DALL: MOLLUSCA AND BRACHIOPODA. 349 



Atlantic Ocean. 

 Turcicula tmperialis Dall. 

 Turcicula miranda Dautzeuberg and Fischer. 



Eastebn Pacific. 

 T. macdonaldi Dall. 

 T. bairdii Dall. 



"Western Pacific, etc. 

 T. crumpii Pilsbry. 

 T. aeola Watson. 

 T. argenteonitetis Lischke. 



Oligocene of "Washington. 

 T. washingtoniana Dall. 



Eocene of Oregon. 

 T. Columbiana Dall. 



Turcicula macdonaldi Dall. 



Plate 19, figure 7. 



Turcicula macdonaldi Dall, Proc. U. S. Nat. Mus., 1889, 12, p. 348, pi. 7, fig. 7. 



U. S. S. "Albatross," station 2792, off Mauta, Ecuador, in 401 fathoms, 

 mud, bottom temperature 43° F; also at station 3356, Gulf of Panama, in 546 

 fathoms, mud, bottom temperature 40°.l F. U. S. N. Mus. 122,958. 



This is the largest and finest recent species yet described. 



The species of Turcicula are fouud at considerable depths in the tropics and 

 warm temperate zone, but in the cold waters of Bering Sea, Turcicula bairdii 

 has recently been dredged by the "Albatross" in 25 fathoms, but always in the 

 offshore fauna. No species has yet been described from any part of the shore 

 fauna properly so called, and even the Miocene fauna of Oregon, where it might 

 reasonably have been expected to occur, is without it, the assembly in that hori- 

 zon being a shallow water coast fauna. 



"While the type of sculpture characteristic of Turcicula is also found in many 

 other deep water Trochids, the species can easily be discriminated from the Solar- 

 iellas which are its next allies by its imperforate base with no umbilical depression. 



SOLARIELI^A Searles "Wood. 

 Solariella nuda Dall. 



Plate 3, flgures 5, 7. 



Solariella nuda Dall, Proc. U. S. Nat. Mus., 1896, 18, p. 9. 



Shell turbinate, recalling Margaritcs, smooth, polished, except for obscure 

 spiral markings which do not interrupt the surface, of about four whorls ; color 



