140 BULLETIN OF THE 



abundant; Station 2, off Morro Light, Cuba, in 805 fms. ; and off Cape San 

 Antonio, in 1002 fms. Bottom soft ooze, with temperatures between 40° and 

 50° F. where recorded. 



This species, which I was led to think a possible deep-water race of M. avena, 

 is found more or less abundantly in shallow water in South and West Florida. 

 Specimens have been compared with Conrad's type, by the kindness of Mr. 

 G. W. Tryon, Jr., at the Academy of Natural Sciences, Philadelphia. Conrad's 

 species has never been figured in a satisfactory manner. The figure we give 

 represents, considerably enlarged, a rather blunt-tipped deep-water specimen. 

 They vary somewhat in the height and acuteness of the spire. The color is 

 usually light fawn or amber of the yellow shade, or a mixture of the two with- 

 out color pattern. I have from Florida some small pure white specimens which 

 are only differentiated by color and size from the typical form, though the ab- 

 sence of color gives them quite a distinct aspect. This species as a whole is 

 distinguished from M. Redfieldii Tryon, by its more flexuous and callous outer lip 

 and wider aperture; from M. torticula, by its greater width and straight axis; 

 from the Volvarina group, by the higher spire and posteriorly angulated outer 

 lip. The deep-water form is larger and less pellucid than those found in shal- 

 low water, but hardly distinct enough to retain a separate name. Mr. Tryon 

 unites this with nitida Hinds, described in 1844 without locality. I confess 

 myself unable to see the exact correspondence between them which he men- 

 tions, even by his own figures. The color and form seem to me quite as 

 different as in any two valid species of the same group. If nitida is to sup- 

 plant a later name, it would seem that Marginella paxillus Reeve is much more 

 like M. nitida than is Conrad's species. The species described by Hinds is of 

 a deep brown, like the dark varieties of M. opalina Stearns. In looking over 

 a great many specimens which have come to me, I have never seen a specimen 

 of M . succinea of this color, though, knowing how variable this section of the 

 genus is in its coloration, there seems to be no reason why it should not 

 occasionally be of a dark color. 



Marginella styria n. e. 



Shell slender, extremely lucid, glassy or colored by the soft parts showing 

 through ; whorls four and a half; spire conical, rounded, and rather blunt; 

 suture visible, whiter than the rest of the shell, being thicker and more opaque; 

 shell subfnsiform, the convexity of the left side somewhat greater than that 

 of the right; aperture very narrow; outer lip hardly thickened, produced 

 and impressed toward its middle part; columella four-plaited, without callus ; 

 aperture less than two thirds the length of the shell. Length of shell, 5.55; of 

 aperture, 3.50; greatest width of shell, 2.00 mm. 



Habitat. Dredged near Sombrero Island, in 54 fms., also at Station 5, in 

 229 fms., with the preceding. 



This little shell has somewhat the shape of Marginella torticula in miniature, 



