214 DUBLIN UNIVERSITY 



Leda caudata {Donovan), 



A single valve was all that was met with of this species, perhaps 

 better known by the Turtonian synonym, Nucula minima. It has not 

 been found in the living state in the bay. 



Lima hians (Gmelin). 

 A single valve was found by Dr. M'Gee in the blue clay, during 

 the construction of the Prince's Dock. It has also been dredged in the 

 living state in the bay. 



Pecten variw (Linneus). 



Occurred frequently in the deposits, generally of a whitish colour, 

 but sometimes retaining the remains of tinting. It is now not com- 

 monly met with as a living inhabitant of the harbour. 



Pecten maximus (Linneus). 



Was diffused abundantly throughout the beds, and presented ex- 

 amples of all ages, from the most delicate fry, a quarter of an inch in 

 length, to gigantic individuals of the amplitude of six inches and a half. 

 We still have it living in the neighbourhood. 



Pecten opercular is (Linneus). 



Occurred in large numbers of fine size. One individual had an 

 indentation on the outside, which caused a corresponding protuberance 

 inside, but this, whether it was the result of accident or of disease, did 

 not appear to have produced much annoyance to the creature. Excel- 

 lent samples are still dredged, in the living state, in the bay. 



Ostrea edulis (Linneus). 

 Was embedded in innumerable myriads. The size attained was 

 much greater than that of maximum examples in the recent state. 

 There were several beautiful specimens of the variety Parasitica, one 

 measuring four inches in its extreme length, and three and a half in its 

 breadth, with the upper valve of a pure white colour, lustrous, and 

 surrounded by a deep border of the lower valve. Another reminded one, 

 by its produced shape, of the Virginia oyster ; while a third had the 

 beak of the lower valve very protuberant and hollowed out. A3 to 

 whether the species still occurs in the bay, I suppose every one has 

 heard already of the size and flavour of Carrickfergus oysters. 



