434 Mr. W. Thompson's Additions to the Fauna of Ireland. 



single valve of this shell was dredged in Cork harbour in August 

 last: Prof. E. Forbes, Mr. R. Ball, 



Montacuta suhstriata, Mont, (sp.) ; Ligula substriata, Mont. Found 

 on the purple heart-urchin (Spatangus purpureus), dredged from 

 25 fathoms at the entrance of Belfast bay by Mr. Hyndman in 

 May 1842. 



Gastrochdena pholadia, Mont, (sp.), Turt. Brit. Biv. ; G. Mans, Flem. ; 

 Mya pholadia, Mont. ; Mya dubia, Penn. South islands of Arran, 

 off Gal way bay, and Youghal, county Cork, Mr. R. Ball. 



Pholas papyraceus, Turt., Brit. Biv. p. 2. tab. 1. f. 1 — 4 ; Pholas la- 

 mellatus, ibid. p. 4. tab. 1. f. 5, 6. Two specimens of this shell in 

 the Ordnance Museum are labelled '* Portrush," north of Ireland. 

 In the fifth volume of the ' Annals,' p. 14, this species was noticed 

 as Irish with some doubt. Mr. W. H. Harvey now writes to me 

 that " the specimen there alluded to as found in a fishing-boat at 

 Dublin was procured by Mr. Wm. Todhunter, who believes it to 

 have been dredged on a shelly bank between Howth and Lambay. 

 It certainly was imbedded in a sandy conglomerate of shells, &c., 

 which is commonly dredged in this place — the Torbay habitat, if I 

 remember right, is hard red-sandstone, and totally different." It 

 is remarked, in reference to the former note — " All the boats of a 

 certain class in this port (Dublin) are called * Torbay ' boats, as 

 they originally came from that place." 



Pholas striatus, Linn., Mont. Test. Brit. p. 26 ; P. conoides, Par- 

 sons, Flem. Brit. Anim. p. 457. January 7, 1842, 1 was favoured 

 with the following communication by Mr. Warren of Dublin : — " I 

 send for your examination a Pholas which is new to me, and should 

 like to know if it has been obtained before in Ireland. It was found 



• with others in a piece of water-logged mahogany near Killala, in 

 the county of Sligo, by Richard Glennon, jun." With the letter 

 were a single valve and a perfect specimen, which corresponded 

 well with the descriptions of Montagu and Fleming ; the speci- 

 mens were 4 lines in length and 7^ in breadth ; the plate at the 

 hinge " sub-oval," as described by Montagu. 



In January 1844 I was further informed by Mr. Warren, that 

 he had received a specimen of this Pholas from Mr. Gaggot, who 

 found several on the coast of Clare. The occurrence of the spe- 

 cies in the first instance was I believe noticed in the ' Dublin 

 Penny Magazine.' 



Pholas parvus, Mont. Was procured many years ago off the Long 

 Strand, Belfast bay, by Dr. J. L. Drummond ; subsequently by the 

 Ordnance collectors at Whitehouse Point in the same bay. 



MoLLXJSCA TVnicata. 



Ascidia mentula, Miilh, Zool. Dan. vol. i. p. 6. t. 8. f. 1 — 4. (Phallu- 

 sia, Savigny). Belfast bay ; Roundstone bay, co. Galway, ad- 

 hering to a stone between tide-marks, W. T. 3ic. 



Ascidia concUlega, MiilL, Zool. Dan. vol. i. p. 42. t. 34. f. 4 — 6. 

 Coasts of Antrim ^d Dow^, W, T, 



