440 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



Albatross 3262, 54° 49' 30'' N.; 165° 02' W., 43 fathoms, bk. s. r., 

 June 24, 1890; 1 small specimen. 



Albatross 3278 and 3282, near together in the southeastern part of 

 the Bering Sea, the first in 47 fathoms, the second in 53, both on 

 fne. gy. s. bottom, both in June, 1890. A single specimen from 

 each station. 



Albatross 3222, 54° 20' N.; 165° 30' W., 50 fathoms, bk. s. p. sh., 

 five specimens. 



Albatross 2848, 55° 10' N.; 160° 18' W., 110 fathoms, gn. m., 

 July 31, 1888, one specimen. 



Besides these Albatross specimens there is one lot of four collected 

 in June, 1884, by Lieut. George M. Stoney, United States Navy, in 

 63° 50' N.; 167° 21' W. (well north in Bering Sea), 17 fathoms; a 

 half dozen, small (immature ?) specimens, probably, though not cer- 

 tainly, of this species, from Kyska Harbor, Alaska, 14 to 9 fathoms, 

 sandy bottom, collected by W. H. Dall in 1873; also one small indi- 

 vidual, probably this species, from Constantine Harbor, Alaska, 6 to 

 10 fathoms, sandy and stony bottom, collected by Doctor Dall in 

 1873; one specimen Arctic Ocean, 66° 45' N.; 166° 35' W., 10 

 fathoms, W. H. Dall collection, August, 1880. 



MOLGULA SIPHONALIS Sars. 



Molgula sipJionalis M. Sars, 1858, p. 65. — Kiaer, 1893, pp. 77, 101; pi. 4, figs, 

 37-40.— Hartmeyer, 1903, p. 157; 1909a, p. 1323. 



So far as external characters are concerned, the single specimen 

 under examination agrees so well with descriptions of M. sipJionalis 

 as to raise no question about the identification. And the two super- 

 ficial characteristics of the species, namely, the long atrial siphon 

 and the long hair-Hke processes of the test, being, as Hartmeyer has 

 remarked, so unique, there can be little doubt, in spite of the slight 

 obstacle presented by the branchial sac, to be noted presently, that 

 Sars's Norwegian species is represented in Bering Sea. 



The number of longitudinal vessels of the branchial sac is rather 

 large in our specimen to be regarded as an individual variation of the 

 number given by Kiacr for sipJionalis. The scheme of vessels in our 

 individual is as follows: 



1? ^ f 1 \0-3-0-8-0-9-0-l 0-0-1 0-0-1 0-0-9-0 L. 

 ^'''^''^^^^^\0-6-0-6-0-9-0-8-0-S-0-5-0-6-0-R. 



For sipJionalis Kiaer gives: 0-5-0-^-0-^-0-5-0-^-0-5-0-4-0 //=36, 

 with no statement as to whether this is right or lefto But since in all 

 other points of internal structure the agreement is very close, this 

 difference in the vessels ought not, I think, to stand in the way of the 

 identification. 



One specimen. Albatross No. 3560, latitude 56° 40' N.; longitude 

 169° 20' W. (near St. Paul Island), 43 fathoms, fne. gy. s. bk. sp., 

 September 3, 1893. 



