124 K.J. Bush — Marine Gastropods referred to 



and flattened columellar margin corresponds to this, but there is not 

 the slightest indication of a callus pad found in species of any of 

 those genera. My specimen is somewhat worn, so that it is not at 

 all transparent. 



Vitrinella carinata (d'Orbigny). 

 Rotella carinata d'Orbigny, op. cit., p. 62 ; atlas, pi. xviii, figs. 26-28. 



I have identified two specimens from station 2278, off Cape 

 Hatteras, N. C, in 16 fathoms, as the carinata of d'Orbigny. 



They are minute, semi-transparent, smooth, shining shells, similar 

 in form to the preceding, but having on the body-whorl a distinct 

 peripheral thread or carina which in some positions appears double. 

 The surface under the microscope is marked by delicate lines in the 

 direction of the lines of growth, and on the base by a few inconspic- 

 uous, raised, revolving lines, more distinct in one specimen than in 

 the other. One of the specimens also appears to have an indistinctly 

 flattened sutural area. Umbilicus, aperture, and columellar margin 

 as in Fi diaphana. 



Greatest width, about 1-2™'^; height, about -8""^ 



Vitrinella ? multistriata (Verrill). 



Ethalia multistriata Verrill, these Trans., vi, p. 242, 1884 ; Expl. Albatross, Report 

 U. S. Com. Fish and Fisheries for 1883, p. 568, 1885. Dall, Bull. Mus. Comp. Zool., 

 xviii, p. 361, 1889; Bull. U. S. Nat. Mus., No. 37, p. 160, 1889. 



Plate XXII. tig. 7. Plate XXIII. figs. 4 and 14. 



The specimens (No. 35733) from station 2109, off Cape Hatteras, 

 N. C, in 142 fathoms, which were described by Professor Verrill as 

 belonging to Ethalia, seem much nearer Vitrinella. 



The young specimens are semi-transparent and shining, like V. 

 helicoidea, V. Tryoni, etc., but the more mature ones are somewhat 

 weather-worn and appear quite opaque but have considerable luster. 

 The umbilicus is of moderate size, deep, showing part of the whorls, 

 with the walls somewhat flattened. The aperture is similar in form 

 to that of V. helicoidea, but in the adult the columellar margin is 

 considerably thickened and flattened so that its outer margin is 

 decidedly angulated below, where it joins the outer lip. There is, 

 however, no callus pad covering the umbilical region. 



Rotella anornala d'Orbign}^ (Hist. L'lle de Cuba, ii, p. 64 ; atlas, 



