

 Tornatina culcitella Gld., Cpr., Proc. Zool. See, 1856, p. 227. Cpr., Brit. A.s.sn. Rcpt., 1863, 



p. 646. Gabb, Pal. Cal., Vol. II, p. 88, 1869. Cooper, 7th Ann. Rept. Cal. St. 



Min., 1888, p. 268. Keep, West Coast Shells, p. 125, fig. 114, 1892. Williamson, 



Proc. U. S. Nat. Mus., Vol. XV, 1892, p. 195. Tryon, Man. Conch., Vol. XV, p. 189, 



PI. L, fig. 38, 1893. 



Shell small, thin, cylindrical, narrowed posteriorly; spire only slightly elevated; apex acute; 

 whorls four or five, suture appressed, distinct; aperture nearly as long as body-whorl, narrow 

 anteriorly, gradually widening anteriorly to near anterior end, where it quite suddenly retracts to 

 columella; columella with one plait. 



Dimeiisions. — Long. 11 mm.; lat. 5 mm.; body-whorl 10 mm.; aperture 8..S nim. 



Some specimens attain the length of 2.3 mm. 



Common in the upj^er and lower San Pedro series of San Pedro and vicinity. 

 Found also in the Pleistocene at bath-house, Santa Barbara; at Barlow's ranch, 

 Ventura, and at Twenty-sixth Street and Spanish Bight, San Diego. The specimen 

 figured is from the lower San Pedro series at Deadman Island, and is now in the col- 

 lection of Delos Arnold. 



Living. — Monterey to San Diego (Cooper). 



Pleistocene. — Santa Barbara (Cooper) : San Pedro; Santa Barbara; Ventura; 

 San Diego (Arnold). 



148. Tornatina eximia Baird. 



Plate X, Fio. 11. 



Tornatina eximia Baird, Proc. Zool. Soc, 1863, p. 67. Cpr., Brit. Assn. Kept., 1863, p. 647. 

 Cooper, 7th Ann. Rept. Cal. St. Min., 1888, p. 268. Tryon, Man. Conch., Vol. XV, 

 p. 189, 1893. 



Shell resembles T. culcitella, but differs from that species in the following respects: Has a 

 whorl less narrowed anteriorly, a spire depressed nearly to rim of body-whorl, a longer and narrower 

 aperture, and a less prominent plait on the columella. 



Dimensions. — Long. 12.4 mm.; lat. 5.5 mm.; body-whorl 12.2 mm.; aperture 11. 5 mm. 



