6i4 CRETACEOUS PALEONTOLOGY. 



this species, as shown by material in the collection of the National 

 Museum at Washington, is essentially the same as that of Baroda, 

 and the two names are undoubtedly synonymous. Legumen, 

 however, has priority over Baroda and must be adopted for the 

 genus, but it must be transferred from the family Solenidae 

 where it has usually been placed, and placed with the Veneridae, 

 among the excessively elongate forms of that family. 



Pormation and locality. — Merchantville clay-marl, near Mata- 

 wan (loi), near Jamesburg (141), Lenola (163); Woodbury 

 clay, Lorillard (102), Crosswicks (168), near Haddonfield 

 -(183); Wenonah sand, near Marlboro (130); Navesink marl, 

 Atlantic Highlands (108), Crosswicks Creek (149, 195); Red 

 Bank sand, near Middletown (112). 



Geographic distribution. — New Jersey, Alabama, Mississippi, 

 Texas, Arkansas. 



1 



Family PBTRIOOLIDAE. 



Genus Petricoi^a Lamark. 



Petricola nova-aegyptioa Whitfield. 



Plate LXVIII., Fig. 13. 



1886. Petricola Nova-Mgyptica Whitf., Pal. N. J., vol. r 

 (Monog. U. S. G. S., vol. 9), p. 216, pi. 28, fi.g'. 22. 

 Description. — The dimensions of the type specimen are : length, 

 34 mm.; height, 17.5 mm.; thickness, 10 mm. Shell subelliptical 

 in outline; the beaks rather broad but little elevated above the 

 hinge-line, situated about one-fourth the length of the shell from 

 the anterior extremity. Anterior margin broadly rounded ; basal 

 margin gently convex, curving upward more abruptly in front; 

 posterior margin more narrowly rounded than the anterior, the 

 greatest posterior extension apparently below the middle. Valves 

 moderately convex with no distinct umbonal ridge in the cast; 

 the only surface markings indicated on the cast being a few con- 

 centric undulations. The posterior muscular impression of 

 moderate size and sharply defined; the anterior scar inconspicu- 

 ous ; pallial line with a deep rounded pallial sinus extending be- 

 yond the middle of the shell. 



