Crustacea of St. Andrews. 271 



Genus Ncenia, Bate. 



Ncenia tuberculosa, Bate ; B. & W. op. cit. i. p. 472. 

 Occasionally in the debris of the fishing-boats. 



Ncenia rimapqlmata, Bate ; B. & W. op. cit. i. p. 474. 

 With the former. 



Ncenia excavata } Bate ; B. & W. op. cit. i. p. 476. 

 Common in the same debris from the coralline ground. 



Subfamily Corophiides. 

 Genus Corophium, Latreille. 



Corqphium grossipes, L. ; B. & W. op. cit. i. p. 493 (as C. lon- 



gicornis) . 



Abundant in the brackish pools near the mouth of the Eden, 

 and occasionally at the West Rocks. It is common in July : 

 swims excellently on its back. 



Division Htpeeina. 



Fam. Hyperiidae. 



Genus IIyperia, Latreille. 



Hyperia medusarum, O. F. Midler ; B. & W. op. cit. ii. p. 12 



(as II. gcdba). 



Common in the cavity of Aurelia aurita ; each medusa had 

 six or eight large examples. The Lestrigonus Kinahani, 

 Bate, is a sexual variety (male). Some large specimens are 

 found swimming freely on the surface of the water. 



IIyperia oblivia, B. & W. op. cit. ii. p. 17. 

 In a tide-pool on the West Sands after a storm. 



Group ABERRANTIA. 



Fam. Caprellidae. 



Genus iEGiNA, Kroyer. 



JEgina plxasma, Mont. ; B. & W. op. cit. ii. p. 45. 

 Abundant in the debris of the fishing-boats. 



