Datu, — Mollusca and Brachiopoda. 
Fia. 
Fie. 
Fic. 
Fig. 
Fie. 
Fig. 
Fie. 
Fic. 
Fic. 
Fig. 
Fie. 9. 
Fia. 10. 
Fie. 11. 
Fie. 12. 
1. 
PLATE 12. 
Cavolina occidentalis Dall, with the animal fully expanded, drawn from life 
by W. H. Dall; max. lat. 22.0 mm. ; p. 288. 
lb. The same with the pteropodia partly folded preparatory to their with- 
drawal into the test; width about 12 mm. 
Ic. View of the “head” from above, showing the notched junction of the 
CO TD OP ow be 
9 
pteropodia and the strongly contrasted asymmetrical eye pedicels, much 
magnified. 
Trenosyrinx persimilis Dall; alt. 100.0 mm. ; p. 271. 
Leucosyrinz? pacifica Dall; alt. 23.0 mm.; p. 270. 
Murex (Tritonalia) diomedaeus Dall, vertical view showing varices; p. 313. 
The same, alt. 29.0 mm.; p. 313. 
Fusinus fragilissimus Dall, alt. 21 mm.; p. 301. 
Trivia panamensis Dall, profile view, lon. 4.2 mm.; p. 324. 
Trivia atomaria Dall, profile view, lon. 3.2 mm.; p. 323. 
Trivia panamensis Dall, basal view, p. 324. 
Trivia atomaria Dall, basal view, p. 323. 
The same, dorsal view. 
Trivia panamensis Dall, dorsal view, p. 324. 
Figures 8 and 7-12 were drawn by the late Dr. J. C. McConnell, the others by 
Miss Evelyn Mitchell. 
