EULIMA. 205 



of Risso. Philip pi described and figured our shell as 

 E. nitida, under the impression that it was the Melania 

 nitida of Lamarck ; but that is much more slender, and 

 belongs to the Paris Basin. Although all the coloui'less 

 EulimcB are much alike, it must not be forgotten that 

 the fauna of the Eocene period was very different from 

 that which now exists in temperate latitudes. 



3. E. distou'ta"^, Deshayes. 



Melania distorta (Desk.), Philippi, Moll. Sic. i. p. 158, t. ix. f. 10. E. 

 distorta, F. & H. iii. p. 232, pi. xcii. f. 4, 5, and (animal) pi, KK. f. 4. 



Body whitish, mottled with reddish-brown [^'rubrum" 

 (Philippi) ; " yellow, beautifully variegated with carmine, 

 which forms an irregidar band on each side " (Alder); *' llake- 

 or pure white, and the anterior part of the body is marked 

 irregidarly with 15-20 distinct minute red dots " (Clark)] : 

 snout, or mentum, narrow and projecting beyond the foot : 

 tentacles loug and slender, placed close together at their origin, 

 and diverging at an acute angle [" white " (Alder) ; " the 

 bases and about a third of their lower parts of a brilliant ver- 

 milion colour " (F. & H.)] ; tips flake-white, and bulbous : 

 eyes black, placed on slight bulgings of the tentacles at their 

 outer base [" parvos " (Philippi) ; " very large " (Alder)] : 

 foot elongated, rounded in front, and bluntly pointed behind : 

 [liver "■ green " (Alder) ; " yellow, red, pink, light-green and 

 white" (Clark)]: 



Shell much smaller, slenderer and thinner than either of 

 the foregoing two species ; it is nearly transparent: sculpture, 

 none to be detected, even by the aid of the microscope ; colour 

 clear white : spire narrow, more or less curved, so as to give 

 the shell a distorted appearance : whorls 10-15, flattened : 

 suture marked by a fine line: mouth as in E. intermedia. 

 L. 0-2. B. 0-05. 



Yar. gracilis. Rather larger, more tapering, and scarcely 

 (if at all) distorted. F. & H. iii. p. 233, pi. xcii. f. 6. 



Habitat : Widely diffused (although local) from low- 

 water mark of equinoctial tides in rock-pools, among 



* Distorted, 



