with descriptions of some new species of Invertebrata. 317 



This species — coarse in form and sculpture, and plain in colour — 

 closely approximates Pleur. hrachystomum, Philippi, Enum. Moll. 

 Sicilise, vol. ii. p. 169. pi. 26. f. 10, from which I could not regard 

 it as distinct but for a single character possessed by that species in 

 raised spiral strise. These are apparent in the profile of the shell as 

 figured by Philippi ; they are much more numerous too than the deep 

 striae of Pleur. Ulidiana. 



Three specimens of this shell were dredged from a depth of about 

 8 to 10 fathoms by Mr. Hyndman and myself in Oct. 1834 in Strang- 

 ford lough, county Down. 



•f Triton elegans, Thompson. Plate XIX. fig. 1. T 



Shell turreted, somewhat ventricose, about eight volutions, nu- 

 merous prominent ribs crossed by fine raised spiral strise. 



Length 7 lines ; breadth just above the aperture 3;^ lines ; ribs on 

 each volution at regular distances from each other, except on the 

 body whorl, where within three lines of the outer lip they cease, 

 and substituted for them is one large varix equidistant between the 

 lip and last rib ; number of ribs on body whorl twelve, but this 

 number may rather be individual than specific ; ribs not continuous 

 from whorl to whorl ; aperture oval ; canal oblique, widening gra- -- 

 dually to base ; outer lip with slightly grooved strise within ; pillar- 

 lip smooth, except at top, where two ridges appear. 



Colour greenish white with two double spiral lines of yellow, one 

 series above the top of aperture, the other rather below it. 



This species is more handsomely formed, sculptured and coloured 

 than Triton erinaceus ; its canal is much shorter. 



I have seen only a single specimen, which was found alive at 

 Portmamock, on the Dublin coast, by Dr. Farran. 



•\Cardium Loveni, Thompson. Plate XIX. %. 7. 



Shell of a somewhat rounded outline with about thirty ribs, set 

 with small scales ; height and length equal ; colour pure white. 



Length 3f lines ; breadth 3|- ; very thin and delicate ; ribs rounded, 

 about thirty in number and becoming beautifully fine towards the 

 beak, covered with minute closely- set transverse scales throughout, 

 but which are more numerous on the ribs at each side ; furrows 

 about the middle of the valve smooth and shining, narrower than at 

 the sides, where towards the base they are crossed by transverse 

 scales, and towards the apex punctate — near the beaks they appear 

 in the form of a mere linear depression. 



Colour pure white, with somewhat of a pearly lustre inside and 

 outside. 



Compared with the British species of Cardium, this comes nearest 

 C. edule, but is more handsome in form, sculpture and colour. It is 

 more rounded (less truncate at the anterior end), has the beaks ter- 

 minating in a finer point, ribs more numerous and with the scales 

 on them more closely set, but less elevated, the furrows narrower. 



Cardium scabrum, Philippi, Enum. Moll. Sicilise, vol. ii. p. 38. 

 pi. 14. fig. 16, comes so near my shell, that future investigation may 



