No. of 
U.S.F.C. 
Cat. no. spec. 
sta. 
45,478 4 
2084 
52,317 1 
2571 
153,541 1 
2096 
153,540a 7 
2221 
45,477 27 
2222 
BARTSCH: NEW ENGLAND PYRAMIDELLIDAE. 81 
dredged by the U. S. bureau of fisheries at station 2221 in 1525 fathoms. 
It has twelve whorls remaining which measure: length, 13.5 mm.; 
diameter, 3.9 mm. 
The following specimens have been examined: — 
Depth Disposition of 
Locality. (fms.). Temp. material. 
Off George's Bank 1290 40° U. S. nat. mus. 
S. E. of George's Bank 1356 38° " 
OffMartha'sVin'd, Mass. 1451 37° " 
S. of " " " 1525 36° " 
" " " " " 1537 36° " 
Pyrgiscus Philippi. 
Pyrgiscus PHilippi, Wiegm. Arch., vol. 1, p. 50, 1841,= Pyrgostelis Monte- 
rosato. Conch. Medit., p. 89, 1884, = Ortostelis Aradas, Atti acad. Giov. di 
Catania, vol. 20, 1843. 
Turbonillas having prominent axial ribs and deeply incised spiral 
grooves but no varices or internal lirations on the outer lip; columella 
usually somewhat flexuose. 
Type, Melania rufa Philippi. 
Key to the Species of Pyrgiscus. 
A. Axial ribs evanescent on the base. 
B. Sculpture regular. 
a. Spiral sculpture consisting of incised lines of equal strength between 
the sutures. 
Spiral lines between the sutures 6 verrilli. 
Spiral lines between the sutures 7 to 8 vinecB. 
aa. Spiral sculpture consisting of incised lines of unequal strength 
between the sutures. 
b. Spiral lines equally strong between the sutures excepting those 
upon the shoulder of the whorls which are finer and closer spaced 
than the rest. 
c. Whorls well rounded. , 
Shell slender elegantula. 
Shell robust elegantula branfordensis . 
cc. Whorls almost flat areolata.' 
bb. Spiral lines not equally strong between the sutures, fine lines 
not confined to the shoulder. 
' T. (P.) areolata sometimes lacks the fine striae on the shoulder. 
