Hood — On the Rotifera of the County Mayo. 679- 



N. theodora, Gosse. H. and G., Supplement, p. 21, pi. xxxi., 8.. 

 Two specimens of this beautiful hyaline species were found in 

 Castlebar Lake, 1891. 



Cyrtonia tuha (Ehrenb.) = Notommata tuba, Ehrenb. 

 (Plate XXI., 2, 2a.) 

 Of this rare, trumpet-shaped form, I took three specimens among 

 Sphagnum in a bog-pool near "Westport, July 29, 1892. The 

 drawing of the species, in Hudson and Gosse's Monograph 

 (pi. xvii., 8), is, as Mr. Gosse admits, very unsatisfactory. I 

 have pleasure in submitting detailed drawings, made by Mr. 

 Dixon Nuttall, from a living specimen sent by me from Westport. 

 I cannot help thinking that Miss Glascott's figures of " Notops 

 forcipata, n. sp." {op. c, p. 79, pi. vi., 5), may have been drawn 

 from this species. 



Copeiis ehrenbergii, Gosse = Copeus lahiatus, Gosse, A number of ex- 

 amples of this large species occurred in a bog-pool near Castle- 

 bar, 1891, and among sediment from a small lake a few miles E. 

 of Westport, 1894. 



C. pachyurus, Gosse. I found a large number of this handsome 

 species in a ditch near Castlebar in 1891, and again in 1892 

 among sediment from a lake near Westport, where diatoms and 

 desmids were abundant. It is in such environment that the 

 species is to be found, its food consisting wholly of diatoms and 

 desmids. The motion of this creature is slothful as it creeps 

 along while feeding, but, wishing to change its quarters, it 

 extends its ciliated auricles and swims with a graceful and 

 rapid motion. The male is not described by Gosse in the Mono- 

 graph, but has since been found by Mr. ISTuttall, and described 

 and figured by him in the Journal of the Quekett Club, April,, 

 1894, p. 333, pi. XV. 



C. caiidaius, Collins. I have frequently met with examples of this 

 symmetrical species in the marshes, bog-pools, and lakes near 

 Westport, 1889, '91, '92, '94. 



C. Cerberus, Gosse. A moderate number of specimens were got near 

 "Westport, in localities similar to those inhabited by the pre- 

 ceding species, 1891, '92. 



Proales sordida, Gosse. This species, first described by Mr. Gosse 

 from specimens sent from Dundee by me, was frequently met 

 with in bog-pools and marshes near Castlebar, 1891, and near 

 Westport, 1892. 



