206 BULLETIN OF THE 
Pleurotomella Jeffreysii VERRILL. 
Trans. Conn. Acad., VI. p. 411, pl. 44, fig. 3, 1885. 
Non Pleurotoma (Defrancia) chariessa Watson, Linn. Soc. Journ., London, XV. p. 458, 
1881. 
Non Clathurella chariessa Watson, Chall. Voyage, Zoology, XV. p. 352, pl. 20, fig. 6, 
1886. 
Pleurotomella chariessa Dall, Bulletin U. S. Nat. Mus., No. 37, p. 191, pl. 46, fig. 3, 
1889; this Bulletin, X VIII. p. 122, 1889. 
2 Pleurotomella chariessa var. pistillata Dall, Trans. Wagner Free Inst., III. p. 41, 1890. 
Two perfect, though dead specimens, Station 308, east of George’s Bank, 
in 1,242 fathoms. <A rare species, first dredged by the U.S. F. C. in 1884, 
ranging from east of George’s Bank to Chesapeake Bay, in 984 to 2,620 fath- 
oms ; not living in less than 1,525 fathoms. Mr. Dall records it as far south 
as St. Vincent, in 464 to 966 fathoms, dead. 
In the F. C. collection there is nearly a complete series of this species, 
ranging in length from 10 to 52 mm. Among these there is considerable 
variation in their proportionate lengths. Two specimens, having the same 
number of whorls and the same width, vary in height, one measuring 38 
and the other 43 mm. 
Mr. Dall gives the varietal names spica, phalera, tellea, and aresta, to various 
deviating forms of this species found off the Southern coast. I do not agree 
with him in identifying this with Clathurella chariessa of Watson. That 
species is described as being about 21 mm. in length, and consisting of 10 
whorls in all, of which 4} form the nucleus. It is also said to have 20 
oblique, transverse ribs on the body whorl. <A perfect living young example 
of our species, measuring about 20 mm. in length, has but 4 whorls beside 
the nucleus, and but 15 ribs on the body whorl. 
The figure given by Mr. Watson is certainly quite different from Professor 
Verrill’s, especially in the degree of angularity of the shoulder, obliquity of 
the transverse sculpture, and in the form of the body whorl and canal. 
Pleurotomella sp. 
A badly worn and broken specimen, Station 329, off Cape Lookout, N. C., 
in 603 fathoms. 
This shell bears a superficial resemblance to the young of P. atypha, with 
which it was at first combined, but after a careful study it proves to be quite 
different in detail. The other known species to which I notice its having 
any relation is Leucosyrinx Sigsbeei Dall (this Bulletin, XVIII. p. 76, pl. 11, 
fig. 10, 1889). It is impossible to decide definitely, without careful com- 
parison of more perfect specimens. 
It has a slender, elongated form, with obtusely shouldered whorls; wide, 
oblique subsutural band ; a rather long, narrow aperture, ending in a decided 
