DALL: MOLLUSCA AND BRACHIOPODA. 263 
apparently confined to the periphery: these are crossed by two strong spiral 
threads, the posterior largest and forming oblong tumid nodules at the intersec- 
tions ; the anterior thread is also but less conspicuously nodulous or undulated ; 
the rest of the surface is covered with fine spiral threads, of which there are three 
between the two large ones above mentioned ; the base of the last whorl has fourteen 
coarse spiral threads with one to three finer intercalary threads; anal sulcus very 
deep and wide; outer lip thin, sharp, much produced; pillar smooth, twisted, 
obliquely attenuated in front with an impervious axis; canal long, moderately 
narrow, slightly recurved. Lon. of shell, 29.0; of aperture, 15.5; max. diam. 
-9 mm, 
U.S. 8. “ Albatross,” station 3017, Gulf of California, off Cape Lobos, in 58 
fathoms, mud, bottom temperature 51°.8 F. U.S. N. Mus. 110,601. 
This species belongs to the group of 7. fusinella, from which it differs by the 
obliquity of the ribs and the disparity in size between the peripheral spiral cords, 
which are quite equal and equally nodulous in fusinella. 
Turris (Surcula) notilla Datt, n. sp. 
Shell small, solid, fusiform, the spire acute and slightly longer than the aper- 
ture ; whorls ten, beside the (lost) nucleus, covered with a conspicuous olivaceous 
periostracum ; suture appressed, with a strong spiral cord between it and the 
somewhat excavated anal fasciole which is sculptured by several sharp spiral in- 
cised lines; from the shoulder extend about eighteen slightly protractive axial 
rounded riblets, stoutest at the shoulder, diminishing forward, and extending nearly 
to the canal, with narrower interspaces; these are crossed by about eighteen 
larger spiral cords on the last whorl, seven of which are on the body of the whorl 
and the rest on the beak and canal; the former are turgid where they cross the 
ribs, and in the interspaces have one to three much finer threads; the latter are 
more or less undulate, but have hardly any or no spiral secondary threads; anal 
sulcus, shallow and wide; aperture rather narrow, outer lip produced, thin, 
simple ; pillar lip smooth, whitish; pillar straight, obliquely attenuated in front ; 
canal rather short and wide. Lon. of shell, 26; of aperture and canal, 12; max. 
diam., 9 mm. 
Found with the last-mentioned species. U.S. N. Mus. 110,602. 
This and the following species show characters connecting them with Drillia, 
especially such species as D. alesidota Dall, and D. polytorta Dall, from the 
Carolina coast of the Atlantic. 
Turris (Surcula) dotella Datt, n. sp. 
Shell in general appearance resembling the last species but more acute and 
slender, the ribs only fourteen in number on the last whorl, straighter, sharper, 
with wider interspaces, crossed by, on the body of the last whorl, about a dozen 
similar, regular low ridges with narrower interspaces, the whole regularly and 
