PLATE LXXIV. 



TROCHUS CINERARIUS. 



UMBILICAL TOP SHELL. 

 GENERIC CHARACTER. 



Animal a slug. Shell spiral sub-conic. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Umbilicated or perforated at the base. Not very conic. Five 

 whirls.— Colours various, generally greenish, radiated obliquely with 

 red or brown. 



Trochus Cinerarius : testa oblique umbilicata, ovata, anfractibus 



rotundatis. Linn. Syst. Nat. p. 1229. No. 590. 

 Trochus planior umbilicatus, undatim ex fusco perbelle radiatus, 



Umbilicalis Da Costa. Br. Conch, p. 46. 



tab. 3. fig. 4. 4. 

 Trochus planior undatim ex rubro late radiatus. List. H. Conch. 



tab. 641. fig. 32. 

 Umbilicated Top shell. Dale Harwich, p. 381. No. 4. 

 Trochus Umbilicaris. Umbilical. Penn. Br. Zool. No. 10S. 



tab. SO. fig. 106. 



A very common species on most of the British shores. 



A 4 



