44 BULLETIN OF THE 



Station 43, off Tortugas, in 339 fins., bottom temperature 45°.0 F. Station 211, 

 off Martinique, in 357 fms., sand. Station 264, off Grenada, in 416 fms., gray- 

 ooze, bottom temperature 42°. 5 F. Atlantic sea-bed, Jeffreys. Off Bermuda, 

 Culebra Island, West Indies, and Pernambuco, in 350 to 1075 fms., mud and 

 ooze, bottom temperature 38°. 2 F., Challenger Expedition. 



I have satisfied myself by a comparison of authentic specimens that the 

 species of Verrill and Brugnone are the same, the former name having pri- 

 ority. The locality, description, and figure of R. peracuta agree well with 

 some varieties of R. nitida, with which it does not seem to have been com- 

 pared. The elevation and the extent of the spiral grooving differ in different 

 individuals, as observed with species of Actceon. 



Although fossil in the Italian Pliocene, this species has not yet been recorded 

 from the so-called Pliocene of America. 



The other species of this interesting group from this region are the recent 

 Ringicula semistriata Orb., R. tridentata Guppy from the Miocene of Jamaica, 

 and two forms from the Florida Pliocene. R. tridentata resembles R. semistri- 

 ata, but wants the striations. The larger Florida species (R. floridana n. s.) is 

 about 1.5 mm. wide and 2.5 mm. long, with five whorls. Its aperture is like 

 that of R. semistriata, but the whole shell is covered with strong spiral grooving 

 with rounded interspaces. There are 12-14 grooves on the last whorl. The 

 Miocene tridentata is smooth and widest ; the Pliocene floridana is narrower, 

 and wholly striate ; the recent semistriata is intermediate in width and half 

 striate. The other form from the Caloosahatchie Pliocene is like R. floridana, 

 except that it has a larger nucleus, four whorls, and is about 1.6 mm. long and 

 1.0 mm. wide. It may be a dwarf race of the other, and for the present will 

 be referred to as R. floridana var. Guppyi. 



Family TORNATINID^. 

 Genus TORNATINA A. Adams. 



This group is credited by Fischer with three subgenera beside the typical one, 

 for the first of which he adopts Utriculus Brown (non Schumacher) for species 

 with an elevated spire, an unchannelled suture, and no plication on the col- 

 umella ; for the second, Coleophysis Fischer, with a truncate and concave apex, 

 the shell attenuated behind with the columella plicate ; lastly, Sao H. & A. 

 Adams, with the shell pyriform, greatly dilated in front, and the columella 

 simple. 



It is not clear to my mind that it would not be better to follow Adams in 

 his original arrangement of the genus, and separate Utriculus, Brown, alto- 

 gether from Tornatina, thus associating with the latter all the Tornatinidcs 

 with a plicate columella, and with the former all those with a simple columella. 

 Thus, for the region under consideration we should have the species arranged 

 as follows : — 



