us A. K Verrill — Molhiaca of the JVetr Engla,nd Coast. 



sex ; among the several specimens of which tlie sex was determined 

 the females have the body-whorl slightly more swollen than the 

 males. 



Length of one of the largest female specimens, 55'"'" ; breadth, 

 26'"'" ; length of body-whoi'l to tip of canal, 40'"'" ; breadth of body- 

 whorl, 22"""; length of spire, 2G'"'" ; length of aperture, 27'""' ; its 

 breadth, 12"'". 



It was taken at the following stations by the Albatross in 1883 : 



Nat. Mu8. No. Station. N. lat. W. long. Fatboms. 



37,824 2,037 38° 53' 00" 69° 23' 30" 1721 12 specimens, mostly livinR. 



37,806 2,038 38 30 30 69 08 25 2033 1 specimen, dead. 



37,814 2,041 39 22 50 68 25 1608 2 specimens, living. 



35,253 2,097 37 56 20 70 57 30 1917 1 specimen, dead. 



35,275 2,098 37 40 30 70 37 30 2221 1 specimen, dead. 



This species is closely allied to P. Agassizli. It is a larger and 

 stouter shell, with the whorls more angulated at the shoulder, and 

 has a broader and more angular aperture. The sculpture differs con- 

 siderably in details, and the columella is destitute of the pink or pale 

 orange tint usuall)' present in P. Agassizii. 



PleurotOmella Benedict! Verrill and Smith, sp. nov. 

 Plate XXXI, figures 2, 2«. 



Shell fusiform, moderately stout, with a high, regularly tapered 

 spire, and very convex, shouldered whorls, which have strong, oblique, 

 transverse ribs rendered nodulous by well developed, raised cinguli. 



Whorls six, below the chestnut-colored nucleus. The suture is deep, 

 not very oblique. The subsutural band is rather broad, concave, 

 nearly smooth, contrasting strongly with the rest of the whorls ; its 

 sculpture consists only of the deeply concave lines of growth, parallel 

 with the notch in the lip. Below the subsutural band the whorls are 

 abrtiptly swollen, forming a rounded shoulder. The transverse ribs, 

 commencing at the shoulder, are prominently raised, rather oblique, 

 and extend entirely across the whorls of the spire, becoming smaller 

 next the suture ; on the last whorl they extend to the base of the 

 canal ; they ai"e obtuse at summit and separated by wider, deeply 

 concave interspaces ; on the last whorls there are about sixteen ribs. 

 Both the ribs and interspaces are crossed by well marked, somewhat 

 unequal, raised, revolving lines, separated by narrow grooves; these, 

 in passing over the ribs, produce small, somewhat conical, unequal 

 nodules, which give a somewhat rough appearance to the surface of 



