269 
In the specimen from Umanak Fjord one of the radial canals (with 
gonad§) is bifurcate. 
The species is distributed throughout the subarctic Atlantic 
and adjacent, arctic waters. Bering Sea, Ochotian Sea, Japan (Bi- 
gelow 1913). 
Stations: 125 (r) — 171 (rr) — *181 (+) — 211 (rr) — 
*234 (rr) — *235 (rr). 
Staurophora arctica (Haeckel). 
Staurostoma arctica Haeckel 1879, p. 181. 
Staurophora — Browne 1907 p. 471. 
A few specimens were captured between Holstensborg and 
Sukkertoppen. Le vinsen records it from the Disco Bav. 
An arctic species, occuring in the Arctic Ocean, at Spitzbergen, 
in the Barents Sea and off the west coast of Greenland. (See the 
Addenda). 
Stations: 223 (rr) — *225 (rr). 
Aglantha digitalis (O. Fr. Muller). 
Medusa digitale O. Fr. Muller 1766 p. 248. 
— — Fabricius 1780 p. 366. 
Aglantha digitalis Haeckel 1879 p. 272. taf. 16, fig. 5, 6. 
This medusa is very common along the whole of the west coast 
of Greenland. — Vanhoffen (1897) has given thorough information 
about its seasonal variation and the occurrence of the young. He 
States that young individuals without any trace of gonads are found 
during the whole year. The youngest stages were found in May 
and June in the deeper lavers of the water. All specimens from 
October were 3—4 mm. The beginning of development of the 
gonads takes place in the spring (in a very few specimens as early 
as in January); the prolongation of the gonads begins occasionally 
in May; this rneans, I suppose, that the prolongation usually takes 
place about June, the maturation accordingly in the true summer 
months. Then it seems rather peculiar that the youngest stages 
are found in May and June, unless we suppose that Vanhoffen’s 
„youngest stages” are the young of individuals, breeding earlier 
