CONCHOLOGICAL MEMORANDA. 



No. X. 



[From the Proceediugs of the California Academy of Sciences, June 5, 1872.] 



Description of- a New Species of Mangelia, from California. 



BY ROBERT E. C. STEARNS. 



Mangelia interlirata, Stearns. Shell of a dark reddisli brown, small, solid, 

 slender, fusiform ; whorls, eight, prominently sculptured with 8-10 strong longi- 

 tudinal and 10-12 thread-like revolving ribs, the latter of a darker shade and 

 meeting, but not crossing the former : aperture linear, less than half the lengtli 

 of the shell; outer lip simple, somewhat thickened,, externally and posteriorly, 

 slightly notched ; number of specimens, four, of which two are measurably 

 perfect. The dimensions of the largest is 



Long. -27 ; Lat. -09 inch. 



Habitat, Monterey, California, where the above specimens were found dead on 

 the beach by Mr. Harford and myself. 



A larger and more perfect specimen than either of the four above mentioned, 

 also from Monterey, was given by me to Dr. Cooper, in 1865, for the State 

 Museum, but does not appear to have been described by him. I think that the 

 same form, which is quite rare, has been detected at San Diego by Mr. Hemp- 

 hill, but am not positive. It is with some diffidence that I place it in Mangelia 

 although it seems to accord exceedingly well with the typical figure M. striola 

 ta, of Schacchi. (Vide, Adams's Gen. pi. 10, fig. 10a.) 



