125 



In those of the Frog, which are larger, I have seen distinctly in 

 some a nucleus with a nucleolus, in others two nuclei, and in 

 others still, four nuclei of equal size ; showing that here the mul- 

 tiplication of cells occurs as elsewhere, by segmentation of the 

 nucleus. 



" Besides these characteristics, which are sufficient, the fact 

 that I have sometimes met with them in the interior of epithelial 

 cells would be strongly presumptive of their cell origin from 

 minute granules that pass through the cell wall. The represent- 

 atives of the genus Bodo, therefore, appear to be simple cells, 

 each with a filiform appendage for locomotion, which locomotion 

 cannot be of an adaptive character. 



" Specimens differ according as they are taken from different 

 localities ; but since they are cells, capable of considerable vari- 

 ation in shape from dilatation and contraction, such differences 

 should not be made the basis of specific distinctions, particularly 

 as they have no individuality of their own. 



*' In answer to a question, how a Bodo is distinguishable 

 from a Spermatozoon, Dr. Burnett replied, that the former is a 

 cell, the latter the result of a cell, and so far as is known, a solid 

 body. They had been, however, sometimes mistaken for Sper- 

 matozoa." 



Mr. Stimpson presented a paper on the Classification of 

 Acephala, in which he proposed to reverse the usual order 

 of Classification. 



A bottle, containing reptiles from Surinam, was pre- 

 sented in the name of Dr. Cragin, of Surinam. 



Mr. Stodder presented, in the name of Mrs. Stodder, 

 twelve speci mens of Butterflies, collected in Dorchester. 



Mr. T. J. Whittemore presented four species of Cy- 

 clas, namely, C. elegans, C, truncata, C. siinilis, and an 

 undescribed species, from the stream running through 

 Cambridge Meadows. 



Mr. Whittemore remarked, that C. elegans is a beautiful 

 species, which Dekay had described as *' rJio?nioidea.''^ He 

 had received it from Dr. Budd, of New York, who obtained it in 



