112 J. J. LISTER. 



the shells of MilioUdce containing young ones; In one several 

 chambers contained young shells, consisting of a nearly spherical 

 chamber and a canal-like second chamber. In the second 

 specimen two young ones, similar to those contained in the 

 other specimen, lay in the terminal chamber. 



In 1878, Schneider (37) described reproductive processes 

 of different kinds in the genus Miliola. 



In one species he found the protoplasm broken up within 

 the shell into bodies of two sizes, of which the smaller were 

 compared with spermatozoa and the larger with ova. Different 

 stages of the development of the "ova" into young Miliolas 

 were found. These became free when invested by a spherical 

 shell. This phase of reproduction was observed in September 

 and October. 



After the winter Miliolas were again found giving rise to 

 young, but now the process appeared to be asexual, none of the 

 spermatozoa-like bodies being found. 



A species of Miliola from Heligoland was kept in vessels of 

 sea- water. After some weeks rounded heaps some 2 millims. in 

 diameter were found at the bottom of the vessel. These were 

 invested by a firm wall covered with sand, and contained several 

 alveolar spaces. In some examples the spaces contained 

 numbers of bodies resembling Euglence in their shape and 

 movement, though no flagellum was observed. In other cases 

 the alveoli contained undivided protoplasm, or they were empty, 

 or they contained young shells, one to each alveolus, which 

 presented some resemblance to young Miliola shells. The 

 further development of these shells was, however, not observed. 

 Schneider's observations require confirmation before they can 

 be accepted. 



In 1879, Lankester (20) described a number of "egg-like 

 bodies" in the protoplasm of Haliphysema tumanowiczii, 

 BowERBANK, having a diameter varying from ^ to j^ inch 

 (51 — l7/i). The larger masses were nucleated, but the smaller 

 were said to be devoid of a nucleus. It was conjectured that 

 these bodies are in some way concerned with reproducbion. 



In the following year, 1880, Munier-Chalmas (24) stated 



