494 CRETACEOUS PALEONTOLOGY. 



Bank (120), near Crawfords Corners (126^), near Walnford 

 (148^), Crosswicks Creek (149, 147^, 195), MuUica Hill 

 (169^); Red Bank sand, Shrewsbury River (119), Red Bank 

 (123) ; Tinton beds, near Ereehold (132). 

 Geographic distribution. — New Jersey. 



Lima monmouthensis (Whitfield). 



Plate LIV., Pig. 9. 



1886. Niicula Monmouthensis Whitf., Pal. N. J., vol. r 

 (Monog. U. S. G. S., vol. 9), p. 102, pi. 11, fig. i. 



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Description. — Shell small, the dimensions of the type specimen 

 being: height, 12 mm.; length, 11 mm.; convexity of one valve, 

 3 mm. Valves oblique, moderately convex, subovate in outline 

 not gaping; hinge-line short, arcuate, edentulous; bealts near 

 the center of the hingle-line, auriculations absent. Surface of 

 valves marked only by faint, concentric lines of growth. 



Remarks. — This little shell was described by Whitfield as a 

 member of the genus Niicula. A further development of the 

 type specimen has shown the entire absence of the nuculoid 

 hinge, and the essential agreement of the shell in all its char- 

 acters with members of the genus Lima. A second specimen 

 in the collection of the Philadelphia Academy of Science, re- 

 ferred to, but not illustrated, by Whitfield is a true Nucula. 

 The species differs from all other members of the genus Lima 

 recognized in the Cretaceous faunas of New Jersey, in the 

 absence of radiating plications, a.nd in the obsolesence of the 

 auriculations. 



Formation and locality. — Wenonah sand, Marlboro' (Whit- 

 field). 



Geographic distribution. — New Jersey. 



Lima sp. undet. 



A single imperfect specimen of what seems to be an 

 undescribed species of Lima occurs in the Survey collec- 

 tion from the arenaceous Navesink bed at Mullica Hill. When 



