the; NAUTILUS. ^ 123 



SOME NEW SPECIES OF MOLLUSKS FROM CALIFORNIA. 



BY WILLIAM HEALEY DALL. 



In assorting some mixed material from California a number of 

 new species were noted; and, as it has become necessary to refer to 

 some of them by name, the following preliminary diagnoses are given. 



Leda ainblia n. sp. 



U. S. Fisli Commission station 4517, Monterey Bay. Shell 

 chalky under a polished dark olive-green periostracum, compressed, 

 rostrate, concentrically and feebly irregularly striate, with obscure 

 microscopic radial lines; lunule narrow, lanceolate; escutcheon, long, 

 wide smooth and slightly concave, the valve margins rising slightly 

 in the median line; valves bluntly rounded in front, bluntly truncate 

 beliind, the rostrate portion not set off from the body by any con- 

 striction, and the radial subangular lines which bound the rostral area 

 are feeble and obscure ; interior whitish, with a deep subumbonal 

 impression, a very shallow and ol)sciire pallial sinus, very short 

 siplions, 12 or 18 anterior, 18 or 19 posterior normal hinge teeth, 

 witii a narrow, backwardly oblique socket for the resilium. Lon. of 

 adult siiell 18.<» ; alt, 9.5; diam. 5.5 ; vertical of the beaks behind 

 anterior end, 7.0 mm. This has mucii the general form of L. leonis, 

 Pali, but wants the prominent sculpture and is of a different color. 



Magilid peratteniKda n. sp. 



Monterey Bay, 10-45 fms., Woodworth. Shell small, very 

 slender, with one smooth turgid nuclear, and six smooth normal 

 whorls; the whorls are but slightly convex, whitish, tlie suture very 

 distinct, its posterior margin slightly overhanging or dominant; aper- 

 ture narrow, short, simple, the outer lip slightly concavely waved 

 between the peri|)hery and the suture, canal short, a little recurved^ 

 relatively rather wide. Lon. of shell 9.5 ; of last whorl 3.75 ; max. 

 diam. 2.5 mm. A single specimen sent by Mr. Woodworth is broken 

 and dead, but its" characters are not shared by any otiier species from 

 the Coast as far as now known. 



Adinete woodworth' n. sp. 



Monterey Bay, 10-45 fms., Woodworth. Siiell small, tiiin, whitish, 

 with a yellow-brown periostiacum, five nornuii, sculptured, and one 



