6 PALEONTOLOGY OF NEW JEESEY. 



sands associated with the Terehratula and Gryphcea is composed almost en- 

 tirely of the remains of these minute organisms. Of the species of Brack- 

 iopoda other than the two mentioned, only a few isolated examples have 

 been found. Among all the collections which I have examined, probably 

 not more than fifteen individuals in all have been discovered. The follow- 

 ing described species are all that have been found in any of the marls 

 within the State, including the Eocene beds at the top of the Upper Marls. 



Class BEACHIOPODA. 

 TEREBRATULID^. 



TEEEBEATULA Llhwyd. 



Terebratula Harlani. 



Plate I, Figs. 15-23. 



Terehratula Harlani Morton. Am. eJour. Sci., 1st ser., Yol. XVIII, p. 250, PI. Ill, Fig. 16; 

 and Yol. XYII, p. 283. Jonr. A. :isr. Sci., 1st ser., Yol. YI, p. 73, PI. Ill, Figs. 

 1-4 and 7, 8. Synopsis, p. 70, PI. Ill, Fig. 1, and Pi. IX, Figs. 8 and 9; also 

 Fig. 2. Gabb, Synop. Cret. Form., p. 190. Synopsis of Oret. Brach., 

 p. 18. Meek, Geol. Eept. N. J., 1868, p. 729. 

 T, perovalis (Sow.f) Morton. Jour. A. X. Sci., Phil., Yol. YI, 1st ser., p. 77, 



PI. Ill, Figs. 7 and 8. 

 T, fragilis Morton (not of Schlot.). Jour. A. X. Sci., Phil., Yol. YI, Ist ser., 



p. 75, PI. Ill, Figs. 3 and 4. Synopsis, p. 70, PL III, Fig. 2. Am. J. Arts 

 and Sciences, Yol. XYIII, p. 250, PI. Ill, Fig. 17 and Yol. XYII, p. 285. 

 Meek, Geol. Eept. X. J., 1868, p. 723. 

 T. camella Morton. Synopsis, p. 70, in text. 



T. suhfragilis D'Orb. Prod. Pal., Yol. II, p. 258. 



1\ atlantica (Mort.) Gabb. Synop. Oret. Brach., Proc. A. X. Sci., Phil., 1861, 



p. 18. 



Shell large, sometimes measm^ing two and three-fourths inches in length. 

 Form, elongate-oval with subparallel sides, often giving a somewhat cylin- 

 drical form in old specimens as seen in a dorsal view, with the front usually 

 more or less truncate and sometimes bilobate from a flattening or lobing of 

 the valves on the anterior part of the shell. Valves very ventricose, almost 

 gibbous in old shells from a thickening of the margins. Ventral valve 

 with the beak large, strong, incurved, and truncated at the apex by the 

 large foramen, which is strongly excavated at the opening through the 

 thickness of the shell-substance of the apex, the truncation being parallel 



