RESEARCHES IX HELMINTHOLOGV AND PARASITOLO(;V. 165 



I observed no iufusorian in Distichopus, but in most of those ex- 

 amined there were found minute Gregarines allied to the Afonocystis 

 of the earth worms, LumbricKs. This parasite was perfectly quies- 

 cent, and was especially remarkable for its frequently containing a 

 variable number of curved elHptical bodies, which I suspect to be 

 spores. Viewing it as a species of Mo7wcysfis, it may thus be briefly 

 characterized : 



Monocvstis Mitis. Cngari/ia Rnchytraei f Kolliker. Body fusi- 

 form, tapering posteriorly and usually acute, anteriorly obtuse or 

 produced into a short mammilla ; contents of the usual granular 

 protoplasm as in gregarines, with a central spherical nucleus and 

 nucleolus. Size ranging from .03 mm. to .12 mm. in length. In 

 the smallest individuals the nucleus was indistinct and in some 

 appeared to be absent. The larger ones mostly contained what I 

 supposed to be spores. These are curved elliptical bodies .015 mm. 

 long by .0045 wide, and were collected in a group of usually two or 

 three to seven or eight, sometimes in advance of the nucleus and 

 sometimes behind it. (Drawing.) The two Anoplophrya above in- 

 dicated have the following characters : 



Anoplophrya Modesta. Lencop/irys. Jour. Ac. Nat.Sc, 1850,49, 

 pi. 2, fig. ry. Elongated elliptical, anteriorly rounded, posteriorly 

 somewhat truncated, usually from three to five times the length of 

 the breadth ; nucleus axial, cylindrical, straight, extending about 

 two-thirds the length of the body ; contractile vesicles variable in 

 number and usually in two longitudinal rows. Ivcngth from .048 

 to . 1 2 mm. ; breadth .018 to .024 mm. In state of tran.sverse division 

 the pairs range from .054 to .15 mm. in length. Common and 

 numerous in the body cavity of E7ichytrcpits verntiadaris. (Drawing. ) 



Anoplophrya Funicidus. — Long, narrow, and ulna-like in shape, 

 from twenty to thirty times the length of the breadth ; anterior 

 extremity slightly wider and very obliquely truncated and slightly 

 depressed ; posterior extremity bluntly rounded. Nucleus axial 

 bristle-like, appearing as a double continued line reaching from the 

 posterior end of the body and tapering to a .sitigle line in the pos- 

 terior part of the .same. Contractile vesicles minute, in two rows, 

 variable in size and usually occupying the posterior part of the body. 

 Length 0.42 to 0.6 mm. by 0.018 to 0.024 mm. wide. Young 

 individuals 0.15 mm. long by 0.024 wide were tapering in front and 

 obtuse, while they were wider and rounded behind. Inhabiting the 

 body cavity of Enchytnsus vvrniicnlaris from the meadows of the 

 Atlantic coast of New Jersey. (Drawing.) 



In an earthworm, Lumbricus, species undetermined and occurring 



