J849.] 227 



No circulatory or other movement as in Achyla prolifera, exists in the cell 

 contents. The end cells of the full grown individuals are usually two in number, 

 and much shorter than the parent cell. Occasionally I have found three end cells, 

 more frequently but one. These cells are formed from the parent cells, by a 

 contraction first taking place in the contents with the primordial utricle, a parti- 

 tion from the permanent cell wall forming afterwards. 



The end cells are probably spore cases; their contents are usually a dense mass 

 of fine granules, similar to those of the parent cell, with a few intermingled 

 globules. I never saw any movement, molecular or other, in the contained mat- 

 ter, except during decomposition. 



A question may arise as to the true situation of this plant among the crypto- 

 gamia. I have placed it in the order Confervaceae, from the diagnosis given 

 by Endlicher, in his Genera Plantarum : " Fila capillaria, membranacea v. fila- 

 mentosa, intus v. extus articulata, simplicia v.ramosa, libera (i. e. baud in fron- 

 dem coalita), interdum tamen reticulatim contexta, viridia v. rarius fusca aut 

 purpurea, in formis infimis hyalina, etc." 



Cladophytum* a neiv genus of etilophyta allied to the Mycodermata. Fila- 

 ments minute, attached by means of a roundish nucleus, sinniple, or com- 

 pounded near the base of attachment, with minute lateral ramuli, inarticulate, 

 and with no evidence of interior structure. 



Cladophytum eomatitm. Filaments delicate, regular, colorless, simple, 

 more frequently branched near the base at very acute angles, growing in 

 more or less dense bunches from a yellowish rounded or oval, attached, nuclear 

 body varying in size from l-7500th to l-600th of an inch. Lateral ramuli very 

 minute, measuring in length from l-15,000thto l-3000thof an inch, and passing otf 

 at acute angles. No indication of articulation or interior structure. 



Length from l-666th to l-120th of an inch. 



Habitat. — Growing more or less profusely from the mucous membrane of the 

 small intestine of Julus marginatus, occasionally from the same surface at the 

 commencement of the large intestine, from any part of the exterior surface of 

 entozoa infesting those cavities, and also from any part of the surface of Entero- 

 brus elegans. 



Arthromitus,\ a second new genus of entophyta, allied to the Mycodermata. — 

 Filaments always simple, cy lindric, articulated, without ramuli, attached by means 

 of a nuclear body, and with no evidence of interior structure. 



Arihremitus eristatus. Filaments delicate, straight or inflected, growing in tufts 

 usually of moderate density, from minute, attached, yellowish rounded or oval 

 nuclear bodies. Articuli short, cylindric, uniform, measuring l-9090th in. in length 

 by 1-15, 000th in breadth, with no traces of interior structure. 



Length l-375th to l-46th of an inch, breadth l-lS.OOOth in. 



Habitat. — Same as Cladophytum comatum, but rarely growing in such dense 

 tufts. 



The three genera of entophyta of which I have now spoken, are all so con- 

 stantly found in the Julus marginatus, that I look upon it as a natural condition, 

 and should I hereafter meet with an individual without them, I will consider it a 

 rare exception, because, in one hundred and sixteen individuals which I have ex- 



* KXado; et ^vfov. t A^^^ov et jittroj. 



