766 TROCHUS. 



SPENGLERI. 13. Shell conical, with transverse 

 rows of equal ochraceoiis nodules, undulated 

 with red, and one part of the base smooth. 



Trochus Spengleri. Chemnitz, v. p. 92. t. l69. f. 1631. 

 Gmelin, p. .3571. Schreibers Conch, i. p. 252. 



Trochus, No. 54. Schroeter Einl. i. p. 701. 



Inhabits — 



This shell, in Chemnitz's figure, appears to be about eleven lines 



long, and near thirteen broad, of a whitish colour tinged with 



pale red in longitudinal waves, although the nodules are said 



to be ochraceous. 



COSTATUS. 14. Shell conical, ribbed and grooved, 

 with alternate red and white longitudinal 

 stripes ; base flattish, white, and striped with 

 rose-colour. 



Trochus costatus. Gmelin, p. 357 1 . Schreibers Conch, i. 



p. 253. 

 Trochus, No. 56. Schroeter Einl. i. p. 702. 

 Chemnitz, v. p. 93. 1. 169. f. 1633 and l6S4. 



Inhabits 



This appears to me to be a badly defined species, and the 

 above description is taken from Chemnitz, whose figure re- 

 presents a shell about fifteen lines long, and fourteen broad, 

 with alternate red and whitish longitudinal stripes. Gme- 

 lin's description is quite different, and is as follows : " Shell 

 with elevated concatenated dots ; whirls with oblong white 

 nodules at the base, and intermediate purple grooves." Both 

 these authors have quoted Argenville, t. 8. f. T. and this is 

 said to be " remarquable par la quantite de ses boutons 

 blancs, tres saillans, et de differentes grosseurs ; on compte 

 sur un fond minime, trois rangs de petits boutons entre les 

 grands." Favanne has referred to the same figure of Ar- 

 genville's for his Sabot cercle, and considered it to be the 

 Trochus scaber of Linnaeus. 



iN^QUALis. 15. Shell conical, with several trans- 

 verse rows of nodules on each whirl, varying 

 in size, and largest above the sutures. 



Trochus inaequalis. Chemnitz, v. p. 93. 1. 170. f. l635 and 



1636. Gmelin, p. 3572. Schreibers Conch, i. p. 253. 

 Trochus, No. 57. Schroeter Einl. i. p. 702. 

 Le Sabot bourgeonne. Favanne^ ii. p. 364. t. 12. f. D. 

 Gualter, t. 60. f. O. 



