850 CRETACEOUS PALEONTOLOGY. 



upper angle produced backward in a rather slender process. 

 Meropodite subtriangular in section, the upper keel strongly 

 arched, lower keel nearly straight and more strongly serrate, 

 the middle of the very convex outer surface granulose, with two 

 rounded tubercles at the anterior extremity ; the opposite or inner 

 face nearly flat. In all specimens preserved with the members in 

 place, the meropodite is flexed at a right angle with the carpo- 

 podite." (Pilsbry.) 



The dimensions of a propodite are: length, 25 mm.; length, 

 exclusive of finger, 18 mm.; width in the middle, n mm.; thick- 

 ness, 6 mm. ; the dimensions of another specimen are : length, ex- 

 clusive of finger, 29 mm. ; width in the middle, 19 mm. ; thick- 

 ness, 9.5 mm.; the dimensions of a carpopodite are: greatest 

 length, measured obliquely 20 mm. ; length from middle of distal 

 to middle of proximal margin, 14 mm.; width in the middle, 12 

 mm.; length of a meropodite, 13 mm. 



Remarks. "What Callianass faujasi is in Europe to the 

 Maestrichtien, C. mortoni is on this side of the Atlantic to the 

 "Lower Marl" beds. It is an abundant species, known by re- 

 mains of over one hundred individuals, chiefly the propodites 

 only, though sometimes the meropodite, carpopodite and propo- 

 dite are preserved in place; when this is the case, it is usually due 

 to their being more or less imbedded in hard nodules. The 

 abrupt deflection of the hind margin of the more convex face 

 of the propodite, and the downward bend, posteriorly, of its 

 upper margin are characteristic of the species. 



Both chelae of a Lenola individual preserved in one nodule 

 show the right claw to 'be somewhat the larger. Otherwise the 

 two claws seem to be counterparts. I can find no other differ- 

 ence. 



The largest specimens show a shallow, vermiculate wrinkling 

 of the surface, but the smaller are almost smooth to the eye or 

 touch. The crenulation of the margins becomes stronger with 

 age, and is occasionally lost or obscured by chipping of the 

 edges." (Pilsbry.) 



Formation and locality. Merchantville clay-marl, Lenola 

 (163) ; Navesink marl, near Walnford (i48 2 ), Crosswicks Creek 



