NOTES ON THE MARINE MOLLUSCA OF PORT-STEWART. 



where an Irish form is unknown to inhabit Clyde or Scottish 

 waters, I have indicated the same by a note. 



The total number of species and varieties which I obtained on 

 the Derry and Antrim coast was 112. Of these, 14 are not 

 found in the Clyde, or have been recorded on evidence which is 

 not altogether satisfactory, leaving no fewer than 98 which are 

 common to the Irish and Clyde shores. 



Of the 112 species and varieties, I am happy to be able to say 

 that eight are additions to the lists of both Mr. Praeger and 

 Dr. Chaster. These are Ostrea edulis, var. parasitica, Turt. ; 

 Pecten tigrinus, var. costata, Jeff. ; Cardium tuberculatum, L. ; 

 Venus gallina, var. gibba, Jeff. ; Donax vittatus, var. truncatus, 

 Marsh. ; Purpura lapillus, var. imbricata, Lmk. ; Pleurotoma 

 laevigata, var. minor, Jeff. ; and Bulla hydatis, L. Hydrobia 

 jenkinsi, E. A. Smith, must probably, in the meantime, be looked 

 on as not strictly marine. 



In order to make my list as trustworthy as possible, all the 

 shells were sent for verification to Mr. J. T. Marshall, of Torquay, 

 who has repeated many former kindnesses in once again 

 authenticating my records. 



The only further remark I need make is, that I have followed 

 the nomenclature of Jeffreys in his British Conchology, w T hich, 

 though now in many ways obsolete, must be our working system 

 until the Conchological Society issue their new and revised list. 



ANNOTATED LIST OF SPECIES AND VARIETIES. 



Pelecypoda. 



Anomia ephippium, L. — Not nearly so abundant as A. patelli- 

 formis, but still tolerably frequent. 

 *A. e])hippium, var. squamula, L. — Common. 

 *A. ephippium, var. acideata, Mull. — Moderately common. 

 A. patelliformis, L. — Very abundant, but valves usually much 

 worn. 

 Ostrea edulis, L. — Valves very scarce. 



*0. edulis, var. parasitica, Turt. : with the type. — Not recorded 

 in Praeger's list. 



