DALL: MOLLUSCA AND BRACHIOPODA. 241 
Scaphander (Sabatina) planeticus Da tt, n. sp. 
Shell small for the genus, creamy white, of about four whorls; spire much more 
exposed than in the majority of species, the edges of all the whorls being visible, 
though in the specimen somewhat eroded ; shell heavy, solid, widest behind, with 
the spire very low and the last whorl with a bluntly rounded shoulder behind 
which it is obscurely flattened; last whorl much the largest; axial sculpture 
starting from the distinct but shallow suture in the form of small arcuate retrac- 
tive wrinkles, about four to a millimeter, which soon become obsolete, being hardly 
visible beyond the shoulder of the whorl; spiral sculpture of conspicuous close 
spiral lines of shallow but distinct punctations, the interspaces being flat and 
polished ; aperture ample, somewhat patulous, outer edge thin and sharp; body 
with a heavy smooth white callus ; pillar arcuate, callous, passing imperceptibly 
into the anterior margin of the aperture ; gastroliths of exactly the same type as 
those of 8. dignarius. Lon. of shell, 8; max. lat., 5.5 mm. 
U.S. 8. “ Albatross,” station 3684 in Mid Pacific, N. latitude 0° 50’, W. 
longitude 137° 54’, in 2463 fathoms, ooze, bottom temperature 35° F. U.S. N. 
Mus. 110,748. 
None of the species with which I have compared this one have the spire ex- 
posed, but it may well be that this is not a character of extreme importance. The 
most conspicuous feature of this species, after the exposed spire, is the anterior 
attenuation of the profile, the main part of the penultimate whorl being in the 
posterior third of the shell. 
CYLICHNELLA Gass. 
Bullina Risso, Hist. Nat. Eur. Mer., 1826, 4, p. 51; not of Férussac, 1822. 
Cylindrella Swainson, Mal., 1840, pp. 185, 326 (not p. 811); not of Pfeiffer, 1840. 
Cylichna Loven, Index Moll. Scand. Occid., May, 1846, p. 10, Ist sp. C. cylindracea 
Pennant. Not Cylichnus Burmeister, Handb. Entom., 1844, 4, 171. 
> Cryptaris Jeffreys, Ann. Mag. N. Hist., 1888, 5th ser., 11, p. 400; not of Lowe, 
1854, nor Reuss, 1865. 
? Mnestia H. & A. Adams, Gen. Ree. Moll., 1854, 2, p. 10. 
> Cylichnella Gabb, Proc. Acad. Nat. Sci. for 1872, Feb., 1873, p. 278 (type Bulla 
bidentata Orb.). 
Bullinella Newton, Syst. List. Edw. Coll., 1891, p. 265. 
Clistaxis Cossmann, Essais Pal. Comp., 1895, p. 90. 
Cyclina Gray, Guide Moll., 1857, 1, p. 195; not of Deshayes, 1850, nor Cyclinus 
Kirby,! Coleoptera, 1887. 
Swainson, in his Malacology, applied the name Cylindrella first to the present 
genus, and secondly to a Cone. In the latter case it may be surmised its use was 
accidental, perhaps a heterophemism for Cylinder. At any rate the latter use is 
1 ince one of these names has to be changed on account of their similarity, I 
would propose for Deshayes’s genus the name Locyclina. 
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