56 



ened when old. Nuclear whorl with about 30 delicate transverse 

 ribs. Pale brown. Diameter 12, height 3 mm. 



Animal: color buff-gray, with rather large black dots mainly 

 scattered along the radial grooves of the foot and in a line above 

 the pedal grooves, the mantle maculated with black. Surface with 

 rather coarse radial grooves and sparse reticulation; a fine groove 

 median on tail above, not extending to the foot; foot margin nar- 

 row, closely and evenly crenate; sole unicolored grayish, rugose 

 and distinctly tripartite. Alcoholic specimens measure 10-20 

 mm long. 



Santa Barbara Island, Cal. ; Guadalupe Island, Baja Cal. (G. 

 W. Dunn). 



On the mainland near San Quintin, under plants of Agave 

 Shawii, Baja Cal. (Orcutt). 



676 Bittium attenuattun Carpenter. 

 Straits of Fuca to Monterey, Cal. 



677 B. (Elachista) calif ornicum 



"Shell white, broadly elongate-conic; whorls rounded, falling 

 off more abruptly toward the suture than the summit. The earlier 

 whorls increase less rapidly in diameter, and are more evenly 

 rounded. Base short, well rounded; aperture suboval, effuse and 

 subchannelled anteriorly, with the posterior angle rounded; colu- 

 mella somewhat twisted and slightly revolute. The ornamenta- 

 tion consists of about 14-16 broad and low axial folds, which grad- 

 ually become obsolete on the periphery and base, and on the 

 whorls 3 or 4 impressed spiral lines, which are equally apparent 

 on the ribs and intercostal spaces. This species occurs both recent 

 and fossil in California. Recent shells appear more slender with 

 fewer ribs, 12-14. The type is a fossil specimen from Dead Man's 

 Island, off San Pedro, California, and has eight whorls wfticn 

 measure: long. 5.3, diam. 2.2 mm. A recent shell of 10 whorls 

 measured 6, diam. 2.1 mm." — Dall & Bartsch, Nautilus 15:58-59 

 (S 1901). 



678 Bittium fastigiatum Carpenter. 

 Santa Barbara, Cal. 



679 Bittium munitum Carpenter. 

 Vancouver Island to San Pedro Cal. 



680 Bryophila setosa Carpenter. 



Vancouver Island to Mazatlan; Catalina Isl. (H. Hemphill). 



681 Buccinum compactum Dall. 

 Vancouver Island and north. 



682 Buccinum glaciate Stimpson. 



Alaska — circumboreal? Kadiah Isl. (W. S. Fischer). 



683 Buccinum morchianum Fischer. 

 Vancouver Island. 



684 Buccinum undatum Linne. 



North Atlantic to France and South Carolina. North Pacific 

 to Straits of Fuca. 



685 Buccinum viride Dall. 



Santa Barbara Islands, deep water. 



686 Cadulus aberrans Whiteaves. 



Vancouver Island to Catalina Island, California. 



687 Caecum glabriforme Carpenter. 

 San Diego,? Cal. Mazatlan, Mexico. 



688 Calliostoma eximium Reeve. 

 Lower California, both coasts. 



