214 
PATAGONIAN EXPEDITIONS I PALAEONTOLOGY. 
Fam. MURICIDAi Try on. 
Gen. MUREX L. 
144. Murex hatcheri Ortmann. 
PL XXXIV, Fig. 6. 
1900 M. h . Ortmann, in: Amer. Journ. Sci., v. 10, p. 375. 
Shell ovato-subfusiform. Whorls 5-6, rapidly increasing. Spire short, 
conical. Upper whorls angulated by a prominent, but blunt carina, which 
is situated below the middle of the whorls ; this carina also forms an 
angulation on the last whorl, and, below it, there are 4-5 other carinae, 
ol which the first, or the first and second, are strong, resembling the 
upper carina, while the others are smaller, becoming indistinct toward the 
canal. Upper part of whorls, above the upper carina, flat and obliquely 
descending from the suture, with a few revolving striae becoming indis- 
tinct on the last whorl. Varices 5-6, lamelliform, strong and thick, at 
the points of crossing with the spiral caring produced into short leaf- or 
ear-like lobes, strongest on the uppermost carina, and decreasing in size 
toward the canal. On the upper whorls only the upper row of lobes is 
visible, which become indistinct toward the apex. Mouth large, ovate, 
prolonged into an open canal of medium length, hardly as long as the 
mouth. Outer lip ornamented with 5-6 ear-like lobes, identical with the 
lobes of the varices. 
Height, 63 mm; diameter, 44 mm. 
Remarks: The development of the spiral carinae differs in the two indi- 
viduals at hand. The larger one has only two of them strongly devel- 
oped, the others are small and indistinct, and indicated chiefly by the 
lobes of the varices, which are quite large. In the other individual, these 
two larger carinae are also developed, but below them are about four dis- 
tinct ribs decreasing in size downward. The lobes of the varices are 
indistinct and small in this individual (partly worn off on the whorls), 
but very distinct, although smaller than in the first one, on the margin 
of the mouth. 
As to the resemblance of this species to Urosalpinx pyriformis (v. Ih.) 
see below. 
Record of specimens : San Julian, Darwin Station, 2 sp. 
