108 Mr. E. A. Smith on Gasteropoda 



tibus interrupte rufo-fuscis cinctus ; apertura subovata, pallide' 

 fusco-lactea, longitudinis totius ^ paulo superans ; labrum parum 

 expansum, ad carinas spirales sinuatum; columella teuuiter callosa, 

 alba ; canalis brevis, leviter recurvus. 



Long. 53 mill., diam. 25 ; apertura long. 29 mill., diam. 16. 



Operculum ovale, nucleo prope marginem sito, incrementi liueis 

 striatum. 



Hab. East Yesso, 11 fathoms. 



The plications which produce nodules on the spiral ele- 

 vations become almost obsolete on the last half of the body- 

 whorl. The nodules number about ten on the penultimate 

 whorl. The entire surface is spirally rather distantly striated, 

 which is plainly visible to the naked eye, and also very 

 minutely granosely striated, only apparent with the aid of a 

 lens. 



74. Turbo (Marmorostoma) coronatus, Gmelin. 



Turbo coronatus, Gm. Syst. Nat. p. 3594 ; Chemnitz, Conch. -Cab. v. 

 f. 1791-2 (corona reclusa) ; Reeve, Conch. Icon. iv. pi. v. f. 22 ; 

 Kiener, Coq. Viv. pi. 12. f. 2, 2a. 



Turbo reclusus, Chemnitz, and Turbo spinosus, Meuschen, fide Morch, 

 Yoldi Cat. p. 161. 



Var. = Turdo lugubris, Reeve, /. e. f. 63. 



Var. = Turbo creniferus, Kiener, /. c. pi. 34. f. 3-3 a. 



Var. umbilicata= Turbo granulatus, Gmelin, Syst. Nat. p. 3601 ; Chem- 

 nitz, I. c. fig. 1744-46 ; Kiener, I. c. pi. 28. f. 2. 



Hab. Ooshima, on the shore (St. John) ; Port Natal (Dr. 

 Sutherland and J. Sanderson). 



After a careful study of this species, I do not feel justified 

 in separating T. coronatus and granulatus, the former being 

 the non-umbilicated and the latter the umbilicated variety. 

 Usually the tubercles are much more strongly developed in the 

 typical form ; but in the large series in the Museum collection 

 there are examples of both varieties which have the style of 

 tuberculation identically the same, and differ only in the 

 presence or absence of the perforation. 



Lischke, in his ' Japanische Meeres-Conchylien,' p. 88, states 

 that T. coronatus has only three principal series of elevations, 

 whereas T. granulatus has four. But this only applies to the 

 typical forms of both varieties ; for there are some examples 

 of the former with the lower series of nodules (that is, the one 

 which encircles the body-whorl a little below the middle) very 

 slightly developed or even entirely wanting ; and, on the other 

 hand, other specimens (T. granulatus, "var. minor imper- 

 forata" of Lischke, I.e.) have four principal series of nodules 

 well developed. 



