38 A FLORA WITHIN ANIMALS. II. 



diameter, and are provided with very minute, oblique ramuli, about the ^-fa-^ of 

 an inch in length (PI. VIII. 7). 



The thallus of Cladophytum, even at the conjunction of the branches, never 

 presents the slightest trace of articulation. 



Of the development of this plant, or the formation of its spores, I could detect 

 nothing. 



Its mode of attachment is the same as that of Arthromitus. 



The granules of attachment measure from the y-gVg- to the -$-$- of an inch, and 

 often exist in masses the ^ 7 of an inch in diameter. 



Cladophytum grows in all the positions in which Artliromitus is found, and the 

 smallest variety of the former is sometimes observed even growing upon the largest 

 variety of the latter. It is found in the most extraordinary profusion within the 

 ventriculus of Passalus cornutus, attached to the mucous membrane and its hair- 

 like appendages, (PI. VIII. 1; IX.) 



11. DESCRIPTION OF THE GENUS AND SPECIES OF CORTNOCLADUS. 

 CORYWOCI.ADUS, LEIDY. 



Thallus attached by means of one or more granules; filamentous, very compound; 

 branches thicker than the trunk, without ramuli ; inarticulate, amorphous in 

 structure. 



Corynocladus radiatus, 



Proc. Acad. Nat. Sci., Phila., iv., 250. 



(PLATE VIII. Fig. 1 e; IX. Fig. 2 e; X. Figs. 1, 2.) 



Thallus solitary, or growing in more or less dense bunches. Trunk or main 

 stem relatively narrow, variable in length, either dividing shortly after its origin 

 into several principal branches, which subdivide into numerous others, many times 

 longer and thicker than the trunk, and cylindro-clavate in form, and obtusely 

 rounded at the extremities, or gradually subdividing into numerous cylindro- 

 clavate branches, thicker but not longer than the trunk. 



Maximum length the ^ of an inch. Breadth of trunk from the y^^ to 

 the Tsfoir of an inch in diameter. Branches %$-$ to the T ^ 7 of an inch in length, 

 by the 7-^^ to the 7 ^V 7 of an inch in breadth. 



Habitation. Parasitic", observed only growing from the mucous membrane and 

 its appendages of the ventriculus of Rwsalus cornutus. 



12. HISTORY OF CORTNOCLADUS. 



I have never observed the development of this entophyte, nor anything certain 

 in regard to the formation of its spores, although I have noticed a frequent appear- 

 ance of a faint granular substance adhering to the exterior of the clavate branches, 

 which, under a power of 600 diameters, is indistinctly resolved into the form of 

 elliptical masses, resembling sporules (PI. X. 2). 



