208 TURBO. 



degree, and finding various intermediate forms, I am com- 

 pelled to consider it only a variety. — Hab. West Australia, 

 &c. 



Section 10. Bolma. 



56. EUGOsus, pi. vi. f. 60, Linnceus^ Syst. Nat. (12th edit.) 

 p. 1234 — cumanensis, Valen. (genus Bolma, Risso). — Testa 

 globoso-conoidea, imperforata, sordide viridula; spira gradata, 

 sutura impressa ; anfractus plus minusve angulati, spiraliter 

 scabroso lirati, superne plicis prominentibus coronati; apertura 

 subcircularis, plus minusve obliqua ; labrum aurantio limba- 

 tum ; columella late expansa, conspicue rufo-aurantio tincta. 

 Operculum crassum, extus rufo-aurantium, politum, costa 

 lata rotundata spirali munitum. — This species is always 

 easily recognised by the bright orange-red colour of the 

 broadly expanded columella, and of the operculum. Adult 

 specimens vary considerably in size, the smaller being usually 

 very solid, and those attaining a larger size comparatively 

 light. In quite young specimens the crown generally con- 

 sists of erect spines. — Hab. Mediterranean. 



57. GYEiLLUS, pi. vii. f. 73, Reeve (Trochus), Conch. Icon, 

 sp. 53. — Testa conico-turbinata, imperforata, rosea ; spira 

 elata, acutiuscula ; sutura impressa ; anfractus undique 

 papillato-granati, superne concavo declives, deinde biangulati, 

 ad angulos squamis peculiariter late expansis armati ; basis 

 subconvexa, in regione umbilicali callo tenuiter effuso 

 aurantio induta; apertura suboblique ovata. — Very nearly 

 allied to T. Tuodestus of the same author ; the whorls are 

 more squarely convex, and the scales larger and curiously 

 expanded. Not having seen many specimens, I can only 

 admit the species provisionally, as the differences dis- 

 tinguishing it from the last named may or may not be 

 constant. — Hab. China. 



58. MODESTUS, pi. xii. f. 150, Reeve, Proc. Zool. Soc. 1842, 

 Conch. Icon. sp. 56. — Allied to T. gyrillus, but of a more 

 slopingly conical form, and with the scales more pointed, not 

 squarely expanded as in that species. Possibly T. gyrillus 

 may be considered a local variety of this species ; but as far 

 as I have seen, it seems sufficiently distinct to be separated. 

 Both species are very rare, and the operculum seems to be 

 unknown. — Hab. Japan. 



