abstracts: botany 353 



is correlated with the Orangeville formation of Pennsylvania and this 

 name is adopted for it. The upper formation of the Cuyahoga terrane 

 consists of alternating blue sandstones and shales, the latter predominat- 

 ing in thickness, and this one has been named the Royalton from the 

 outcrops in that township to the southwest of Cleveland. The dis- 

 conformity between the Bedford and Berea formations is described and 

 illustrated. This disconformity has been followed from near the Grand 

 River in eastern Ohio west and southwest into central Ohio to the south 

 of Columbus. 



It is shown that the fauna of the Chagrin consists of Chemung species 

 which extend as far west as the western tributaries of the Cuyahoga 

 River, south of Cleveland. For example, in Ashtabula County, which 

 is the northeastern one of Ohio, 29 species and varieties have been identi- 

 fied from the Chagrin, of which 6 are confined to the Ohio formation, 

 leaving 23 for consideration in reference to correlation. Seventeen, or 

 nearly 74 per cent of the above list, are confined to the Chemung forma- 

 tion and every one of the list occurs in the Chemung formation of either 

 New York or Pennsylvania. Ten additional forms are either identified 

 with a ? mark or compared with a species and these are also found in the 

 Chemung, so that 84.5 per cent of the total Chagrin fauna of this county 

 is found in the Chemung formation of New York and Pennsylvania. 

 Consequently the fossiliferous portion at least of the Chagrin formation 

 is regarded as the western continuation of the Chemung formation of 

 New York. 



The bulletin contains a chapter on correlation devoted principally 

 to the formations of the upper Devonian and lower Mississippian. The 

 evidence and literature relating to the line of division between the Devon- 

 ian and Carboniferous systems in northern Ohio is summarized, a 

 question that has recently become one of the most controverted points 

 in the geology of Ohio. The final chapter is devoted to the paleontology 

 of the Chagrin formation, in which a part of its brachiopod fauna is 

 described and illustrated. C. S. P. 



BOTANY. — Le genre Balsamocitrus et un nouveau genre voisin, .-Eglopsis. 

 Walter T. Swingle. Bull. soc. bot. de France, (1911), 58 (Mem 

 8d): 225-245, Figs. A-B, Pis. 1-5, (2 Mar. 1912), (in Chevalier.. 

 Aug., Novitates florae africanse fasc. 4: 225-245). Reprinted in 

 Chevalier, I.e., and separately with original pagination. 

 A study of the material from tropical Africa in Paris, resulted in bring- 

 ing to light two additional species of Balsamocitrus as well as a new 



