DIFPLUGIA LOBOSTOMA. 



47 



stages. There is no conclusive evidence, however, 

 that they do so. The sinuses in the three-lobed 

 or four-lobed mouth of D. lobostoma are deeper and 

 wider than those of the multi-lobed mouth of D. corona, 

 not to mention other disparities in the tests of the 

 two species. 



Fi«. 60.— Difflugia proteiformis Ehrenb. Three aspects of the same 

 individual. ? = D. lobostoma. After Ehrenberg, ' Infns.' t. ix. 

 f. 1 a-c (reduced), x 200. 



In our remarks on D: ohlonga, Ehrenb. reference is 

 made to the uncertainty regarding the particular 

 organism^ to which Ehrenberg apphed the name 

 D. proteiformis. There is more probability of the 

 author having had before him examples of D. lobostoma 

 — judging from his figures — than any other rhizopod. 



61 



63 



® 



Figs. 61-63. — Diagrammatic oral views of the tests of (61) the 3-lobed 

 form of Difflugia lobostoma, (62) D. " tricuspis " (after Carter), and 

 (63) D. gramen. 



Upon the confusion in nomenclature which has arisen 

 Leidy observes (under D. lobostoma) : " As ordinarily 

 seen it [the test] bears so close a resemblance with 

 the corresponding views of D. proteiformis as des- 

 cribed and figured by Ehrenberg, that it may not only 

 be readily taken for the same, but I have suspected that 

 Ehrenberg may have actually had this animal under 



