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; arid, as it lias become necessary to refer to 

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



Leda amblia n. sp. 



U. S. Fish Commission station 4f>17, Monterey Bay. Shell 

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

 rostrate, concentrically and feebly irregularly striatc, 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 

 behind, 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 obscure pallial sinus, very short 

 siphons, 12 or 13 anterior, 18 or 1!) posterior normal hinge teeth, 

 with a narrow, back ward ly oblique socket for the resilium. Lon. of 

 adult shell 18. 0; alt. 9.5; diam. 5.5 ; vertical of the beaks behind 

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

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



Magilia, perattmuata n. sp. 



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

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

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

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

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

 between the periphery 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 other species from 

 the Coast as far as now known. 



Ad mete woodwortki n. sp. 



Monterey Bay, 10-45 fms., Woodworth. Shell small, thin, whitish, 

 with a yellow-brown periostracum, five normal, sculptured, and one 



