200 Mr. P. H. Gosse on the British Rotifera, 



The species named A. Bowesii in that paper must be cancelled, 

 as it is identical with A. Brightwellii. 



Notommata parasita. 



N. petromyzon. 



N. lacinulata. 



N. collaris (?) . 



N. aurita. 



N. gibba (?). 



N. decipiens. 



N. centrura. 



Synchata pectinata (?). 



S. Baltica. Sea-water : mouth of the Neeze, coast of Essex. 



S. tremula. Leamington. 



S. oblonga (?) . 



S. mordax. Body conical, subventricose : toes minute : auri- 

 cles large, pendent : principal styles four, the larger (or lateral) 

 pair sometimes branched : eye rather small, brilliant : two pairs 

 of protrusile, snapping jaws. Length ygnd inch. 



Polyarthra platyptera. 



Diglena forcipata. 



D. aurita (?). 



D. (?) biraphis. Body oblong, the head and abdomen gently 

 swelling : toes long, slender, straight, and perfectly even in thick- 

 ness : eyes placed close together, frontally : jaws protrusile : ali- 

 mentary canal very large, projecting behind and above the giz- 

 zard, always filled with green matter. Length, including toes, 

 yy^th inch. 



Triarthra longiseta. 



T. breviseta. Body cylindrical : pectoral and caudal spines 

 each about one-fifth of total length and very slender. Length, 

 including foot, T Jjth inch. Leamington. 



Family Euchlanidota. 



Mono sty la cor nut a. 



M. quadridentata. 



M. bulla. Body ovate, inflated, the back very gibbous : lorica 

 plicated along each side with a deep furrow ; the occipital and 

 mental extremities deeply incised. Colour yellowish brown. 

 Length of lorica yyjth inch. 



Mastigocerca carinata. 



Euchlanis luna. 



E. triquetra (?). 



E. deflexa. Body semi-oval : ventral surface of the lorica di- 

 vided longitudinally, and the edges of the fissure bent out at 

 right angles : foot furnished with two pairs of bristles ; toes 

 spindle-shaped. Lorica ^th inch. 



