34 



The ground colour of this shell is white, with spots of deep 

 brown arranged in bands, the spire is rather long and slender, the 

 lips of the aperture are thick, and formed into an elevated square 

 at the upper part, they are of a buff colour, with band- like spots 

 on the outer margin. In the collection of Mr. Cuming and Miss 

 Saul. Rurutu. 



41. S. tricornis. (pi. x. f. 103, 107.) Humph. Portland Cata- 

 logue, p. 5. 



T. ventricosa, sub-trigona, lsevi, spiraliter obscure rostrata ; 

 spira brevi, nodulosa ; anfractibus angulatis, ultimi margine 

 flexuoso, crasso, ad angulum tuberculis tribus magnis, mediano 

 maximo, elongato ; apertura sub-trigona ; labio externo dilatato, 

 crasso, postice elevato in spinam ad angulum posticum elongato. 



A triangular shell, with three tubercles on the back of the body 

 whorl, the largest in the centre, the outer lip is elevated and elon- 

 gated at the outer angle, the ground colour is white or pale brown, 

 in some varieties very elegantly mottled with dark brown streaks 

 and patches ; the aperture is buff. Antilles. 



42. S. peruvianus. (pi. x. f. 110.) Sw. Zool. Illust. 



T. trigona ; spiraliter costata ; spira obtusa ; anfractibus nodu- 

 losis, ultimo magno, tuberculis magnis coronato, ad dorsum uno 

 maximo, in medio serie tuberculorum minorum ; apertura sub-tri- 

 gona; labio interno postice crenato; labio externo in angulum 

 acutum elevato. 



The colour of this shell is pinkish brown ; the aperture is buff, 

 tinged with deep rose and orange. 



43. S. lobatus. (pi. viii. f. 76, 77, 78.) Sw. Zool. Illustr. 

 1821. S. bituberculatus, Lam. vii. p. 202. (1822.) 



T. trigona, spiraliter costata; spira brevi, tuberculata; anfractu 

 ultimo margine expanso flexuoso, ad angulum tuberculis coronato, 

 dorso duobus maximis armato, in medio seriebus duabus tubercu- 

 culorum minorum ; apertura sub-trigona, postice plicata. ; labio 

 externo expanso postice bilobato, interne crenulato. 



The usual ground colour is grey, mottled with greenish brown. 

 The variety, figure 78, is destitute of the two large tubercles 

 which generally characterize the species. Antilles. 



44. S. gallus. (pi. x. f. 108, 111.) 



T. S. lobato simili, tuberculis maximis tribus; labio externo 

 magis dilatato, postice in digitam attenuato ; canali antice elon- 

 gato. 



Resembling S. lobalus, but having three large tubercles, 

 the two minor rows of tubercles wanting, the outer lip much 

 more expanded, with a posterior elongated lobe, and an anterior 

 caudal canal. Asia and America ? 



45. S. accipitrinus. (pi. x. f. 115, 116.) 



T. sub-trigona, spiraliter costata ; spira brevi ; anfractibus an- 

 gulatis, ad angulum tuberculatis, ultimo margine expanso, tuber- 

 culis magnis duobus, mediano maximo; apertura lata; labio 



