24 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I42 



(1938) record the species also from the Pliocene at Santa Inez Point 

 on the east coast of Baja California. 



ANTILLASTER LAMBERTI Jeannet 

 PI. II, figs. 1-2 



Antillaster lamberti Jeannet, 1928, Soc. Paleont. Suisse Mem., vol. 48, p. 36, 

 pi. 4, figs. 14-15. 



Horizontal outline cordate, widest in front of the center; lateral 

 profile strongly inflated above, nearly flat beneath, anterior slope the 

 steeper; transverse profile nearly semicircular. Apical system some- 

 what anterior, at the highest point ; three genital pores, the right an- 

 terior pore not developed. Anterior ambulacrum not petaloid, narrow, 

 in a shallow depression, which is deepest at the margin. Anterior paired 

 petals widely diverging, slightly curved forward, open distally, ex- 

 tending more than halfway down the lateral slopes; pores conjugate, 

 outer pores elongated, inner pores circular; interporiferous zones 

 much wider than the poriferous. Posterior petals somewhat longer 

 than the anterior pair, straight. Peristome surrounded by a floscelle, 

 wider than long, strongly lipped, at the anterior fifth, in a deep trans- 

 verse depression, which covers more than half the width of the test. 

 Periproct submarginal, not visible from above ; on a concave trunca- 

 tion, which slopes downward and forward. Tubercles perforated, 

 larger on the bottom, evenly scattered. No fascioles visible. 



Length of largest of four specimens 103 mm. ; width 99 mm. ; 

 height 75 mm. 



Occurrence. — Venezuela: Sabanas Altas, Falcon (type, fide Jean- 

 net). La Vigia, 10 km. southwest (southeast?) of Pueblo Nuevo, 

 Paraguana district, Falcon (Creole Petroleum Co. 7824). Cerro La 

 Luz near Quebrada Larga, 3 km. west of Pueblo Nuevo (Mene 

 Grande Petroleum Co. B-6295), 



Geologic horizon. — Miocene : Upper part of the "couches d'Ojo de 

 Agua" (type, fide Jeannet). La Vela formation, of late Miocene age. 



Figured specimen. — USNM 638639, from La Vigia. 



Remarks. — Antillaster lamberti shows considerable variation in the 

 degree of inflation and in the depth of the anterior emargination. 

 The periproct of the figured specimen is somewhat distorted; it may 

 originally have been pear shaped. 



