1903] Keport on some Medasae from Norway aud Spitzbergen. 9 



Description of the specimen in this collection. Plate I. fig. 1. 



Umbrella cone-shaped, about twice as long as broad. Manubrium 

 very long, extending outside the umbrella. Above the manubrium 

 a conspicuous apical canal. Mouth circular. Gonads along the 

 whole length of the manubrium forming a continuous mass, termi- 

 nating within a short distance of the mouth. Tentacles (Pl. III, 

 fig. 4) four, very long, closely covered with large, alternating dusters 

 of nematocysts; the terminal duster small. Basal bulbs of the 

 tentacles large, little longer than broad. Ocelli roundish and small. 



Umbrella 28 mm. in length and 15 mm. in width. Umbrella- 

 cavity 21 mm. in length. Manubrium 30 mm. in length and 3 mm. 

 in diameter. Length of apical canal 3V2 mm. Basal bulbs 3 mm. 

 in length and 2 mm. in width. Locality: Spitzbergen; 8 miles off 

 Red Bay. Tåken between ice. 22. 8. 1900. H. Andresen. 



Distribution. Greenland and Spitzbergen. 



The umbrella is very large and its shape resembles the 

 swimming-bell of a large Diphyidae. There is above the manubrium 

 a conspicuous apical canal, which is the remains of the connecting- 

 canal between the young medusa and its hydroid. In this specimen 

 the end of the canal is bifurcated, which is an abnormality. The 

 gonads extend from the top of the manubrium, leaving no free 

 space as in barsia tubulosa (Saks), down to within about 3 mm. 

 of the mouth. This portion, free from gonads is the stomach proper 

 and its external surface is covered with minute papillae, which 

 probably contain nematocysts. 



Sarsia tubulosa (Sårs). 



Oceania tubulosa, M, Sårs, 1835, p. 25, Pl. V, fig-. 11. 

 Sarsia tubulosa, Lesson, 1843, p. 333. 



Hjeltefjord. — 50 mm. 2. 9. 98. Three specimens. 



a) Umbrella 7 mm. in length and 5 Va mm. in width. 



b) Umbrella 6 mm. in length and 5 mm. in width. 



c) Umbrella 5 mm. in length and I mm. in width. 



Off Herlø. 0—200 mm. 15. 6. 1900. One specimen. 



Umbrella 7 mm. in length and 5 mm. in width. 



These are all quite typical specimens of this species, and the 

 largest have well developed gonads. 



Michael Sårs first described this species from specimens 

 collected on the coast of Norway. It is a common medusa in British 

 seas during the spring and summer, but is not seen after July. 



