Doll Diagnoses of New Species of Mottusks. 175 



smaller size, depressed form and wide umbilicus pervious almost to the 

 apex of the shell. 



Specimens have been obtained from Drake's Bay in 20 fathoms, Mon 

 terey in 15 fathoms, off the Farallones Islands in 37 fathoms, and off Ava- 

 lon, Catalina Island, in about 50 fathoms As Drake was long known to 

 the Spaniards as "El Draco,'* I have named the species draconis in 

 his honor. The type is No. 172,859, U. S. National Museum. 



Macro mphaltna calif ornica sp. nov. 



Shell small, elevated, with a wide umbilicus and whitish color; whorls 

 two and a half, the last much the largest, rounded above with a promi 

 nent suture, below with a wide funicular umbilicus bordered externally 

 by an obtuse carina; surface sculptured axially with numerous coarse 

 oblique threads separated by narrower interspaces and crossed by fine 

 partially obsolete spiral striation; aperture semi-lunate, entire, very 

 oblique; the pillar lip straight, but the whole peristome simple and thin- 

 Height, 5.5; of aperture, 3.5; max. diameter, 5.5 mm. 



The single specimen is not in the best condition, but sufficiently good 

 to show the specific characteristics. The Atlantic species M. depress* 

 Seguenza, is much more delicately sculptured and the shell is of a 

 smaller size. M. califumica is more like M. duplinensis Dall, from the 

 miocene of North Carolina, but the latter is less elevated. The type is 

 No. 109,307, U. S. National Museum. 



Scala sa wince sp. nov. 



Shell small, elongate, sub-acute, with ten or more whorls; nucleus of 

 three smooth polished whorls; subsequent whorls smooth, with about 

 19 low, sharp, slightly reflected varices which entirely cross the whorl; 

 at the shoulder these are slightly spinose; aperture rounded ovate, entire, 

 with a small spine at the shoulder angle and a less conspicuous one at 

 the inner base of the aperture; there is no trace of a basal cord or disk, 

 and no spiral sculpture. Length, 10.5; diameter of aperture, 2.5; max. 

 diameter of last whorl 4.0 mm. A broken specimen with three more 

 whorls seems to have measured 24 mm. in total length when perfect, and 

 8 mm. in diameter. 



This species has been found off the Coronado Islands in 34 fathoms 

 and near Avalon in about 50 fathoms. The type is from 16 fathoms off 

 the isthmus harbor on the south side of Catalina Island, where it was 

 dredged by W. H. Dall, in 1873. It is No. 109,309, U. 8. National 

 Museum. 



