N0.216G. WEST AMERICAN ALECTRIONIDAE—DALL. 579 



varicose, with about 10 short internal lirae; labium smooth with no subsutural 

 callus and no anterior keel on the pillar. Length, 12; diameter, 5; length of last 

 whorl, 8 mm. (Cat. No. 122775, U.S.N.M.) Dredged in Panama Bay in 26 to 

 47 fathoms. This is the smallest species so far on record. 



Genus NASSARINA Dall, 1889. 



Nassarina solida Dall, new species. Shell small, solid, strongly sculptured, short- 

 fusiform, dark brown, with white spots on the ribs in front of the periphery 

 on the last whorl; there are about six rapidly increasing sculptured and three 

 smooth nuclear whorls; sculpture of seven strong rounded axial ribs, obsolete on 

 the base, overrun by, between the sutures, three very strong spiral cords, the most 

 prominent pair being peripheral; the other, just in front of the appressed suture 

 becomes obsolete on the last whorl; the whorl slightly in front of the latter cord is 

 constricted, the constriction corresponding to a prominent callosity, or nodule on 

 the inside of the outer lip; the entire surface is also covered by very fine uniform 

 sharp spiral threads; the canal is short and slightly directed to the right; the aper- 

 ture is small, the labium with a thin coarsely Urate callus and a large subsutural 

 callosity; the outer lip beside the nodosity above referred to has five well-devel- 

 oped denticles and is internally thickened but not varicose. Length, 12; diam- 

 eter, 6; length of aperture including the canal, 5 mm. Near La Paz, Gulf of Cali- 

 fornia, in 8 fathoms. (Cat. No. 274095, U.S.N.M.) 



Genus HINDSIA Adams, 1853. 



Hindsia perideris Dall, 1910. Gulf of California, near La Paz. 



Genus NORTfflA Gray, 1847. 



Northia northiae Gray, 1833. 



This is Buccinum serratum Dufresne, in Kiener, 1834, not of Brocchi, 1814; and 

 B. pristis Deshayes, 1844. It ranges from the Gulf of California to Guayaquil. 



In the proceedings of the United States National Museum, volume 

 26, page 350, I called attention to the fact that no species of Gouldia 

 was yet known from the Pacific coast. Since then the supposed defi- 

 ciency has been supplied by the discovery among some unworked 

 small shells from the Gulf of California of a new species of that genus. 



Genus GOULDIA C. B. Adams, 1847. 



Gouldia californica Dall, new species. Shell small, thin, white, with touches 

 of brown along the dorsal border, ovate-triangular, the anterior lateral tooth 

 large and prominent, the pallial line hardly sinuated; sculpture reticulate, the 

 concentric sculpture more prominent in the middle of the disk, the radial toward 

 the ends of the valves; the inner valve margins smooth. Length, 6; height, 

 5.5; diameter, 3 mm. 



Gulf of California near La Paz, in 21 fathoms. (Cat. No. 211736, U.S.N.M.) 

 This is a smaller and frailer species than either of those of the Atlantic coast. 



