30 RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 



Eccrvia moniliforma. — Filaments hyaline or yellowish, forming a 

 double or treble spiral. Peduncle short. Frond cell filled with glob- 

 ules and granules, except toward its free extremity, where it is filled 

 with granular matter divided into distinct and separate masses, usu- 

 ally a little shorter than broad, and containing each a globular nu- 

 cleolated nucleus. Divisions progressively passing towards the end 

 into globular cells with granular contents. Divisions and globular 

 cells from 20 to 50 in number. 



Length from i to i}4 lines, breadth average i- 1500th inch. Di- 

 visions of frond cell contents and globular cells from i-i875th to 

 I- 1 500th inch. Nucleus of cells 1-37 50th inch. 



Habitat. — Grows in moderate quantity from the mucous membrane 

 of the intestine of 50 per cent of Polydesmus granulatus. 



Arthromitiis nitidus. — Filaments very long, hyaline, grows usually 

 in twos or fours, pointed at the origin, rounded at the termination. 

 Articuli very distinct, length equal to the breadth of the filament. 

 Sporuli formed within the articuli, solitary, usually oblique, oval, 

 amorphous. 



Length i line by i-5oooth inch broad. Spores t-y.iiith inch 

 long by I- 1 2.500th inch broad. 



Habitat. — Grows in considerable quantity with a profusion of 

 young Enterobrytis elegans from the mucous membrane of the poste- 

 rior portion of the rectum of Jii/us marginatus. 



Remarks. — Since I established the genus Art/ironiitns'-'' I have 

 observed the formation of its sporuli. These originate in the amor- 

 phous matter of the articuli, apparently by a very gradual aggrega- 

 tion and condensation of the contents. They are always single and 

 usually lie oblique, and frequently alternate with each other in this 

 position in the different articuli. When they first appear they are 

 larger than when fully formed, are frequently bent, or clavate in 

 form, and very indistinct, but as they ripen they become more regu- 

 lar, oval, distinct, and quite refractile of light. Usually they are 

 observed at the extremity of the filaments only, but frequently they 

 are found existing in the whole length of the latter. 



A species of Arthro^nitiis, and also of Cladophyttivi is found in the 

 intestine of Polydesmus virginiensis. 



The Higrocrocis intestiyialis, found by Valentin in the Blatta oricn- 

 talis, I could not find in our domestic cockroach, although I found 

 numerous simple, phytoid, inarticulate filaments, growing from an 

 oxyuris infesting this animal. 



*Proc. Acad,, Oct. 9, 1849. 



