710 DEEP WATER MOLLUSES AND BRACHIOPODS—DALL. vol.xvii. 



The substantial accordance of a second species in tbose characters 

 which seemed to differentiate the first from Chrysodomus proper, decided 

 me to institute the subgenus for them. The nucleus is more or less 

 worn in all the specimens, but seems to be globular, regular yet swollen, 

 and flattened at the summit. 



STEOMBELLA MELONIS, D a 1 1 . 



Plate xxviii, figs. 2, 3. 



Slromiella melonis, Dall, Proc. U. S. Nat. Mus., xiv, p. 187, 1891. 



Station 3227, in Bering Sea north of Unalaska, in 225 fathoms, 

 mud; bottom temperature 38.6° F. No. 122714, U.S.KM. Also in 46 

 fathoms. 



For those who reject the name Stromhella the species here referred 

 to it will, of course, be placed in the genus Volutopsius, Morch. 



STEOMBELLA FEAGILIS, Dall. 

 Plate XXVIII, fig. 4. 

 Stromhella fragilis, Dall, op. cit., p. 187, 1891. 



Station 3252, in Bering Sea north of the Aleutians, in 29i fathoms, 

 muddy bottom; temperature 44.8° F. No. 122710, U.S.N.M. 



This species has since been received from stations 3251, 3253, 3254, 

 and 3300, all in the eastern part of Bering Sea, in 15 to 50 fathoms, 

 muddy bottom. It is very variable in its irregularities of plication 

 and contour, but preserves a tolerably constant general aspect. 



STEOMBELLA MIDDENDOEFFII, Dall. 

 Plate XXVIII, fig. 1. 

 Stromhella middendorffii, Dall, op. cit. p. 186, 1891. 



Station 3253, in Bering Sea north of the eastern Aleutians, in 36 

 fathoms near the Pribilof Islands; bottom temperature 35° F.; also 

 on the south side of the Aleutians in the Pacific south of Unimak 

 Island, in 61 fathoms, sand. No. 122709, U.S.N.M. This species is 

 probably that which Middendorff referred to under the name of Trito- 

 nium norvegicum, to which the present shell bears a superficial 

 resemblance. 



Genus BERINGIUS, Dall. 



Beringius, Dall, Sci. Res. Expl. Alaska, 1879, pi. Ii, legend. Proc, U. S. 



Nat. Mus. 1886, p. 304. 

 Jumala, Friele, Norwegian N. Atl. Exp. i, p. 6, 1882 (Type J. Turtoni Bean); 



Ann. N. Hist., Nov. 1893, p. 352, olim. 

 Uklco, Friele, in Norman, Ann. N. Hist., ser. 6, xii, p. 352, Nov. 1893. 



The name Beringius was used by me in 1879 for the Strombella with 

 edentulous rhachidian tooth, my type being Chri/sodonius crebricostatus, 

 Dall (1877). It was not defined until 1886, while in 1882 Friele applied 

 and properly defined his name Jumala. In 1893, finding that Jumala 

 is the word used by the Christian Lapps to designate the Deity, at Dr. 



