554 PROCEEDINGS OF THE ACADEMY OF [DeC., 



A NEW SPECIES OF CYMATOPLEURA. 



BY CHARLES S. BOYER. 



Since the publication of Greville's papers on the Diatomacese but 

 few new forms from the deposit of Barbadoes have been described 

 with the exception of those named by the late Prof. J. Brun in the 

 last number of Le Diatomisie. The deposit, however, is very rich, 

 and Mr. John A. Shulze, of Philadelphia, has not only prepared and 

 mounted the greater number of Greville's rare species, but has dis- 

 covered several new ones. Among these may be mentioned a Cyma- 

 topleura the diagnosis of which follows : 



Cymatopleura shulzei n. sp. 



Valve elliptical-lanceolate, with produced, subcapitate ends; border 

 with moniliform markings. Surface with ten quite definite undula- 

 tions; striae punctate in quincunx. L. of V. 170 />., puncta 14 in 10 /j. 



Barbadoes deposit. Rare. Coll. J. A. Shulze. 



I take pleasure in naming this species after Mr. John A. Shulze, 

 whose preparations of selected diatoms is unexcelled. Cymatopleura 

 is a well-defined genus, but limited in the number of species. Those 

 known as elUptica, solea, regula, hibernica, angulata, cochlea and the 

 three new ones of Pantocsek, kinkeri, gigantea and gracilis, resemble 

 each other in outline, more or less. Lewis' small form, C. marina, 

 differs chiefly in its lanceolate outline. The present species is dis- 

 tinguished by its produced ends and by the fact that it is the only one 

 of the genus thus far found in the miocene deposits (Plate XXVIII). 



I am indebted to Dr. T. S. Stewart for the photographs from which 

 the figures were taken. 



Explanation of Plate XXVTII. 



Fig. 1.— Valve view. X 650. 

 Fig. 2.— Same. X 350. 



Fig. 3. — Zonal view, somewhat inclined, showing moniliform markings and the 

 undulations. X 460. 



