Dau, — Mollusca and Brachiopoda. 
Fie. 
Fig. 
Fie. 
Fig. 
Fia. 
Fia. 
Fic. 
Fie. 
Fi@. 
Fie 
Fie 
Fie 
Fie 
Fie 
. 14. 
Cw eco bo 
8. 
3 
lO! 
5 lls 
. 12. 
. 13. 
PLATE 18. 
Protocardia panamensis Dall; lon. 18.6 mm.; p. 415. 
Poromya perla Dall, side view ; alt. 9.0 mm.; p. 428. 
Nucula chrysocoma Dall; lon. 5.0 mm. ; p. 370. 
The same, dorsal view, showing prodissoconch. 
Poromya perla Dall, profile of left valve from in front; alt. 9.0 mm.; 
p. 428. 
Malletia (Neilo) goniura Dall; lon. 13.0 mm.; p. 386. 
Limopsis diazi Dall, view of interior; lon. 4.5 mm.; the crenulation of 
the margin was indistinct on this specimen; p. 397. 
Limopsis juarezi Dall, exterior; lon. 6.2 mm.; p. 396. 
Arca (Bathyarca) nucleator Dall; lon. 6.0 mm.; p. 897. 
Cetoconcha smithit Dall, profile ; lon. 18.5 mm ; p. 481. 
Nucula savatieri Mabille & Rochebrune; lon. 14.0 mm.; p. 867. 
Lyonsia panamensis Dall; lon. 12.0 mm.; p. 427. 
Vesicomya lepta Dall, interior of right valve; lon. 15.0 mm. (young 
specimen) ; p. 416. 
External view of the same valve, about natural size for the adult. 
Figures 13 and 14 were drawn by the late Dr. J. C. McConnell, the others by 
Miss Evelyn Mitchell. 
