CRETACEOUS FOSSILS. 133 



essential specific detail, are identical, not only among themselves, but with tne 

 present one. This view of the case is rendered still more plausible from the fact 

 that 1 have seen Turritellas from Texas having the crenulated and alternating 

 ribs of these forms, but which differed from all of the descriptions in their exact 

 number and arrangement. 



If these views are correct, Or. Roemer's name, being the oldest, will have to 

 stand, all of the others becoming synonyms; unless, indeed, farther examination 

 should prove that the species is the same as T. Uchauxiana, D'Orb., with which he 

 compares it as follows : " Diese art lasst sich am niichstcn mit Turritella Uchauxiana, 

 D'Orbigny, Pal. Fr., pi. 151, fig. 21-23, vergleichen, jedoch hat diese franztisische 

 Art nur 4 Reihen gekornter spiraler Streifen auf jedeni Umgange wahrend die 

 texanische deren 5 hat." With this species I am unacquainted, and have not, at 

 present, access to any figure or description of it. 



T. Veatchii, 11. 8. 



PI. 20, Fig. 90. 



Shell elongated; whorls increasing very slowly in size ; sides 

 flat, or nearly so; suture impressed, rather distinct. Surface 

 marked by numerous small, longitudinal ribs, crossed by rather 

 variable revolving ribs, sometimes so closely placed that the in- 

 terspaces are merely impressed lines. Lower surface of body 

 whorl convex, marked by revolving ribs similar to those on the 

 side. Aperture ovoid, broadly rounded below ; columellar side 

 most oblique. Outer lip simple ; inner lip heavily incrusted and 

 sometimes faintly striate. 



Length of specimen figured, .75 inch. 



Locality: Tuscan Springs, Tehama County. Collected by Dr. Veatch. 



T. Chicoensis, n. s. 



PI. 21, Fig. 91. 



Shell moderate in size, elongate; whorls numerous (about 

 fourteen, by combining fragments), flattened on the sides, or 

 gently convex; sometimes concave above and convex below; 

 bevelled underneath. Suture impressed, bordered by a rim on 

 the whorl below, and sometimes by one above. Surface marked 



