PLATE XXVIII 



Fig. 46. ? Anchura carinifera. Magnified. 



Fig. 48. Helicaulax costata. Magnified. 



Fig. 49. Loxotrema turrita. Natural size. 



Fig. 50. Atresius liratus. Magnified. 



Fig. 51. Turritella Martinezensis. Natural size. 



Fig. 52. Nerita (Theliostyla) triangulata. 

 Magnified view of the back. 



52 a. Front view. 



Fig. 53. 

 Fig. 54. 

 Fig. 55. 

 Fig. 56. 

 Fig. 57. 

 Fig. 58. 

 Fig. 59. 

 Fig. 60. 



Calliostoma RADiATtTM. Magnified. 



Ataphrus crassus. Magnified. 

 Margaritella angulata. Magnified. 



Acm^a Tejonensis. Magnified. 



Actjeonina pupoides. Magnified. 

 AcTiEONELLA oviformis. Natural size. 



Liocium punctatum. Magnified. 



Ringinella polita. Magnified. 



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