I 



Hood — On the RoUfera of the County Mayo. 687 



with that originally described by Lord. In the latter author's 

 original description, and in the account given on his authority 

 in Hudson and Gosse's Monograph, the animal is said to be 

 devoid of eyes, the dorsal spine to be | the length of the body, 

 and the foot to possess only a single joint. The eyes are 

 exceedingly minute and liable to be overlooked, and the 

 other slight discrepancies may likewise be due to error in the 

 first description. 



Family SAiPiNiniE. 



T)ia&chi%a valga, Gosse. Examples of this species occurred frequently 

 in bog and marsh-pools amongst Utricularia, in the neighbourhood 

 of Westport, 1889, '91, '92. 



L. hoodii, Gosse. Many examples of this species occurred in Castle- 

 bar Lake in 1891 ; a number also in Knappagh Lake, and in a 

 pool on a hill near "Westport, 1891, '92. Miss Glascott (op. cit., 

 p. 68) notes the abundance of this ' rare ' species in Ireland. 



B. pceta, Gosse. A number of examples of this species occurred in 

 the quarry-pool near Westport in 1894. 



D. semiaperta^ Gosse. Numerous in Castlebar Lake in 1891. 



B.fretalis, Gosse. H. and G., Suppl., p. 37, pi. xxxi., 28. I found 

 many examples of this marine species in the lagoon at "West- 

 port Harbour in 1891, '92. 



D. glohata^ Gosse. H. and G., Suppl., p. 37, pi. xxxi., 30. A 

 number of examples in the old quarry, near "Westport, 1892, '94. 



Salpina mucronata, Ehrenb. Erequent in bog-pools amongst 



Utricularia, "Westport, 1892. 

 S. spinigera^ Ehrenb. A few examples of this species occurred in the 



quarry-pond near Westport, 1889, '92. 



S. hrevispina, Ehrenb. Examples were found frequently in Castlebar 

 Lake and Knappagh Lake, 1891, '92, '94. 



8. eustala, Gosse. A number of examples were observed in water 

 from a ditch beside the "Westport Eailway, 1892. 



S. bicarinata, Ehrenb. H. and G., Suppl., p. 38, pi. xxxiii., 30. 



A few specimens in vegetable debris from the lake at Castlebar, 



1891. 

 S. pertyi, Hood. Salpina bicarinafa, E. R. Dixon-Nuttall, J. E. 



E.I. A. PEOC, SEE,. III., VOL, III. 2Z 



