676 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol. 52. 



The type, Cat. No. 271076, U.S.N.M., was dredged by the U. S. 

 Bureau of Fisheries steamer Albatross^ at station 4310, off Point 

 Loma Light, California, in 71 to 75 fathoms, on gi'een mud and fine 

 sand bottom. The type has lost the nucleus and probably the first 

 postnuclear turn; the 6| remaining measure — length, 6.5 mm.; di- 

 ameter, 2.6 mm. Cat. No. 268745, U.S.N. M., contains another speci- 

 men from San Bartolome Ba}^, Lower California. 



BITTIUM TRAMPASENSIS Clark. 



Bittium frampasensis Clark, Bull. Dept. Geol. Univ. Cal., vol. 8, 1915, pp. 

 489, 490, pi. 65, figs. 3. 5. 



This species occurs in the Miocene, Upper San Pablo group, at 

 University of California locality 118. Two specimens are figured, 

 both incomplete; the measurement given is 8 mm. for the height. 



BITTIUM ? PABLOENSIS Clark. 



Bittium pahloensis Clakk, Bull. Dept. Geol. Univ. Cal., vol. 8, No. 22, 1915, 

 p. 489, pi. 65, fig. 10. 



The unique type came from the Miocene of the San Pablo group 

 of San Pablo Bay. From the description and figure I would un- 

 hesitatingly say that this is not a Bittium, but I am unwilling to 

 refer it to another group without more evidence. The type is said 

 to have six or seven whorls and to measure — length, about 16 mm. ; 

 diameter, 8 mm. 



BITTIUM LONGISSIMUM Cooper. 



Bittiin longissimum Cooper, Bull. 4, Cala. State Min. Bur., 1894, p. 43, pi. 2, 



fig. 30. 



I overlooked this specimen in my paper on The Eecent and Fossil 

 Mollusks of the Genus Bittium from the West Coast of America.^ 



It is a slender specimen of 16 whorls, measuring — length, 12.25 

 mm. ; diameter, 1.55 mm. It was collected by Mr. Watts in the weir 

 at jNLarysville Buttes. The figure above cited is a wretched one, ab- 

 solutely unrecognizable. A specimen from the type locality is nicely 

 figured by Dickerson.^ 



_ BITTIUM WASHINGTONIANA Dickerson. 



Triforis wasJiingtoniana Dickerson, Cala. Acad. Sci., vol. 5, 1915, p. 63, 

 pi. 6, fig. 13. 

 This is not a Triphoris, but a Bittium. The No. 362 Cala. Acad. 

 Sci. type has 9 whorls and measures— length, 20 mm. ; diameter, 4.5 

 mm. It comes from the Eocene-Tejon formation locality 183 on the 

 west bank of the Cowlitz Kiver, about one and three-fourths miles 

 southeast of Vadar (Little Falls), Washington. 



iProc. U. S. Nat. Mus., vol. 40, 1911, pp. 383-414, pis. 51-58. 



2 Bull. Dept. Geol. Univ. California, vol. 9, No. 17, 1916, pi. 40, fig. 11. 



