ZOOLOGICAL AND BOTANICAL ASSOCIATION. 211 



Tapes aurea {Omelin). 



This species was locally abundant in the sand of the deposits. Some 

 examples had the ligament and colouring, by no means the worse for 

 their having been embedded, perhaps owing this high state of preserva- 

 tion to the presence of some antiseptic principle. In various spots in 

 the bay nothing could be more plentiful than this species is at the pre- 

 sent day. 



Venus striatula {Donovan). 



Three varieties of this species occurred in some numbers in the 

 sandy mud. First, the regularly laminated, elongated, and compressed 

 Laminosa, then typical specimens of the Gallina of British writers, and 

 a decidedly ventricose variety, with crowded and not very regular cos- 

 tellffl. The variety Gallina did not attain to anything like its usual 

 size in the recent state. It still lives in the harbour. 



Artemis exoleta (Linneus). 



Single valves occurred to me in the light-house deposits ; also a pro- 

 minent species in the former sea-beach, four feet above high-water mark, 

 at Jordanstown. It is now commonly enough thrown up, with sepa- 

 rated valves, by the tide. 



Artemis lincta {Pulteney). 

 "Was found in the deposits very sparingly in single valves, still pre- 

 senting a glossy appearance. It is not uncommonly met with valves 

 united in the bay. 



Lucinopsis undata {Pennant). 



Distributed in vast numbers throughout the sandy mud. One spe- 

 cimen measured an inch and a half in length, and almost an inch and 

 three-eighths in breadth. I have met with it thrown on the neighbour- 

 ing shores in a recent, though not living state. 



Cyprina Islandica {Linneus). 

 A fragment of this species, with very fresh epidermis, occurred in 

 the light-house bed. It is rarely taken living in the dredge. 



Cardium echinatum {Linneus). 

 Fine examples of this long known species were extremely numerous 

 in the blue clay. One specimen occurred, of a rather obliquely elongated 



