32 THE NAUTILUS. 



Helix goodalli Miller, 1822, not Helix goodalli Ferussac, 1821, see 

 Man. Concb., XIX, p. 295. 



Bulimus clavulus Turton, 1831, not Bulimus clavulus Lamarck, 

 1822. 



Bulimus pumilus Pfr., 1840. 



NEW SHELLS FEOM THE GULF OF CALIFORNIA. 



BY WILLIAM HEALEY DALL. 



In sorting and labeling a lot of sbells dredged in the Gulf of Cali- 

 fornia near La Paz, in 10-30 fathoms, sandy bottom, the following 

 species were discovered and appear to be undescribed : 



Hindsia perideris n. sp. 



Shell of about ten whorls, the nucleus smooth white of about two 

 whorls, the subsequent whorls (except the last) slowly enlarging, 

 forming a slender acute spire, the last whorl suddenly larger ; 

 sculpture of about six slightly protractive axial ribs, strong and 

 rounded, following each other up the spire in a gently receding 

 spiral, with much wider interspaces, most prominent at the periphery 

 of the whorls, but traceable to the canal ; these are crossed between 

 the sutures by six rounded, subequally spaced spiral threads with 

 much wider interspaces (the space between the posterior thread and 

 the suture widest of all), a little swollen where they override the 

 ribs ; on the last whorl finer intercalary threads appear, and on the 

 canal are seven or eight stronger, spirally striated cords ; aperture 

 subcircular, not lirate within, with a produced, simple peritreme, 

 and behind it a wide, strong, rounded varix over-ridden by the spiral 

 sculpture ; canal short, closed when adult, pointed and strongly re- 

 curved. The color of the shell is mostly yellowish-white, with a 

 basal and sometimes a sutural brownish spiral band, which shows 

 more or less in the interior of the aperture. 



Length of shell 28.5 ; of last whorl 18 ; of aperture 5.6 ; max. 

 diameter of last whorl exclusive of the varix 12.0; including the 

 varix 15.0 mm. 



Type U. S. N. Mus., 96658, from 21 fathoms, others from 27 

 fathoms. 



This shell has much resemblance to Hindsia acuminata Rve., the 



