302 REPORT ON ALBATROSS MOLLUSCA DALL. 



eels; the foot is wide and double edged in front, rounded behind; there 

 is a well-marked purpuriferous gland on the dome of the mantle; the 

 penis is very large and of the usual form, with the terminal papilla re- 

 tractile; the gills prominent and normal as well as the osphradium. 



Leucosyrinx tenoceras Da 11. 

 L. tenoceras Dall, Bull. Mus. Comp. Zool., xvm, p. 76. PI. xxxvi, Fig. 5, June, 1889. 



This species, which extends northward to Cape Fear, North Carolina, 

 was collected by the Albatross, at Station 2751, south of St. Kitts, in 687 

 fathoms, ooze ; at Station 2754, east from Tobago, in 880 fathoms, ooze ; 

 and at Station 27G3, 240 miles east by south from Rio Janeiro, in 671 

 fathoms, ooze ; temperatures 37°.9 to 39°.9 F. 



Leucosyrinx Verrillii Dall. 



L. Verrillii Dall (1881), op. cit., xvm. p. 75, PI. x, Fig. 5, 1889. 



This fine species, which has the same northward range as the preced- 

 ing, was found with it at Station 2751, and also at Station 276L, 150 

 miles south from Bahia, Brazil, in 818 fathoms, ooze; temperature 

 38°. 9 F. 



Subgenus PLEUROTOMA s. s. 



Pleurotoma exulans sp. uov. 



Plate v, Fig 7. 



Shell solid, of a yellowish chocolate -brown, strongly sculptured, with 

 eight or nine whorls, the tip eroded in all the specimens ; whorls 

 rounded, the region of the fasciole in front of the closely appressed 

 suture flattish, constricted, and polished ; transverse sculpture in 

 front of the fasciole (on the penultimate whorl) of about fourteen short, 

 stout, obliquely set riblets, which coronate the whorl and do not reach 

 the suture in front; spiral sculpture of rather narrow shallow grooves, 

 separating slightly-raised flattish, rather wider, threads; the last are 

 finest on the fasciole and somewhat coarser near the canal, but toler- 

 ably uniform over the entire surface; notch rather wide, not very deep, 

 rouuded, and half way between the suture and the posterior ends of 

 the peripheral riblets; outer lip thin, simple, produced in the middle; 

 canal rather well defined, not very long; pillar obliquely trimmed off 

 in front, of a creamy brown, with a thin polished glaze ; axis not per- 

 vious; canal rather deep, flaring a little anteriorly. Maximum longi- 

 tude of shell, 32; maximum latitude, 13 mm . 



Operculum elongate pyriform, thin, straight, with an apical mucleus, 

 somewhat concave. 



Hab. — U. S. Fish Commission Station 2808, near the Galapagos 

 Islands, in the Pacific Ocean, in 634 fathoms, coarse sand; bottom tem- 

 perature 39°.9 F. 



