
ire A, E, Verrill— Catalogue of Marine Mollusca. 567 
the beak there is a long, raised lateral tooth or lamina, separated 
from the margin by a deep ligamental groove. 
Length of the shell, 3™"; from beak to ventral margin, 2°5"™, 
Off Martha’s Vineyard, station 949, in 100 fathoms, one dead 
specimen, 
If Verticordia and Pecchiolia are to be united, and the latter 
name used for the entire group, as has been done by Jeffreys, in his 
paper last quoted, this species will have to stand as Pecchiolia celata. 
The two genera appear to me sufticiently distinct, however. 
Mytilimeria flexuosa Verrill and Smith. 
Verrill, Amer. Journ. Sci., xxii, p. 302, 1881. 
PLATE LVIII, FIGURE 38. 
Station 947, in 312 fathoms, 1881. One pair of valves, dead, but 
in good condition. 
Kennerlia glacialis (Leach) Carpenter. 
Carpenter, Proc. Zool. Soc. London, Noy., 1864, p. 603. 
Pandora glacialis Leach, Ross’s Voyage, appendix, p. 174. 
Leche, Kong]. Vetensk.-Akad. Handl., xvi, p. 11, pl. 1, figs. 1 a, 6, 1878 (author’s 
copy). 
Kennerlia glacialis Verrill, Amer. Journ. Sci., xx, p. 392, Nov., 1880; Proc. U.S. 
Nat. Mus., iii, p. 397, 1880. 
This differs from the common Clidiophora trilineata Cpr. (= Pan- 
dora trilineata Say), in the absence of the internal radiating ridges, 
in its more inequilateral and irregular form, and in the greater con- 
vexity of the upper valve. The lower valve is very flat, or even 
concave, and is marked externally with several distinct radiating 
lines. 
Living specimens of this arctic shell were dredged at stations 873, 
918, 920, 949, in 45 to 100 fathoms, off Martha’s Vineyard. It had 
previously been recorded from Gaspé, Gulf of St. Lawrence, by 
Whiteaves, and Murray Bay, by Dawson.  Spitzbergen,—Friele, 
Leche. 
Fossil in the Post-pliocene of Saco, Me., and St. John, N. B. 
Pholadomya arata Verrill and Smith. 
Pholadomya arata Verrill and Smith, in Verrill, Amer. Journ. Sci., xxii, p. 301, 
188]. : 
PiaTe LVI, FIGURE 37. 
Stations 940, 949, 950, in 69 to 130 fathoms, 1881, south of 
-Martha’s Vineyard. ‘Three specimens, all dead, but one is very 
fresh. Length, 36™™; height, 29™™; breadth, 26™™, 
