292 FOSSIL OSTREIDiE OF NORTH AMERICA. 



in tlie Paleontology of California, Vol. II, page 203. The illustration 

 ■which is given on Plate XXXIX is copied from his figure on Plate 34, 

 Fig. 4, of the volum equoted. 



Ostrca hella Conrad. 



(Plate XXXIX, Fig. 6.) 



This small species was published by Conrad in the report of the 

 United States and Mexican Boundary Survey, Vol. I, p. 156, Plate X, 

 Figs. 4, a, h. It is probably too closely like the form which was named 

 Ostrca elcf/antida by Dr. Newberry to be regarded as a distinct species. 

 See remarks under the head of that name on a following page. 



Ostrea hellarugosa Shumard. 



In his Monographic" du Genre Ostrea, page 69, Professor Coquand 

 gives the name of "0. hellarugosa Shumard." I am not acquainted with 

 the publication of any oyster by that name. It is probably a misprint 

 or a suppositition for 0. hellipUcata Shumard. 



Ostrea belliplicata Shumard. 



(Plate LXXVIII, Figs. 1, 2, 3.) 



Dr. Shumard described this handsome species without figures in the 

 Transactions of the Saint Louis Academy of Science, Vol. I, page 608. 

 I afterward published a description of it with figures in the Annual 

 Eeport of the United States Geological Survey of the Territories for 

 1877, p. 276, Plate IV, Figs. 3, a, h; and Plate 8, Figs. 2, «, 6. This 

 species appears to be quite constant in its form and general characters. 

 All the known examples are from Texas. 



Ostrea blacMi White. 



(Plate XLV, Fig. 1, and Plate XLVI, Fig. 2.) 



This form is of a similar type with 0. belHpUeata, and it is possibly 

 only a variety of that species. Both forms are from the Cretaceous 

 strata of Texas, but I am not aware that they have ever been found 

 associated together. 0. blaclcii is a larger and less ventricose shell and 

 has coarser iilications than 0. bellipUcata. The former was originally 

 described and figured in the Proceedings of the United States National 

 Museum, Vol. II, page 293, Plate 4, Figs. 1, 2. It was also similarly 

 published in the Annual Eeport of the United States Geological Survey 

 of the Territories for 1878, page 11, Plate XIV, Figs. 1, a, b; and Plate 

 XVIT, Fig. 4. 



Ostrea barrandei Coquand. 



(Plate XLIV, Figs. 1, 2; Plate XLV, Fig. 2; Plate XLVI, Fig. 1.) 



This remarkably fine species was published in France by Professor 

 Coquand in his Monographic du Genre Ostrea, page 47, Plate XII, Figs. 



