144 CHARLES S. PROSSER 



does not say where this paper by Mr. Yabe may be found; but 

 it appears probable that it is the one cited above. If this be correct 

 then the statements by Mr. Yabe touching this question are as 

 follows: "I am still in doubt whether it is possible to separate satis- 

 factorily the American form \Triticites\ from the group of Schwager- 



ina with a fusiform shell Therefore, until more important 



differences from Fusulina s. s. and Schwagerina are found, it seems to 

 me unnecessary to keep Triticites as a distinct genus or even as a new 

 subgenus."' In this paper and preceding ones Dr. Beede and my- 

 self have used the generic names of Fusulina and Schwagerina in 

 the sense in which they are generally used by European and Ameri- 

 can paleontologists who are particularly acquainted with the Paleo- 

 zoic Foraminif era ; not in the sense here suggested by Dr. Girty. 



Dr. Girty cites two other genera, Pseudomonotis and Bakewellia.^ 

 The genus Pseudomonotis does occur in rocks in Kansas considerably 

 older than those which I have considered Permian; but such occur- 

 rence had not been reported when my early papers were published. 

 In regard to Bakewellia Dr. Girty says: "After critically examining 

 the best specimens of Bakewellia which could be obtained I have 

 been brought to entertain serious doubts as to their generic identity 

 with the Bakewellias of the English Permian as represented in King's 

 monograph. The dentition appears to be different and they 

 seem to lack the characteristic series of ligamentary pits." Dr. 

 Beede who has collected and studied a large number of specimens 

 belonging to this type says that " some of the species probably belong 

 to Yakowlew's genus Cyrtodontarca from the Permo-Carboniferous 

 of southeastern Russia, while the others may be closely related to 

 them. The Coal Measures rocks of the world, so far as I am aware, 

 nowhere exhibit the faunal assemblage of these shells and the asso- 

 ciated pelecypods found in these strata in Kansas."^ 



The conclusions of Professor Fritz Freeh as given in his discussion 

 of the line between the Dyas [Permian] and Carboniferous is of decided 

 interest in this connection and corroborative of the views of Dr. 

 Beede. Dr. Freeh wrote as follows, as translated by the late Associate 

 Professor Charles W. Mesloh of the Ohio State University: 



' Loc. cit., p. 5. 2 "The'Guadalupian Fauna," op. cit., p. 43. 



3 Jour. GeoL, Vol. XVII, p. 676. 



