76 PALJi: ONTOLOGY OF NEW JEESEr. 



the propriety of recognizing this shell as identical with Dr. Morton's I. Bara- 

 bini, principally on account of the gibbosity of the valves, as Dr. M. says 

 in his description " not ventricose." It is generally considered that his 

 shell was of this form, but Mr. Meek has shown that his figures may be 

 very erroneous ; and, as I have not been able to find Dr. M.'s type speci- 

 mens, I am unable to judge how accurate Mr. Meek's restoration may be. 

 Another individual, more lately obtained, more perfect than the first, shows 

 the undulations narrower than any southern species which I have seen, but 

 the resemblance to 7. Barahini is too near to allow it to be considered 

 as distinct. 



Formation and locality.— In the Lower Green Marls at Holmdel, N. J. 

 From the collection at Rutgers College, New Brunswick, N. J. Another 

 specimen, more lately obtained from Marlborough, by Mr. D'Morg'an, of 

 New York, has been presented to the American Museum of Natural History. 



Inoceramus Sagensis. 

 Plate XIV, Fig. 15, and Plate XV, Figs. 1 and 2. 



Inoceramus Sagensis Owen. Geol. Eept. Iowa, Wis., and Minn., p. 583, PL YII, Fig-. 3. 



Gabb, Synop. Cret. Form., p. 129. 

 J' Sagensis^ var. Nehrascensis (Owen) Meek. Invert. Pal. Geol. Snrv. Territ 



Vol. IX, p. 52. ' 



1. Nehrascensis Owen. Geol. Eept. Iowa, Wis., and Minn., p. ^2, PLYIII, Fig. 1. 



J. Sagensis (Owen) Whitf. Geol. Black Hills, p. 393, PI. YII, Fig. 12. 



Comp. Inoceramus convexus H. & M. Mem. Am. A. A. and Sci., new series, Yol. Y, p. 



386, PI. II. ' 



Comp. Inoceramus convexus Meek. Invert. Pal. Geol. Snrv. Territ., PI. XII, Fig. 5. 

 Inoceramus BalcU M. & H. Proc. A. N. S., Phil., Yol. XII, p. 180. Also Meek, Invert. 



Pal. Geol. Snrv. Territ., PL XY, Fig. 1. 

 Comp. also I Yanuxemi^jid I.proxlmus Meek, J. proximus^ var. circu'aris Meek, and 



Z. confertim-annidatus Koemer. 



Several imperfect casts of Inocerami from different New Jersey locali- 

 ties are before me, all of which, with one exception, are much more nearly 

 allied to L Sagensis Owen than to I Barahini of Morton. The orio^inal 

 form of them has been m.ore or less circular in outline, with a compara- 

 tively long and straight hinge-line and moderately convex valves. The 

 beak is only moderately elevated above tlie hinge-line, and in some cases, 

 especially of the right valve, can scarcely be said to project beyond it. 



