526 
A. E. Verrill — Catalogue of Marine Mollusca. 
The following species should have been inserted on p. 522 : 
Cerithiopsis costulata (Moller) Sars. 
Turritella 1 costulata Moller, Kroyer’s Tidsskr., iv, p. 83, 1842. 
Cerithium arcticum Morch, Prod. Faunae Moll. Groenl., Arctic Manual, p. 127. 
Cerithiopsis costulata G. 0. Sars, op. cit., p. 189, pi. 13, fig. 7, vii, figs. 5, a, b (denti- 
tion), xviii, fig. 28 (operculum). 
A good, living example of this arctic species was dredged by me, 
in the Bay of Fundy, in 1870. 
It may be easily distinguished by the elevated spire, having the 
whorls crossed by regular and strong, rounded ribs, nearly as in 
Scalaria , with a basal carina, in line with the outer lip, and with re- 
volving lines crossing the furrows between the ribs. The canal is 
short, but deeply cut, and slightly recurved. The species recorded 
by Whiteaves as C. costulata from the Gulf of St. Lawrence is not 
this species, but C. Whiteavesii. 
PTENOG-LOSSA. 
Scalaria (Cirsotrema) Leeana Verrill, sp. nov. 
Plate LX VII, figure 34. 
Shell small, slender, elongated, with well-rounded whorls and deep, 
oblique suture, (apex broken). Whorls crossed by numerous 
small, little-elevated, oblique ribs, and on each whorl one large, 
strong, oblique, varix-like rib, those on the three lower whorls nearly 
in one line, the last forming the greatly thickened margin of the lip. 
Both the ribs and the wider intervals between them are crossed by 
very numerous and fine spiral striae. Aperture small, round-ovate, 
surrounded by a much thickened, continuous margin close to the 
edge ; this rim around the outer lip is crossed by oblique striae ; base 
with spiral striae, but without a distinct carina ; no umbilicus. Size 
about the same as the preceding species. 
Off Martha’s Vineyard, station 1038, 146 fathoms, 1881. 
Named in honor of Professor L. A. Lee, of Bowdoin College, and 
of the U. S. Fish Commission party, in 1881. 
Scalaria (Opalia) Andrewsii Verrill, sp. nov. 
Scalaria , undetermined sp., Verrill, Proc. Nat. Mus., iii, p. 376, 1880. 
Plate LVII, figure 35. 
Shell small, slender, elongated, with well-rounded whorls and deep 
suture. Whorls seven, crossed by about thirteen regular ribs, which 
are moderately elevated and evenly rounded and, on the lower 
