162 
PATAGONIAN EXPEDITIONS I PALAEONTOLOGY 
Fam. DELPHINULIDAd Fisch. 
Gen. LIOTIA Gray. 
92. Liotia scotti Ortmann. 
PI. XXX, Fig. 10" A 
1900 L. s. Ortmann, in: Amer. Journ. Sci., v. 10, p. 372. 
Shell small, rounded, flat above, with a large, open umbilicus below. 
Spire with 4 rounded whorls, increasing rapidly ; suture deep. Last whorl 
with six revolving, equidistant keels, the keel nearest the umbilicus the 
smallest, and disappearing within the umbilicus ; the upper whorls show 
only the two uppermost keels. The keels are crossed by very fine striae, 
and a number (15) of strong radial ribs; at the points of intersection of 
these ribs and the revolving keels there are small conical tubercles. Last 
whorl a little deflected toward the mouth, which is circular and thickened. 
Height, 4 mm ; diameter, 8 mm. 
Remarks: This species has been named in honor of Professor W. B. 
Scott, of Princeton University. 
Record of specimens : Mouth of Santa Cruz River ; 1 sp. 
Affinities : This species is very closely allied to the recent L. ( Lippistes ) 
acrilla Dali (1889, pi. 32, f. 6, 11) from Florida, but the latter has only 
five revolving keels, and the upper side of the shell is a little concave. 
Fam. TROCHIDAE Ad. 
Gen. LEPTOTHYRA. 
93. Leptothyra philippi Cossmann. 
PI. XXX, Fig. 9 “’ b . 
1899 L. p. Cossmann, in: Journ. Conchyliol., p. 4 (of sep. cop.), pi. 10, f. 
10, 11. 
Shell small, subgloboso-conical. Spire short. Whorls convex, suture 
deep. Surface of upper whorls with 6 to 9 revolving ribs, which are ob- 
tusely granulate. Last whorl about % of the height of the shell. Base 
rounded, imperforate. Mouth contracted, circular, very oblique. 
