Mr. W. Thompson's Additions to tlie Fauna of Ireland. 173 



far from its junction with the Blackwater. It measured 7 feet 

 8 inches in length, and weighed nearly 2 cwt." 



In a "Note on the Irish species of Cephaloptera {Pterocephala), 

 by Frederick M'Coy, M.G.S. and N.H.S.D. &c," published in the 

 * Annals ' for March last (vol. xix. p. 176), the writer seems to con- 

 sider that it is not the Ceph. Giorna, Risso, and recommends that 

 the genus Pterocephala, into which it would come, should be adopted. 

 He remarks that : — " On examining this very interesting specimen, 

 I found that although obviously a Pterocephala, yet it presented 

 most important differences from the C. Giorna, both in outline, pro- 

 portions, shape of the fins, and form of the wing-like appendages to 

 the head * * * ; [it] seems referable to that described many years 

 ago * * * and figured by Lacepede under the name of Raja Fabro- 

 niana." 



The writer then proceeds to point out in detail the various differ- 

 ences between Cephaloptera Giorna and Raia Fabroniana. 



Before publishing a notice of the Irish Cephaloptera in 1835 I re- 

 ferred to the R. Fabroniana of Lacepede, and considered the speci- 

 men as having about much the same resemblance to it as to the 

 C. Giorna, but preferred adopting the latter name. Muller and 

 Henle in their great work on the " Plagiostomen," the highest au- 

 thority extant on the subject (published in 1841), brought the two 

 names together as representing but one species, and adopted for it 

 Risso's term, Cephaloptera Giorna. The Prince Bonaparte has done 

 the same in his ' Catalogo Metodico dei Pesci Europei,' published at 

 Naples in 1846. If therefore I have been the means of the specimen 

 being " erroneously referred to in most works on British Zoology," 

 I err in company with the two best authorities in Europe ; and if I be 

 correct, I am indebted to the writer of the " Note, &c." under con- 

 sideration for providing by his description and figure better means 

 than I had myself done of proving the correctness of my opinion 

 respecting the species in question. 



The specimen was so imperfect, and in addition, so distorted by 

 the preserver, that, although in possession of an accurate drawing 

 of it previous to publishing the note in 1835, 1 was unwilling to have 

 it engraved. The relative dimensions being, for the same reasons, 

 necessarily inaccurate, I abstained also from giving them. 



MOLLUSCA. 



Lacuna Montacuti, Turt. Zool. Journ. vol. iii. p. 191. Helix 

 lacuna, Mont. Test. Brit. p. 428. t. 13. f. 6. 



A specimen was obtained near Portaferry, Strangford Lough, in 

 August 1837, by Mr. Hyndman and myself. 



Rissoa inconspicua, Alder, Ann. Nat. Hist. vol. xiii. 



One specimen found at Portmarnock, 1838, W. T. ; one at Bun- 

 doran, 1840, Mrs. Hancock. 



