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



L. 3 p. ( ?), Fig. 150, appears to be an undescribed form. 

 Trachelius Shrank. 



Spherical to elliptical ; the anterior end with a dorsally 

 projecting proboscis, at whose base is the closed mouth, 

 which leads into an armed pharynx. Contractile vacuoles 

 numerous ; nucleus central and coinmonly single. Cilia- 

 tion uniform. 

 Tr. sp. (?). The animal shown in Fig. 148 does not agree 

 with any described form, but it comes nearest to this genus. 

 Dileptus Duj. 



Elongated, slightly compressed, with a long proboscis. 

 Mouth at base of proboscis ; pharynx short. Upon the 

 ventral side of the proboscis a row of large cilia extending 

 around the open mouth. Numerous contractile vacuoles 

 along the back. Nucleus ribbon form to bead-like. Stria- 

 tion and ciliation uniform. 

 D. monilatus Stokes, Fig. 157. 

 D. gigas C. & L., Fig. 158. 

 D. sp. (?), Fig. 160. 

 Loxophyllum Duj. 



Flat, leaf-like, with broad hyaline border (sometimes 

 wanting on the left side). Proboscis only slightly devel- 

 oped ; mouth on the left, commonly closed. Trichocysts 

 on the right border either scattered or in papilla-like 

 groups. Contractile vacuole posterior, nucleus ribbon or 

 bead-like. Longitudinally striate. 

 Lox. rostratum Cohn, Fig. 161. 

 Lox. sp. ( ?), Fig. 162. 

 Lox. lamella Ehrbg., Fig. 163. 

 Lox. sp. (?), Fig. 165. 

 Amphileptus Ehrbg. 



Body elongated, somewhat flattened, prolonged in 

 front into an acute proboscis at whose base lies the mouth, 

 which is commonly closed and not visible. Numerous 

 contractile vacuoles scattered over the surface, or a single 

 terminal vacuole. Nucleus single or double. 

 Am. gutta Clap., Fig. 143. 

 Am. sp. (?), Fig. 145. 



