46 BUI.I.ETIN 31 4^ 



examining several specimen.s it becomes apparent that the fosset 

 is of the Trinacria type, with more area before the beak than be- 

 hind it, and with vertical, Noetia-Vik.'e: grooving of the bottom. 

 The pit in Limopsis is on the order of the cartilage pit in Peden, 

 showing, at least in good specimens a horizontal sculpturing on 

 the bottom. There is no "hinge area" as in typical Limopsis. 



All our specimens so far as known have come from the Clai- 

 borne sands at Claiborne, Ala. 



The specimens figured were collected by the writer on var- 

 ious occasions at the ''Bluff" and are in the Museum (Paleontol- 

 ogical) of Cornell University. 



Trinacria (Pachecoa) cainei, n. s. gen. andn. sp., PI. 20, Fig. 3, a. 



Definition of Pachecoa. — Shell small, rather thin, and of the 

 general appearance of Trinacvia ovalis, but differing widely from 

 all other species of the genus by having an Area-like exterior rib- 

 bing. 



Specific characterization. — Form, size and appearance as 

 shown by the illustrations and explanations ; ribs about 26-28 on 

 the face of the valve, lacking on post-umbonal slope ; lower mar- 

 gin strongly crenulated by the extremities of ribbing ; ribs hav- 

 ing a tendency to become divided by median line and even bifur- 

 cate toward the umbonal slope or posterio-basal margin. 



Type and speci^nen figured. — Paleont. Mus. Cornell Univ. 



Localities. — Three miles and six miles W. N. W. of Orange- 

 burg, S. C. Collected by two of our former students, Caine and 

 Pacheco, 1899. 



Giycymeris stamina Coprad. PI, 20. Figs. 4-8. 



Pedunculus stamineusCon., A. J. Sci., 1833, (Jan.), vol. 23, p. 342. 

 P. Broderipii Lea, Cont. to Geol., Dec. 1883, p. 76, pi. 3, fig. 53. 

 Axincea stamina Con., A. J. Conch., vol. i, '65, p. 12. 

 Pectunculus Broderipii de Greg., Mon. Faun. Ala., '90, p. 193, pi. 24 

 figs. 2-14. 



Conrad's original description. — Shell suborbicular, ventricose ; with 

 distinct radiating and finer intermediate lines, crossed by minute crowded 

 strise ; inner margin serrate. I^ength one inch and a half. Found with the 

 preceding [at Claiborne.] 



