TURBO. TURBAN* 229 



eular, slightly adhering to but not clasping the body volu- 

 tion, the margin not very thin : diameter the tenth of an 

 inch. 



Western coasts : and in Dublin bay \ve have found them 

 double the size. v. m. 



92. Turbo Margarita. Pearl Twban. 



Helix Margarita. Laskey, Wcrn. Soc. i. pi. 8. f. 5. 



Shell flattish, rather produced at top, white or with a 

 slight tinge of bronze, with a faint rufous brown band on 

 the upper part of the body volution, which follows the 

 course of the next, but is lost in the third : spires four or 

 live, convex beneath, with a large and deep perforation : 

 aperture somewhat orbicular, a little crescent-shaped, finely 

 nacred on the inside : diameter hardly a line. 

 Found by Captain Laskey, on the Scotch coast, very rare. 



K. Indistinct and uncertain species, 93 to 105. 



93. Turbo retiformis. Walker, f. 37. 



Shell white, opake, with four white opake reticulate 

 spires : aperture rather oval. 

 At Sandwich : minute. 



94. Turbo fuscus. Walker, iA2. 



Shell brown, opake, with five striate spires: aperture 

 somewhat oval. 



Bysing wood, near Faversham : minute. 



95. Turbo strigatus. Walker, f. 38. 



Shell white, opake, with three spires, and three transverse 

 ridges on the larger volution : aperture somewhat ovai. 

 At Seas alter : minute. 



96. Turbo Carinatulus. Walker, f. 44. 



Shell taper, carinate, white, opake, with seven spires : 

 aperture contracted, margined. 

 At Sandwich : minute. 



07. Turbo Rivulus. Walker, f. 5/. 

 Shell white, opake, with four spires : aperture oval, mar- 

 gined... 



From a stream near Faveriham ' Hiinute. 



x 53. Turbo 



