CEPHALOPODA— AMMONOIDEA. 



177 



297. S. nodosus Owen, and var. brevis Meek. (Fig. 1428.) Cretacic. 

 Large, with sides flattened ; costae bifurcating and increasing by 



Fig. 1428. Scaphites nodosus V3.r. brevis. (After Meek.) 



intercalation, rounded, closely crowded; a strong node on every 

 third to fifth rib near the ventral border of the last whorl; these 



Fig. 1429. Scaphites nodosus va.r. quadrangular is. (After Meek. 



