DALL: MOLLUSCA AND BRACHIOPODA. 261 
sinus obsolescent at the suture; canal rather wide, long; operculum wanting. 
Nucleus eroded. Type S. dlanda Dall. 
The characteristic sculpture and form of these little shells is very notable. They 
resemble in miniature Irenosyrinx without the operculum or carinae. If one may 
be permitted to judge from a figure only, the Homotoma producta Bellardi, should 
belong to it. 
Curnvra Bellardi, 1875. Shell solid, short, biconic, the whorls strongly carinate 
at the periphery and flattened toward the suture; anal sulcus wide and deep, close 
to the suture; canal short and recurved ; axial sculpture inconspicuous, opercu- 
lum absent. Type Pleurotoma calliope Brocchi. 
This section is convenient for holding a few species with very marked form 
which, if rounded instead of carinate and with a less constricted suture, might 
easily find a place with Gymnobela. 
BELLARDIELLA Fischer, 1883 (Bellardia B. D. and D., 1882). Shell small, 
fusiform, with axial and subequal spiral sculpture; nucleus having the exposed 
part with a trochoid aspect, and carrying the Siausigera sculpture; subsequent 
whorls rounded, with very distinct suture; anal sulcus at the suture, rather deep, 
leaving an inconspicuous fasciole ; outer lip thin, simple, sharp, much produced in 
arcuate form; pillar simple, obliquely truncate in front, twisted, impervious ; ani- 
mal inoperculate. Type Murex gracilis Montagu. 
It is particularly called to the reader’s attention that the above groups are 
accepted tentatively for the purpose of this paper and that, in so accepting them, 
subject to future revision, no attempt at a new classification or arrangement of 
this family is intended. 
Turris (Surcula) fusinella Datt, n. sp. 
Plate 14, figure 7. 
Shell small, slender, delicate, white with a faint suffusion toward the periphery of 
pale pinkish, with ten or more whorls; spire acute, a little shorter than the aperture ; 
nucleus of three elevated whorls milk-white, glassy, smooth, abruptly changing to 
the adult type of sculpture; fifth whorl with seven, ninth with ten, short axial 
ribs, chiefly visible on the periphery, crossed by two strong spiral cords, more or 
less turgid at the intersections; the whorl above these cords is somewhat exca- 
vated with a nearly smooth surface except for lines of growth and three or four 
spiral threads, more distinct and numerous on the later whorls ; base bordered by 
a prominent cord on which the suture is laid, giving the effect of a presutural ridge 
just behind the anal fasciole ; on the base are about 20 more cords with a tendency 
to alternate in size; the whole surface has minute spiral striae and lines of growth 
which form a microscopic reticulation only visible with a good lens; aperture 
rounded, canal long, slender; body polished and the sculpture eroded; pillar 
white, callous, obliquely truncate in front, slightly twisted, not pervious ; outer 
