Sp. 



51. M. canaliferus, Soiv. Jun. Zool. Proc. 1840. Con. Illus. 



f. 74. 



52. M. Mitriformis, Sow. Jun. Zool Proc. 1841. Con. Illus. 



f. 75. 



53. M. Capensis, Sow. Jun. Zool. Proc. 1840. Con. Illus. f. 



76. Cape of Good Hope. 



54. M. pinnatus, Swainson, Bligh. Cat. Appendix p. 17- 



Zool. Illus. 2nd Ser : pi. 122. China. 



55. M. tripterus, Bom, p. 291. t. 10. f. 18-19. Wood, Index. 



Test. M. Trialatus, Con. Illus. f. 54. 54* (Not M. 

 Trialatus, C. I. f. 33.) Gmelin was mistaken in 

 referring this sp, to the fossil which bears the 

 name. Ticao, Philippines. 



56. M. trigonularis, Lam. vii. p. 165. Con. Illus. f. 107- 



Our shell agrees so well with Lamarck's descrip- 

 tion, that we venture to apply the name to it, not 

 withstanding Mr. Gray's statement, that the M. 

 tiigonularis of La77i. is nothing but Acanthop- 

 terus deprived of its fringes. Mr. Gray cannot have 

 studied the subject, for he has mixed up the latter 

 species with the " M. Purpura alata" of Chemmitz. 

 (M. foliatus of Gmelin,^ Bantayan, Philippines. 

 Mr. Cuming. 



57. M. uncinarius, Lam. vii. p. 166. Martini iii. f. 1034-5. 



Con. Illus. f. 106. Isl. Masbate, Philippines. Mr. 

 Cuming. 



58. M. trialatus, Soxo. Jun. Zool Proc. 1841. Con. Illus. f. 33. 



(Not trialatus, f.54. 54.*) 



59. M, acanthopterus, Lam. vii. f. 165. E. M. pi. 417- f. 2. 



a. b.Con. Illus. f.85. Brown variety, young (alatus,) 

 Con. Illus. f. 51. A very large shell from Isl. 

 Mindinao exists in Mr. Cuming's cabinet, which may 

 probably be referable to this species, Con. Illus. f. 

 115. 



60. M, foliatus Gmel. p. 3529. M. Tripterus. Lam. vii. p. 



165. "M. Purpura alata" Chem. 10. t. 161. f. 1538-9 

 N.W. Co. of America. 



