248 



EXPLANATION OF PLATE 25 

 Figure Page 



173. Crepidula fomicata (Linne) 130 



174. Crepidnla plaim Say 131 



175. Crepidula aculeata (Gmelin) 132 



Fig. a. Basal view. Fig. b. Lateral view. 



176. Tmncatella pulchella Pfeiffer 132 



177. Rissoina brjerea (Montagu) 132 



178. Adeorbls beau! P. Fischer 133 



Fig. a. Dorsal view. Fig. b. Basal view. 



179. Littorina inespillum (Megerle von Miihlfeld) 134 



180. Littorina angnlifera (Lamarck) 134 



181. Turritella subannulata acropora Dall 135 



