22 Edward T. Browne. [No. 4 



half way along the radial canals. Tentacles closely packed toge- 

 ther on the margin of the umbrella, about 80 in number. Sense 

 organs four. 



Skjerstadfjord. 0—490 m. 3. 4. 1900. One specimen. 



Umbrella 2 mm. in width and iy 2 mm. in length. 



Ova large and look about ripe. 



Byfjord. 100—200 m. 6. 11. 1900. Five specimens. 



Most of these specimens are intermediate stages, with gonads 

 just developing along the upper half of the radial canals. Ten- 

 tacles very numerous and closely packed together. 



Umbrella about IV2 mm, in width and 1 mm. in length. 



Although these specimens do not exactly agree in every detail 

 with the description and figure given by Maas, yet I do not con- 

 sider the differer) ces to be of sufficient importance for instituting a 

 new species. It is best to make a considerable allowance when 

 dealing with preserved specimens. Maas describes and figures the 

 umbrella with an apical knob consisting of clear jelly. The radial 

 canals and ring canal very broad. The Norwegian specimens have 

 also an apical knob, but it is composed of large cells which appear 

 to belong to the base of the stomach. The radial canals and the 

 ring canal are not so broad and conspicuous as those figured by 

 Maas. In all the specimens the tentacles are completely broken 

 off close to the margin. 



The species described by Maas was tåken by the "National" 

 Plankton-Expedition, but the exact locality is not stated. 



Aglantha digitalis (0. F. Muller.) 



Medusa digitale, Muller, 1766, p. 233. 



Aglantha digitalis, Haeckel, 1879, p. 272. Taf. XVI, fig. 5—6. 



Lofoten, N. W. of Røst. 0—700 m. 22. 3. 99. Three 

 specimens. 



Umbrella of the largest 17 mm. in length and 10 mm. in width. 



These specimens are unfortunately in very bad condition and 

 their sense organs are absent. I have separated them from Aglantha 

 rosea on account their size. The largest specimens of Aglantha 

 rosca, which I have seen, have not exceeded 12 mm. in length and 

 5 mm. in width. It is a small medusa compared with Aglantha 

 digitalis, which grows to about 30 — 40 mm. in length and 10 — 20 

 mm. in width. 



