132 
PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 
turc, but until we know the interior of the shell and the hinge, it is im- 
possible to say whether there are closer relations to any of them. 
Fam. CARDIIDAi Fisch. 
Gen. CARDIUM L. 
57. Cardium phi lippi 1 v. Ihering. 
Pi. XXVII, Fig. 6. 
1887 C. multiradiatum Philippi, Tert. & Quart. Verst. Chiles, p. 178 (pro 
parte, non C. multiradiatum Sowerby). 
1897 C. philippii v. Ihering, in: Rev. Mus. Paul., v. 2, p. 49, pi. 6, f. 40. 
1899 C. ph. var. pauciradiata v. Ihering, in: N. Jahrb. Miner., etc., v. 2, 
P- 15- 
Shell large, subglobular, with about 45 radiating ribs, of which 1 or 2 
near the anterior end are large and geminate. The other ribs are high 
and smooth, those of the posterior end finer and tuberculate. 
Remarks : Our specimens are all badly preserved, but they agree, espe- 
cially those from Santa Cruz, with v. Ihering’ s species, which is, according 
to v. Ihering, different from C. multiradiatum of Sowerby. They seem 
to correspond to the variety pauciradiata. Our best individual shows 
only one geminate rib anteriorly. 
Two casts from Lake Pueyrredon, 600' above base, show distinctly 2 
larger geminate ribs. One of them is very small (about as large as the 
following species), but it is distinguished at once by the smaller number 
of ribs. 
The casts from Arroyo Gio are doubtful : only traces of the ribs are 
seen, which seem to correspond to this species. 
Record of specimens : Mouth of Santa Cruz River, 2 right valves, and 
several fragments ; Arroyo Gio, 2 casts ; east end of Lake Pueyrredon, 1 
cast; Lake Pueyrredon, base of Tertiary, 1 cast; Lake Pueyrredon, 600' 
above base, 6 casts. 
Distribution: Suprapatagonian beds of Jegua quemada, and Patagonian 
beds of Santa Cruz (v. Ih.); Santa Cruz (Phil.). 
