1 62 PATAGONIAN EXPEDITIONS : PAL/EONTOLOGY 



Fam. DELPHINULID^. Fisch. 



Gen. LIOTIA Gray. 

 92. LIOTIA SCOTTI Ortmann. 

 PI. XXX, Fig. io-. 



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 ; i sp. 



Affinities: This species is very closely allied to the recent L. (Lippistes) 

 acrilla Dall (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. TROCHIDsE Ad. 

 Gen. LEPTOTHYRA. 

 93. LEPTOTHYRA PHILIPPI Cossmann. 



PI. XXX, Fig. 9 "' 6 . 

 1899 L. p. Cossmann, in: Journ. Conchyliol., p. 4 (of sep. cop.), pi. 10, f. 



10, II. 



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. 



