28 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Chloropeltis 



Body as in Lcpocinclis, but with the longitudinal spirals 

 armed with spines. 

 Ch. hispidula Stein-Eichwald, Fig. 55. 

 Menoidium Perty. 



Colorless, sickle-form, with posterior end rounded ; 

 anterior end prolonged into a neck and obliquely trun- 

 cated. The short side of the body thin and sharp, the long 

 side rounded. Pharynx and vacuole system present, and 

 a posterior nucleus. 

 M. tortuosa Stokes, Fig. 87. This is Atractonema tortiiosa 

 of Stokes, but it appears to differ from Menoidium only 

 in having an acute posterior end. 

 Peranema Duj. 



In the extended condition the body is oval, with a 

 broad, rounded posterior end. Very flexible. A fine 

 spirally marked cuticle. Flagellum very long, broader at 

 its base, and vibrating chiefly at its tip. A mouth opening 

 behind the flagellum which extends into a short, tube- 

 shaped pharynx. A peculiar rod-like organ back of the 

 mouth. Vacuole system at base of the flagellum, and a 

 central nucleus. 



Only one species of this genus has been hitherto 

 described, but the different forms shown below evidently 

 belong to this genus, and show too great variations to 

 warrant putting them under one species. 

 P. trichophorum Ehrbg., Fig. 74. 

 P.sp. (?),Fig. 70. 

 P. sp. (?), Figs. 71 and 71a. 

 P.sp. (?),Fig. 72. 

 Urceolus Meresch. 



In an extended condition body somewhat flask-shaped, 

 with a contracted neck; posterior end rounded; anterior 

 end forming a funnel-shaped peristome from which the 

 flagellum protrudes and which extends into a pharynx 

 reaching to the posterior third of the body. A rod-like 

 organ present as in Peranema. Nucleus and contractile 

 vacuole present. 

 U. cyclostomns ( ?) Stein, Fig. 69. 



