THE NAUTILUS. 39 



the last whorl within the umbilicus runs parallel to the rimation, 

 but does not quite reach to the peristome. The aperture is oblique, 

 peristome thin, well expanded, reflexed below, terminations converg- 

 ing, joined by a rather heavy callus, which bears a large obliquely 

 and narrowly V-shaped parietal tooth, the upper branch connecting 

 with the peristome, the lower branch somewhat sinuous. The upper 

 lip tooth is peripheral, the lower basal, both compressed and entering. 

 There is an acute, obliquely entering ridge within the lip, above the 

 upper lip tooth, and connected with its inner end. Inside the last 

 wliorl a low columellar lamella indicates the position of the external 

 furrow. 



Alt. 4.3, diam. 10, width of umbilicus 3 mm.; whorls 5. 



Tampico, in river debris, coll. by A. A. Hinkley. 



This species is closely related to P. polita, but differs from that by 

 the very long and deep groove on the last whorl within the umbilicus, 

 the thin lip, longer teeth and smaller perforation. Further fresh 

 specimens are needed to complete the descriptions of both, since the 

 types are bleached shells from river debris. 



PALUDESTRINA TAMPICOENSIS n. sp. PI. 5, fig. 13. 



The shell is very minutely perforate or imperforate, rather nar- 

 rowly conic, thin, corneous, nearly smooth, the glossy surface but 

 slightly striatulate ; apex acute. Whorls 6, moderately convex; 

 suture moderately impressed, with a gray margin by transparence. 

 Aperture slightly oblique, ovate, angular above ; lip thin and simple, 

 the columellar margin concave, hardly reflexed. 



Alt. 3.7, diam. 1.8 mm. 



Tampico, in river debris, coll. by A. A. H. 



Of this little species only a few specimens were taken. It is re- 

 lated to P. monroensis Ffld., and is not close to any species yet 

 known from Mexico or Texas. 



MOLLUSCAN FAUNA OF MONTEREY BAY, CALIFORNIA. 



BY S. S. BERRY. 



( Continued from page 55.) 



Conus californicus Hinds. Shore to 12 fathoms. 

 Pleurotoma carpenteriana Gabb. Several individuals of this 



