RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 1 3 



Enter obriis,'^ a new genus of Confervaceae. — Simple, attached, 

 isolated filaments consisting of a large cylindrical cell, (containing 

 protoplasma, granules, and large translucent globules enveloped in 

 a primordial utricle,) with a distinct coriaceous peduncle or stipe of 

 attachment, and at length producing at the free extremity one or 

 two, rarely three, shorter cylindrical cells, (filled with the same 

 matter as the parent cell.) 



Enterobms elegans. — Filaments, olive brown, brownish, yellowish, 

 or colorless, at first forming a single spiral turn, and then passing 

 in a straight or gently curved line to the free extremity. Peduncle, 

 or stipe of attachment, adhering very firmly, coriaceous, uniformly, 

 brownish, narrower than the frond cell, papillary, columnar, elon- 

 gated conical or pyramidal, expanded at base and at point of attach- 

 ment to frond cell, marked with longitudinal lines, and frequently 

 with transverse annular constrictions, with no definite interior 

 structure. Length from i -3750th to i -400th of an inch; breadth 

 I -3200th to i-i 666th. Frond cell much elongated, frequently reach- 

 ing the length of 2 or 3 lines, uniformly cylindrical, excepting at free 

 extremity, where it is usually clavate ; breadth in full grown indi- 

 viduals pretty uniformly i-935th of an inch. Contents consisting 

 of a colorless protoplasma, with more or less numerous fine, trans- 

 lucent, yellowish or colorless granules, measuring about i- 15,000th 

 of an inch, and numerous large, colorless, transparent globules or 

 vesicles filled with fluid, averaging the i- 2870th of an inch in diam- 

 eter. End cells only existing in full grown individuals, one, usu- 

 ally two, rarely three in number; the first one cylindrical, i-S6th 

 of an inch in length by i-ioooth in breadth, filled with more gran- 

 ules and less globules than the parent cell ; end cell clavate, i-i35th 

 of an inch long by i-75oth broad, at the clavate end 1-638, filled 

 with granular matter and a few globules. 



Length of full grown individual 2 to 3, sometimes 4, lines. 



Habitat. — Grows from the basement membrane of the mucous 

 membrane of the small intestine oi Jidics ijiarginatus, Say, occasion- 

 ally from the same membrane at the commencement of the large 

 intestine and also from any part of the exterior surface of Ascaris 

 infecta and Aorurus : entozoa infesting these portions of the intes- 

 tinal canal of this animal. 



The youngest individuals of Enterobms which I ever detected 

 measured i -380th of an inch in length b}' i-io6oth in breadth, but 

 the most usual sizes vary from the i-i5oth of an inch to the full 



* Enterobrus : — EvTtpw et ^puw. 



