Vol. VII] WARING— STRATIGRAPHIC AND FAUNAL RELATIONS 89 



regularly, tubercles on the lower angle. Localities 4 and 6. 

 Common in the upper Martinez and lower Tejon. L. S. J. U. 

 Pal. Coll. 



This species is probably the same as that figured as T. infra- 

 granulata Gabb."* The true Turritdla infragranulata has a 

 small apical angle, and is found in the upper Tejon. 



Cephalopoda 



Nautilus hallidayi Waring 



PI. 13, Fig. 13 



N. hallidayi Waring, Jour. Geol., vol. 22, no. 8, p. 783-4, 

 Nov.-Dec, 1914. 



Shell large; inner whorls completely enveloped, while last 

 whorl is more evolute; dorsum rounded; aperture elliptical, 

 concave below, where it envelops the early coils. The outer 

 volution has a width slightly less than remaining diameter of 

 shell ; sutures slightly inflected ; shell pearly. The greatest 

 diameter of the figured specimen is 36 mm. It is probably one 

 of the oldest species of true Nautilus known. Locality 4, L. S. 

 J. U. Pal. Coll. 



Named in honor of Mr. T. W. Halliday of Spokane, Wash- 

 ington, the discoverer of this species. 



Pisces. 

 Lamna (?) clavata Agassiz 

 PI. 12, Fig. 6 



L. clavata Agassiz, Bull. Dept. Geol. U. of C, vol. 5, p. 106, 

 fig. 8. 



Unfortunately the base of the specimen is lost so it can not 

 be assigned positively to this genus. The tooth is narrow, 

 flexuous and smooth; inner surface rounded; outer surface 

 slightly convex ; edges of enamel sharp. Locality 4, L. S. J. U. 

 Pal. Coll. 



This species differs from Odontaspis elegans Agassiz in not 

 having the inner face striated. 



" U. S. G«ol. Surv.. 17th An. Rept., pt. 1, p. 1044. pi. 66, fig. 3. 



