I/j.6 DALL 



lanceolate area simulating a lunule ; a similar line on the opposite slope 

 within the carina marks a smaller area which may be compared to an 

 escutcheon ; the space between this line and the carina which extends 

 from the beaks to the lower posterior angle of the valves, has the 

 periostracum exceptionally rugose ; and on the carina itself this feature 

 is elevated into a low keel which disappears in drying ; the periostra- 

 cum is concentrically wrinkled and even lamellose toward the margin, 

 with irregular small radial wrinkling; the valves are polished beneath 

 the periostracum, practically smooth, and nearly equilateral, rounded 

 in front, arcuate below and bluntly pointed behind ; the hinge is normal 

 and strong, the pallial impression broad and indented by a narrow 

 linguiform sinus reaching nearly to the vertical of the beaks. Lon. 

 of shell 22.5, alt. 18.5, diam. 13.5 mm. 



This neat little species is perhaps the same as the " Mulinia near 

 lateralis Say " mentioned in Pilsbry's list of the shells obtained by Dr. 

 Rush at Maldonado Bay, Uruguay (Nautilus, xi, p. 8, May, 1897). 

 It is larger and less rostrate than any specimens of AI. lateralis I have 

 seen. The nearest relative I have noticed in the American series of 

 this group is Alulinia portoricensis Shuttleworth, which is pretty close 

 to the present species, though more produced at the ends, and much 

 more rostrate than J/. Branneri. The latter is named in honor of 

 Dr. J. C. Branner of Stanford University to whom the formation of 

 the collection is due. 



Drillia Greeleyi Dall. 



Shell small, stout, solid, acute with eight or nine whorls ; nucleus 

 small, smooth, dark reddish purple with two whorls followed by a third 

 with strong arcuate ribs concave anteriorly, and which at the end of the 

 whorl are replaced by transverse nodules separated from the suture 

 behind by a revolving ridge ; the last whorl has twelve or thirteen 

 narrow transverse ribs, extending forward from the anal fasciole ; be- 

 hind the fasciole a stout ridge revolves a little in advance of the ap- 

 pressed edge of the whorl, the ridge is nodulous where it rides over the 

 ribs of the preceding whorl ; in front of the fasciole the ribs are crossed 

 by two adjacent and four rather distant stout revolving threads, beside 

 which there are four or five smaller threads on the canal, and in the 

 interstices and on the fasciole extremely fine sharp revolving threads ; 

 all the large threads form nodules where they cross the ribs and these 

 nodules are yellow, the shell elsewhere being dark reddish, nearly black ; 

 the last whorl is more than half the shell ; the aperture narrow and 

 dark. Lon. 10.5, max. diam. 4.5 mm. 



