250 [Dec. 



Remarls. — This is a very graceful form, and is more disposed to grow in 

 bunches or close together, than the other species. I have not met with it 

 with the terminal two cells in twelve specimens of Passalus, which contained 

 over a hundred of the plants, although from some of the individuals appearing 

 truncated at the distal extremity, I think it probable tliat they may occur ; 

 otherwise it would form a distinct genus. 



Cladophytiivi ramosisximiim. Filaments very long, very delicate, and very 

 much branched, growing in fasciculi of moderate density from granular masses. 



Length l-75th in. ; thickness of principal filaments or trunks l-15000th in. 



Habitat. — Growing in moderate profuseness from the mucous membrane of 

 Passalus cornutus. 



New Genus. Corynocladits.* 



Filaments hyaline, inarticulate, very compound; branches thicker than the 

 trunk, clavate, without ramuli, growing from rounded or oval granular masses. 



Corynocladus radiatus. Comatose, growing in very dense bunches, occasionally 

 •traggling ; branches spreading, terminal ones very long, simple, clavate, l-150th 

 in. long. 



Length 1-lOOth in., diameter of trunk 1-10,000 in., branches l-600th in. 



Habitat. — Growing profusely in the ventriculus of Passalus cornutus, from the 

 mucous membrane. 



New Genus. CRYrTODEs.-MA.f 



Filaments ribbon like, growing from attached granular masses. Consisting of 

 a single cell, with a very delicate cell wall, and minute granular contents. 



C. t67inis. Filaments hyaline, compressed, attenuated at both extremities, 

 growing in dense bunches from rounded granular masses. Cell wall very thin 

 and delicate, granular contents of cell very line and indistinct, measuring from 

 l-10,000th in. to 1-GOOOth in., with a few coarser granules, and occasionally a 

 few globules, measuring l-187.5th in. 



Dimensions. Length of filaments l-500th in. to l-75th in. ; greatest breadth 

 l-1700th in. 



Habitat. — Grows in profusion from the mucous membrane of the ventriculug 

 of Passalus cornutus. 



Besides the foregoing, I have found numerous free or floating entophyta in the 

 contents, usually of the posterior part of the alimentary canal, in mammalia, 

 aves, reptilia, pisces, mollusca, insecta, &c. These, at present, I do not feel at 

 liberty to describe as new or peculiar, from my want of acquaintance with cryp- 

 togamic botany. A number of them, I have no doubt, if not peculiar, at least 

 continue to grow luxuriantly in the intestinal canal ; such are various Mycoderma, 

 &c. ; others very probably are swallowed with the food, and pass from the intes- 

 tinal canal unchanged. Numerous drawings of these J exhibit to the Academy, 

 and propose leaving them to future investigation, or to the consideration of cryp- 

 togamic botanists, being a field well worthy of their researches. I also have a 

 number of others, the character of v\hich is peculiarly entophytic : but these I 

 have not yet studied out nor figured, but hope to present descriptions of them to 

 the Academy in a very short time. 



* Kopv>a clava ; KxaJjj. f '^pt>rtT'oj> occultus; fit jjuj^i fascis. 



