84 
Gerard R. Case 
Cretaceous of New Jersey and Delaware C. a. lata ranks fourth in order of 
abundance, after Scapanorhynchus texanus, Squalicorax (kaupi and 
pristodontus ), and Plicatolamna arcuata. 
Cretolamna biauriculata (Zittel in Wanner) 
Otodus biauriculata (Zittel in MS) Wanner, 1902:148, PL XIX, Fig. 28. 
Material : — PU 22424, an upper lateral tooth (Figs. 19-20); five other 
teeth, anterior and lateral. Site 1. 
Description : — The teeth are basically similar to those of C. a. lata but 
differ conspicuously in bearing two divergent lateral cusps on either side 
of the central cusp, the outer ones being the smaller. The roots are flat- 
tened, with or without apical foramina, and lack a medial groove or 
furrow such as is found in the Odontaspidae. 
Discussion : — This is the first reported occurrence of C. biauriculata in the 
New World. Its teeth are quite common in the Maestrichtian of Morocco, 
a bit scarcer in Algeria and Tunisia, and quite rare in Israel, where Raab 
(1963:27, PI. 1, Figs. 1-18) claims to recognize C. b. ?maroccana Aram- 
bourg. It is extremely rare in European deposits. 
Cretolamna serrata (Agassiz) 
Otodus serratus Agassiz, 1838, PI. XXXII, Figs. 27-28 
Material : — PU 22425A, an upper lateral tooth (Figs. 23-24), and PU 
22425B, a lower antero-lateral tooth (Figs. 21-22); about two dozen other 
teeth, anterior and lateral, from both upper and lower jaws. Site 1. 
Description : — As described by Cappetta and Case (1975b), the typical 
tooth has two lateral cusps on one side of the central cusp and one lateral 
cusp on the other side. Otherwise the teeth are much like those of 
Cretolamna appendiculata lata. 
Discussion : — Teeth of C. serrata are found only in Late Maestrichtian 
deposits. In North America the species ranges through the Atlantic and 
Gulf Coastal Plains, but has not turned up in the Western Interior nor 
west of the Rocky Mountains. It is quite common in North Africa 
(Morocco). 
Plicatolamna Herman, 1974 
Plicatolamna cf. P. arcuata (Woodward) 
Lamna arcuata Woodward, 1894:198, PI. VI, Fig. 10 
Material : — PU 22426, a lower anterior tooth (Figs. 25-26). Site 1. 
Description : — Tooth of average size, about 1 cm high and 8 mm max- 
