A. FE. Verrill—Mollusca of the New England Coast. 255 
with 7. rhysus and T. cgleés Watson and 7. Vaillanti Fischer. 
The first named is fossil in the Pliocene of Calabria and Sicily. The 
recent form has been taken off the European coast, from off the Faroe 
Islands to the Bay of Biscay and Mediterranean, and by the 
Challenger in the West Indies, off St. Thomas. 
The typical specimen of 7. cwgleés Watson, which I have examined, 
although having some resemblance to our shell, differs so much in 
many respects that, considered by themselves, they certainly appear 
to me very distinct species. JI have not seen the fossil 7! Ottoi, 
and am, therefore, unable to express any decided opinion as to the 
identity of the recent and fossil forms, especially as Mr. Jeffreys 
himself admits a considerable amount of variation in respect to the 
sculpture and umbilicus. These forms are doubtless closely allied, 
if not identical. 7: wgleés appears to be nearer our MW. lamellosa, 
* with which Mr. Dall has even united it. 
Cyclostrema Dalli Verrill, var. ornatum, nov. 
Cyclostrema Dalli Verrill, these Transactions, vol. v, p. 513, pl. 57, fig. 39. 
PuaTE XXXII, FIGURE 17. 
Among the specimens of this species there is one from station 2115, 
in 843 fathoms (No. 35,610) which, although agreeing in form and 
condition of the umbilical region with the original type, is very 
peculiarly marked on the base by thin, impressed lines, running 
obliquely and crossing the concentric spiral lines at a large angle, 
so as to produce a sort of “ herring-bone” pattern as shown in our 
figure. This form, if persistent, should undoubtedly receive a varietal 
name. It may therefore be designated provisionally as var. ornatum. 
This species would probably belong to the genus Zharsis, accord- 
ing to Jeffreys’ classification, but as already stated, I doubt the 
validity of that generic division. 
Fissurella Tanneri Verrill. 
Proc. U. 8. National Mus., vol. v, p. 333, 1882. 
PLATE XXIX, FIGURES 13, 13a. 
This species is closely allied to Fissurella redimicula Say,* 
originally described from the Miocene of Maryland. The latter, 
however, judging from three specimens which I have examined, is 
distinct, although it is probably the direct ancestral form from which 
the modern species has been derived. The fossil specimens are 
* Journ. Acad. Nat. Sci. Phil., iv, p. 132, pl. 8, fig. 1, 1824. 
