Euchlanidoia.'] INFtJSORTAL ANIMALCULES. 661 



excised in a lunate manner in front, rounded posteriorly; toes 

 somewhat longer than foot. This species resembles in form Lepa- 

 della ovalis (fig. 207) and Squamella hractea, but is distinguished from 

 the former, which has two-toothed jaws and no eyes ; from the latter, 

 •which has foiu- eyes and indistinctly-toothed jaws. Figs. 463 to 465 

 represent different views of this animalcide — viz., back, under, and 

 side, the first and last having the rotary organs extended and in 

 motion. Length 1 -240th. 



l^TOYiDiK acuminata. — Lorica depressed, nearly flat, oval in shape; 

 anteriorly slightly excised, posteriorly pointed. This species re- 

 sembles Colurus, but in that genus the ej^es are very close together, 

 and the lorica open beneath. Found amongst Oscillatoria. (l-240th.) 

 M. triptera. — Lorica oval, triangular, back crested : a section 

 would resemble fig. 443. Found amongst Conferva. (1 -200th.) 

 M. solidus (Gosse.) — Much resembles M. lepadella, but is con- 

 siderably larger ; lorica circular, brilliantly transparent ; a slight 

 puncturing runs round near the edge, like the legend on a coin. 

 Lorica l-150th. 



M. oxysternon. — Resembles M. triptera, but the dorsal keel is much 

 higher and thinner ; the anterior, two-thirds of the ventral surface, 

 form a prominent ridge, terminating abrubtly, like the breast bone of 

 a bird, and the posterior portion is hollowed out remarkably. 

 Viewed laterally, the outline of the back is very gibbous behind. 

 Lorica 1-1 75th. 



Genus Stephanops. TJw diadem or coronet Rotatoria. — Eyes two, 

 in front ; foot furcate ; lorica depressed or prismatic ; the front pro- 

 vided with a hood or diadem. The lorica, in two species, has 

 thorn-like processes posteriorly. In one species a longitudinal muscle 

 is observed on each side (anteriorly), two muscles for moving the foot, 

 and from three to five belonging to the compoimd rotary organ. 

 The oesophageal head has single-toothed jaws, and a short oeso- 

 phagus. One species has a two-partite alimentary canal, the others 

 a simple one ; two species have glands ; an ovarium exists in all ; a 

 contractile vesicle in two. The red eyes are situated on each side, near 

 the frontal head in two species; in one they are yet unknown. 

 The hood remains extended, even when the creature withdraws 

 within its shell. 



