THE NAUTILUS. 135 



This is remarkably distinct from any of the previously known 

 West American species. 



Pachypoma magdauena n, sp. 



Sliell conic, tlie sides of tlie spire flattened, the base flattened and 

 somewhat concave, the basal margin compressed with a rounded and 

 undulate edge; whorls about seven ; the nucleus white, worn, sides 

 covered by a scarlet periostracum wliich becomes darker on the 

 base; sculpture of about thirty-four subequal protractive low riblets 

 which are cut into elongate nodules by four spiral sulci, the peri- 

 pheral nodules being longer and most prominent, giving the eft'ect of 

 a pre-sutural band; on the base are four subequal and subequally 

 spaced spiral riblets, which in the young are sometimes nodulous or 

 undulate ; pillar pearly, space about it white or pearly, as is the in- 

 terior of the aperture ; the suture laid on the peripheral carina is un- 

 dulate and in the young the base has a stellate appearance ; the per- 

 iostracum is strongly striate in the direction of growth. Heiglit of 

 shell 38 ; of last whorl 32 ; of aperture (vertical) 5 ; max. diameter 

 38 mm. 



Station 2989, U. S. Fisii Comu.ission, with the preceding, U. S. 

 Nat. Mus. 111239. 



This is of the same general ;;• pe as P. mcsquale Alartyn, but more 

 delicate, smaller and more elegantly sculptured. The operculum is 

 essentially like that of P, incequale, which is not authentically re- 

 ported south of the Santa Barbara Islands. 



With these shells were taken two young specimens of Uvanilla 

 regina Stearns, (unfortunately not containing the soft parts) thus 

 adding another station to the known range of this excessively rare 

 and beautiful species. 



Pachypoma uithopmorum n. sp. 



Shell small, turbinate-conic, with about six moderately convex 

 whorls, the basal margin Ijeing either bluntly rounded or undulately 

 carinate ; suture appressed, whorls covered with a reddish periostra- 

 cum striated in harmony with the incremental lines ; sculpture 

 between the suture and periphery of nine closely and prominently 

 beaded, alternately stronger and weaker spiral cords, with only linear 

 interspaces; peripliery in the type specimen with three finer threads; 

 the base flattish, with six subequal, more or less undulate or beaded 



