A. E. Verrill — Catalogue of Marine Mollusca. 
463 
with B. decussata , which is somewhat similar in size and form, and 
often occurs in the same localities, but the latter lias more rounded 
whorls and a scarcely turreted spire, the transverse ribs are decidedly 
sinuous, or sigmoid, and more numerous and regular, while the spiral 
lines are raised cinguli, crossing the ribs so as to produce a finely 
cancellated sculpture. 
It also resembles B. Trevelyana of Europe, in form and size. But 
the latter is more regularly and more conspicuously sculptured, and 
the spiral lines are raised cinguli, so that it has a strongly cancellated 
sculpture. The Greenland shell designated as var. Smithii , by Jeff- 
reys (: non Bruit hii Forbes), is, perhaps, identical with our B. incisula. 
His description is very brief. 
Bela tenuilirata Dali. 
Dali. Am. Journ. Conch., vii. p. 98. 187 1. 
Bela simplex Verrill, Proc. U. S. Xat. Mus.. iii. p. 367, 1880, (non Middenrlorff). 
A single immature specimen, referred to this species by Mr. Dali, 
was taken in 1880. Whorls six, including the nucleus, very convex 
and evenly rounded, nearly smooth, but covered with fine and close 
impressed spiral lines, which appear wavy, or subpunctate, and are 
separated by intervals of about equal width ; these are crossed by 
still finer, distinct lines of growth ; subsutural zone smoother, with 
fine curved lines of growth. The apex of the spire is acute; suture 
impressed. The nucleus, consisting of nearly three apical whorls, is 
chestnut-brown ; their surface is finely decussated by equal lines 
running obliquely in opposite directions. 
Aperture large, ovate; canal somewhat prolonged, straight, nar- 
rowed toward the end; sinus, apparently wide and shallow; columella, 
nearly straight. 
The shell is pale flesh-color, covered with a thin, smooth, glossy, 
pale yellowish brown epidermis. Length, 9 mm ; breadth, .5"""; length 
of body-whorl, 7" 1 '" ; of aperture, 6" ,m . 
One dead, but fresh, specimen, from station 894, in 365 fathoms, off 
Martha’s Vineyard. Alaska, — Dali. 
This species is probably not a true Bela, The nucleus is not like 
that of a Bela. It more nearly resembles Plenrotoniella , in several 
respects. 
