TESTACEOUS MOLLUSCA. 61 



To the list of 1886 we are enabled to add 37 species 

 (marked by asterisks in the following pages), of which the 

 Spirida is a pelagic cephalopod, accidentally drifted to 

 our shores. The 9 species enclosed in square brackets 

 are for various reasons doubtful. Five of them, viz.. 

 Pinna ricdis, Trochus lineatus, Odostomia conoidea, 0. 

 pusilla, and Gerithiopsis tubercularis, may quite possibly 

 occur but require confirmation : Donax trunculus is a 

 certain error in Eep. I and should be expunged, the speci- 

 mens being referable to D. vittatus : Aplysia depilans is 

 an almost equally certain error : Fits us islandicus of Forbes 

 and C. H. Brown = F. gracilis, DaC. ; while there is much 

 reason to believe that Cardiiim ecliinatiun was mistaken 

 for G. acideatum by Forbes in his " Malacologia Monensis." 

 The following should be added to the bibliographical 

 references on p. 247 of Kep. I. 



Forbes and Hanley's '' History of Brit. Mollusca" (1853). 

 Dr. J. G. Jeffrey's "Brit. Conchology" 5 vols. (1863). 

 Thos. Pennant's "Brit. Zoology" vol. IV (1777). 

 Chas. H. Brown's Mollusca in Dr. Nichol's " Southport," 



3rd edition (1883). 

 Kev. Carleton Greene's "Marine Moll, of N. Wales" 



in " The Conchologist " vol, I, No. 1. 

 B. Tomlin's " Notes on N. Wales Mollusca " in " Quar- 

 terly Journal of Conchology," vol. VII, No. 1 (Jany., 

 1892), also containing some corrections of Kev. C. 

 Greene's paper. 

 Dr. G. W. Chaster's " Mollusca of Southport and Dis" 

 trict " in Eep. I of Southport Soc. Nat. Sc. (1892). 



