PLATE XXVII. 



PAGE 



Urosyca caudata. Natural size. 159 



Neverita globosa. Magnified. 161 



Ampullina striata. Magnified. 161 



Terebra Californica. Magnified. 162 



Pugxellus hamulus. Natural size. 162 

 Front view of an old and very heavily incrusted individual. 



42 a. Lateral view of the same. 



Fig. 43. Cyprjea (Luponia) Bayerquei. Side view. 163 



43 a. Top view. 



43 b. View of the base. 



43 c. A young specimen from Tejon. 



Fig. 44. Cypr.ea (Epona) Mathewsonii. Magnified. Top view. 164 



44 a. Side view. 



44 b. View of the base. 

 Fig. 45. Anchura transversa. Magnified. 165 



Fig. 47. Helicaulax bicarinata. Natural size. 166 



