^ 284 New Species ef; Massachusetts Shells. 
‘epidermis ; aperture | low? no fold on the columnelllit® Ww. 
approaches nearly to the Turitélla bisuturdlis, Say, — 
which, however, is pellucid, with five whorls, suture not 
deeply impressed, is more elongate, and whorls flattened, 
This species may perhaps be referred to Brown's 
genus Pyramis. Specimens with a revolving line on the 
upper side of the whorls, may be regarded as a well 
marked variety. * 
CxnrTHIUM Morir 
Plate IV., fig. 10. 
C. testa dd conicá, elongatà, longitudinaliter rugosá, lineis im 
nulatis c cinctà; anfractibus septemdecim, planulatis; apice 
suturà sub-impressi, ampla; apertura sub-quadratà; labro pectinatos ; 
columella in spiram ductà ; caudá recurvata. 
Description. "Shell conical, dien a regu- 
larly granulated surface, dark. reddish brown; whorls, 
sixteen to seventeen, flattened, with two revolving serios 
of prominent granules at the upper and lower margins, 
and a middle series, nearer to the upper than to the 
lower one, and less prominent, commencing between the 
fourth and eighth whorl from the base, and becoming 
more distinct as it approaches the base; in each series 
the granules are connected by a rather narrow but very 
elevated revolving line, which rises nearly as high as 
the granules, so that in w cimens the appearance 
is of a continuous line moderately dilating into granules ; 
the latter are also connected. by wrinkles extending 
across each whorl ; upper side of the whorls with an 
acute edged carina; apex acute ; suture deeply im- 
pressed, broad ; body whorl. py: terminating with 
a granulous carina ; a ub-thombic, er square, 
= 
