22 BOTANICAL GAZETTE [january 



higher fungi, certain species of the same genus may be sporiferous 

 in a special way, while others are not; or that differences in en- 

 vironment may bring about the sporulation of species which 

 normally reproduce by separated segments only. In the two in- 

 stances under consideration, for example, the individuals do not, 

 like most species of Enterobryus, grow submerged in the more or less 

 fluid contents of the ventriculus, or smaller intestine, in which 

 the food ingested by the host has only partially been digested; 

 and while the species of Hauptfleisch is attached just within 

 the anus, the new form is found growing on the hard external chiti- 

 nous plates about the opening. As far as the possible food relations 

 of these two forms is concerned, the situation seems to be quite 



* 



different, since they come in contact with fecal matters only, which 

 might be supposed to exercise a definite influence on their course 

 of development. It should be mentioned, however, that although 

 I have, in one instance at least, obtained abundant material of 

 what appear to be several species of Enterobryus growing outside 

 the anus of a Passalus from Grenada, B.W.I., none of the indi- 

 viduals, although they are otherwise very similar, show the sporu- 

 lation which is so conspicuous a feature in the new form to be 

 described. 



This form is characterized by the possession of a huge basal 

 cell; its very thick wall often laminate above, filled with a coarsely 

 granular protoplasm, and attached at its base by a well developed 

 sucker-like attachment entirely similar to that of other species of 

 Enterobryus, The primary axis is at first continuous (fig. 47a), 

 but later a terminal segment of considerable length is separated, 

 and at least one more may be similarly formed, as in fig. 476, 

 in which a terminal scar shows very clearly that a segment of this 

 sort has previously been abjointed. Such a condition, were it 

 found within the intestine, would inevitably be regarded as belong- 

 ing to some species of the genus Enterobryus. After one or more 

 of these segments has been abjointed, and as a result of the activity 

 of the denser multinucleate protoplasm at the end of the cell below 

 the scar (fig. 51), a series of flattened cells begins to be cut off, each 

 of which is supplied with a single large nucleus. Soon after these 

 cells, or spore-segments, have been separated, they become ab- 





