FUSUS. 325 



minent ridges. (Murex carinatus of Turton, not of Pennant.) 

 4. gracilis. Slender, thinner, and spirally ridged. 



Monstr. 1. contrarium. Spire reversed. (Murex contra- 

 rius, Linn.^sjP. sinistrorsus, Desh.) 2. acuminatum. Spire 

 elongated. 3. scalariforme. Whorls more or less detached. 

 4. cinctum. Encircled with a sharp ridge at the top or in the 

 middle of the lower whorls, now and then bicarinated. 5. sul- 

 catum. Lower whorls furrowed in the middle, and outer lip 

 notched, like a Pleurotoma. 6. Babylonicum. Spire turreted. 

 (F. Babylonicus, Brown.) 7. compressum. Squeezed in at the 

 sides ; mouth narrow. 8. volutceforme. Shaped like a Valuta. 

 (Buccinum undatum has an analogous form.) 9. varicosum. 

 Former outer lip, sometimes two or three, persistent. 10. con- 

 tortum. Spire twisted on one side or inwards. 11. suffultum. 

 Basal ridge continued to the periphery. 12. lioperculatwn. 

 Having two opercula. 



HABITAT : Coralline zone, from Cornwall (Couch) and 

 the south-eastern coast of England northwards to Shet- 

 land, where it lives also in the laminarian and deep-water 

 zones ; on the western coast it ranges from Fishguard 

 and Barmouth (J. G. 3.) to Shetland; throughout Ire- 

 land, from Bantry Bay (Humphreys) eastward to Dublin 

 Bay, and along the North Channel. It has not been 

 found, or noticed, in Devon or the Bristol Channel ; but 

 Pulteney gives Dorset, and Dodd Pontac in Jersey, as 

 localities. The 1 st variety seems peculiar to the Cheshire 

 coast ; the 2nd to deep water outside the Dogger bank ; 

 the 3rd to the south and south-east of Ireland, Dublin 

 Bay (O' Kelly, fide Turton) , the Hebrides, and Shetland ; 

 the 4th was dredged off Cape Clear. The monstrosities 

 are chiefly from Kent and Lincolnshire; Mr. Hyndman 

 has noticed one having an intorted spire as found at 

 Groomsport by Mr. Vance. F. antiquus occurs in most, 

 if not all, of our raised beaches (including Moel Tryfaen, 

 Wexford, and Stornoway) ; Belfast (Grainger) ; boulder- 

 clay at Wick (Peach) ; Clyde beds (Smith and others) ; 

 Mammalian and Red Crag (S. Wood); Belgian Crag 



