Eachlanidota.] the INFUSORIA. 391 



longer than the foot. The shell resembles C. uncinatus, 

 but the toes are much longer. Found both in fresh and 

 sea water. Length of lorica l-288th. 



679. CoLURUs deflexiis. The winged Colurus. — Lorica 

 ovate, compressed; the shell is more rounded and very 

 transparent. Figures 460 to 462 represent back, under, 

 and side views ; the former shews the vesicles. Found in 

 the clear water of a peaty moor. Length 1 -240th. 



Genus CLXXV. Metopidia. The frontal eyed Ro- 

 taloria have two eyes in front, a furcated foot, and a de- 

 pressed or prismatic lorica, the frontal portion of the body 

 being naked or uncinate (not provided with a hood); indeed 

 they may be termed Lepadella, with two red frontal eyesj 

 the lorica appears to be closed on the under side (testula). 

 Li two species the rotatory organ has from three to four 

 muscles, and in one species two foot muscles are observed. 

 Two species have a frontal hook (respiratory tube), like 

 Colurus. The oesophagal head in one species has two, in 

 another four, but in the third no distinct teeth ; a short 

 oesophagus, and two spherical glands, are present in all. 

 Two species have a distinct constricted stomach {gustero- 

 (Icla). An ovarium is present, and M. triptera has a con- 

 tractile vesicle. 



680. Metopidia lepadella. The flat Metopidia. — 

 Lorica depressed, nearly flat, broadly ovate, excised in a 



lunate manner in front, rounded posteriorly; toes some- 

 what longer than foot. This species resembles in form 

 Lepadella ovalis (flg. 207) and Squamella bractea, but is 

 distinguished from the former, which has two-toothed jaws 

 and no eyes ; from the latter, which has four eyes and in- 

 distinctly-toothed jaws. Figures 463 to 465 represent 



