A CONTRIBUTION TO TIIH GENUS FUSULINA. Ö 



cxpri'ss my urciit übligatioii to Di'. (Jirty wlio wah kind cmoui^li 

 to send mc some specimens of the Foraminiteni, thus enabling 

 nie to verity bis description of tbeni. As I examined tbeir sec- 

 tions under tlie microscope, I was fnlly convinced of tbe correct- 

 ness of bis remarks on tbe i)eculiar structure of tbe form ; yet I 

 am still in doul)t wbetber it is possible to separate satisfactorily 

 tbe .Vnierican form from tbe grou}) of Schwagerina witb a fusi- 

 form sbell, siicli as S. fiisuUnoides Schellwien and S. fusiformis 

 Kkotow. Tbe former, according to Sciiellwien, bas " die grosse 

 Centralkammcr, die Hin- und Herbiegung der Septen, die in der 

 median Ebene nie den Jîoden erreicben, Merkmale welcbe den 

 Fusulinen zukonnnen," wbile Triiicites secalicus possesses, beside 

 these characters, tbe thick septa of a Fiisulina s. s. Therefore, 

 until more important dilterences from Fusulina s. s. and Schtva- 

 gcrind are found, it seems to me unnecessary to keep Triticiles 

 as a distinct genus, or even as a new subgenus.^^ 



In addition to the above, let me remark briefly on some of 

 the characters of Fusulina, which have been treated in detail l)y 

 Möller, Schwaiger and Schellwien. The iirst thing to be 

 noticed among these characters is tbe presence of connecting 

 lamellae, which are found between the septa or between tbe septa 

 and tbe wall. They are somewhat different in nature from tbe 

 ramification of the primary septa, common in Fusulina. The 

 occurrence of these connecting lamellae is very inconstant, and 

 probably of no great significance. I once or twice met with 

 lamellae of this kind in the transverse and longitudinal sections 

 of F. japonica Guembel var. from Tomuro, Asogori, prov. Shimo- 



1) However, 1 nni iiicliiie'l lo believe lliat ;i similar iiaitie will l)e needed in I'nture for 

 llie prototype of Fumlina and Sdum'jei i no , and its direct descendants, if .such really occur. 

 See p. 2L 



