236 SCAPHANDRID®. 
imperforate; aperture narrow behind, wide and rounded in front 
outer lip thin, raised above the apex, but hardly alate; inner lip 
thick, callous, with numerous pustules, the axis barely pervious; 
pillar thick, pustular, its outer edge high, with a groove behind it, 
but no umbilical chink. Extreme length of shell 35, maximum 
diameter 20 mill. (Dall). 
This species recalls the more inflated Scaphander niveus Watson, 
from near the Philippines, but is readily distinguished by its more 
attenuated Budla-like form. It may, when older, exhibit a more 
prominent body callus than is shown by our specimen, the granula- 
tion of the pillar being much like that of adolescent specimens of 
Sabatia bathymophila Dall, from the deeper waters of the Antilles. 
(Dall). 
Near the Hawaiian Is., in 295 fms. (Albatross). 
Sabatia pustulosa Dau, Proc. U.S. Nat. Mus., xvii, 1894, p. 677, 
pl. 26, f. 10. 
Genus ATYS Montfort (Vol. xv, p. 261). 
It is evident from the very meager data at hand regarding the 
soft parts of the species grouped under Atys, that at least two or 
three genera will be formed by its disintegration. The dentition of 
typical Atys and of Alicu/a is still unknown. The dentition and ex- 
ternal anatomy of Roxania (see Vol. xv, pl. 61, f. 32, and pl. 59, f. 13) 
and of Weinkauffia (this vol. frontispiece, figs. 10, 11,12) show that 
these belong to two distinct though allied genera. 
Roxania will probably include Roxaniella as a subordinate group. 
Whether Weinkauffia is generically distinct from Atys or Dinia re- 
mains to be seen, the latter being still unknown anatomically. 
Vayssiére has recently (Journ. de Conchyl., 1893, p. 90, pl. 4) ex- 
amined Atys (Weinkauffia) diaphana Arad. & Mag. Part of his 
text and figures are given below. The systematic position of Wein- 
kauffia which he suggests (between Bulla and Haminea) seems to 
me to be wholly untenable. 
ATys DIAPHANA Arad. & Mag. Frontispiece, figs. 8-14. 
Animal with numerous spots of a beautiful brown-red color of 
very diverse forms and irregularly scattered, disposed in three series 
across the shell through which (by its transparence) they are seen. 
Head-shield squarish, with two posterior conic processes, the eyes 
contiguous, near posterior part of head shield; pleuropodial lobes 
