collected in Japanese Seas. 109 



Also with T. granulatus are found specimens having two, 

 three, or four most prominent series. All specimens of every 

 variety agree in having a scarlet apex, which is finely per- 

 forated ; and down this perforation a fine pin can be thrust 

 some considerable distance in the non-umbilicated forms, and 

 completely through some specimens which possess the um- 

 bilicus. 



75. Turbo (Collonia) amussitatus, Gould. 



Turbo anmssitata, Gould, Proc. Boston Soc. Nat. Hist. viii. 18G1 ; 



1 Otia,' p. 160. 

 Collonia rubra, A. Adams, MS. in Mus. Cuming. 

 Turbo sanf/arensis, Schrenck, Bull. Acad. Sci. St. Pe"tersb. iv. p. 400 ; 



Reisen im Amurlande, p. 363, pi. xvi. f. 6-11. 

 Var. = Turbo pumilo, Schrenck, Bull. &c. p. 410 ; Reisen, p. 363. 



Hab. Endermo Harbour, 4-7 fathoms, sandy mud ; and lat. 

 41° 12' N.,long. 145° 45' E., 43 fathoms, sand and mud. 



A variety from Yamada Harbour, 7 fathoms, sand and 

 broken shells. 



76. Turbo [Collonia) nocturnus, Gould, Otia Conch, p. 160. 



Testa ovato-conica, sordide albida vel fuscescenti-alba, liris fusco 

 irregulariter punctatis ornata, imperforata ; anfractus 5, convexi, 

 sutura subprofunda discreti, liris spiralibus (in penult. 6-7, quarum 

 infimis 3 saepe quam ceteris crassioribus) cincti, anfr. ultimus 

 infra paululum planulatus liris circiter 18 (quarum 4 circa 

 medium frequenter quam caeteris majoribus, iis supra basim 

 tenuissimis) ornatus ; apertura circularis, margaritacea ; colu- 

 mella alba, incrassata, medio unituberculata ; operculum leviter 

 concavum, fusco marginatum, sub microscopio minutissime corru- 

 gatum, ad marginem unisulcatum. 



Long. 61 mill., diam. 5. 



Hab. Lat. 41° 12' N., long. 140° 45' E., 43 fathoms, sand 

 and mud. 



Great care must be taken not to confound specimens of this 

 species without opercula with Trochus ( Gibbula) yamadanus ; 

 for the form, style of coloration, and general aspect are very 

 similar. Nevertheless the absence of an umbilicus and the 

 coarser spiral ribbing at once distinguish this species. 



A variety from Yamada Harbour is almost entirely of a 

 uniform purplish brown colour, only faint indications of the 

 articulated dotting existing. A specimen in the Cumingian 

 collection is encircled at the periphery with a plain white 

 band. 



