52 



Messrs. Brady and E-obertsoii on the 



2. East of Ireland (freshwater). 



Grand Canal, Dublin. 



Cypris reptans (Baird). 



gibba, Ramdohr. 



ovum (Jurme). 



compressa, Baird. 



Cypridopsis obesa, B. ^ R. 



vidua (Miiller). 



Oandona Candida (Miiller). 



compressa, Koch. 



lactea, Baird. 



similis, Baird. 



Limnicythere inopinata {Baird). 

 Darwinella Stevensoni, B. ^ JR. 



Belfast Canal. 



(Lock at Junction of River Logan.) 



Cypridopsis obesa, B. 8f R. 

 Cythere castanea, G. O. Sars. 



porcellanea, Brady. 



gibbosa, B. 4* B. 



viridis, Miiller. 



Loxoconcha impressa {Baird) , 

 Cytherura Robertsoni, Brady. 



Candona similis^ Baird. PI. I. figs. 1, 2. 

 Candona similis, Baird, Brit. Entom. p. 162, pi. 19. figs. 2, 2 a. 



Carapace subelliptical, greatest height in front of the mid- 

 dle, and scarcely equal to half the length ; extremities well 

 rounded, the posterior much the smaller : superior margin 

 very slightly arched, sloping gently from before backwards ; 

 inferior almost straight. Seen from above, regularly ovate, 

 widest in the middle, thence tapering evenly to the acumi- 

 nate extremities ; width equal to rather more than one- 

 third of the length. Shell thin, transparent. Length -3^5 

 inch. 



This species is known to us only from two or three speci- 

 mens taken in the Grand Canal at Dublin ; but these agree so 

 completely (except as regards the coloured markings, which 

 may have been destroyed by prolonged drying amongst mud) 

 with Dr. Baird's description that we do not hesitate to refer 

 them to G. similis. Since the foregoing sentence was written 

 a few specimens of the same species have likewise occurred 

 to us in the neighbourhood of Sunderland, as noted below 

 (p. 58). 



3. Northern Coast of Scotland (marine). 



For several dredgings from this district, obtained during one 

 of the surveying-expeditions of H.M.S. 'Porcupine,' we are 

 indebted to our friend Mr. D. O. Drewett. The dredgings are 

 from the following localities (all purely marine, and very si- 

 milar in character, so that it is scarcely necessary to give se- 

 parately the lists of species from each) : — Dornoch Frith, 

 4 fathoms ; Loch Erribol ; three miles off Port Skerran, 

 30 fathoms ; Kyle of Tongue, 4 fathoms ; Scarpa Bay, Ork- 

 ney; Scarpa Flow, 17 fathoms; ten miles off Hoy Head, 

 50 fathoms ; Scrabster Roads, 7 fathoms. Our list includes 



