1903] Eeport on some Medusae from Norway and Spitzbergen. 17 



bulbs of the tentacles are of two kinds; the majority are colourless,. 

 but others, varying in number and position, contain a dark brown 

 or black pigment. There are usually six coloured basal bulbs in 

 each quadrant; they are about twice the size of the colourless bulbs, 

 and are situated on the inner side of the tentacles. The total num- 

 ber varies between 22 and 27. In some specimens, in addition to 

 the completely coloured bulbs, there are bulbs only partly coloured,. 

 with just one or two small patches of colour. In one specimen 30 

 such bulbs were counted, but usually only two or three are present. 

 They have the appearance of bulbs developing pigment. The go- 

 nads are globular in shape, and are situated at about two-thirds 

 the length of the radial canals from the stomach, but never on the 

 inner half of the canal. Diameter of the umbrella, 4 — 5y 3 mm. 



Mitrocomella, Haeckel. 1879. 



Eucopidae with 16 sense organs and with numerous tentacles,. 

 between them numerous cirri. Four gonads on the I radial canals. 

 Stomach not on a peduncle. 



Mitrocomella fulra, nova species. 



Plate I, fig-. 3, Plate III, fig. 1 & 2. 



A solitary specimen of this medusa was tåken off the Eddy- 

 stone on 28th May, 1898, during one of my visits to the Marine 

 Laboratory at Plymouth. A description of it was entered in a note- 

 book, but no drawings were made as the specimen was not in very 

 good conditioD. It is in my collection and has been used for com- 

 parison with the one tåken at Byfjord. As the Norwegian and the 

 British specimens belong to different stages in development it will 

 be best to describe them separately. 



Byfjord. 0—100 m. 5. 6. 1900. One specimen. 



Description: Umbrella hemisphaerical, about 5 mm. in length 

 and 10 mm. in width. 



Stomach very short, with a quadrangular base; mouth with 

 four lips having their margin folded. Gonads on the outer half 

 of the radial canals, extending almost to the umbrella-margin. Ten- 

 tacles about 20 in number, and about the same number of bulbs 

 without tentacles. Cirri about 3 — 6 between every two tentacles 

 or bulbs. Sense organs, 16. (4 in each quadrant) large and oval 

 in shape. (Otoliths not visible: specimen in formalin.) Colour of 

 gonads, stomach, and bulbs, pale dull yellow (in formalin). 



