374 PLEUROTOMID.E. 



is not so conspicuous in this as in the last species, being partly 

 covered by the sculpture : inner Up slight and retired : pillar 

 flexuous. L. 1. B. 0-4. 



Var. 1. Philberti. Body pale yellowish-white, more or less 

 tinged in front with purplish-brown, and covered with minute 

 round flake-white dots : pallial tube cylindrical, rather long, 

 projecting, and somewhat curved ; it is of a darker hue than 

 the rest of the body: tentacles forming compressed cylinders, 

 rather long above, the eye-stalks : eyes on the tops of short 

 stalks, which are amalgamated with the tentacles : foot elon- 

 gated and thin ; front deeply indented or notched in the 

 middle, and expanding at each corner into an arched lobe or 

 auricle; hinder part broad, and abruptly pointed. Shell 

 dwarf, more solid, and particoloured ; ribs less numerous, but 

 not in proportion to the size of the shell. L. 0*4. B. - 2. 

 Pleurotoma Philberti, Michaud in Bull. Soc. Linn. Bord. iii. 

 p. 261, f. 2, 3. 



Var. 2. oblonga. Body light grey, mottled with purple: 

 pallial tube long, purplish-brown, finely wrinkled : tentacles 

 rather short, cylindrical, light grey ; lower portion speckled 

 with white : eyes on long stalks amalgamated with the ten- 

 tacles, about halfway up the latter : foot narrow ; front in- 

 dented in the middle, with angular corners ; hinder part finely 

 pointed ; sole white. Shell of the same size as the other 

 variety, but having the spire much shorter and not turreted ; 

 the body- whorl is proportionally much larger ; sculpture finer, 

 and not so tubercular. 



Habitat : Chiefly in the coralline zone and deeper 

 water, on stony and shelly ground, along the coasts of 

 Guernsey, Dorset, Devon, Cornwall, and Shetland; 

 Lundy Island (M f Andrew) j Isle of Man (Forbes) ; 

 Cork (Humphreys) . The first variety is mostly confined 

 to the laminarian zone, and is more diffused : I dredged 

 it off Croulin Island, Skye, in 30-40 f., close to the 

 shore ; and I found it in the Channel Isles under stones, 

 and among Zoster a at low- water mark ; Mr. Peach and 

 Mr. Norman have also procured it on the recess of the 

 tide, the former at Paignton, and the latter in the Clyde 

 district. The 2nd variety appears to be peculiar to the 



