BROWNE— MEDUSA FROM THE INDIAN OCEAN 201 



The Antarctic race 'has a character which has not been described in specimens from 

 other places. Both Vanhoffen and myself note the occurrence of clusters of nematocysts 

 upon the ex-umbrella, especially near the margin. If these clusters are not found in 

 specimens from other localities they could be used to isolate the Antarctic race. The 

 English and German expeditions to the Antarctic found Solmundella very plentifully at 

 their respective winter quarters, and it apparently stays there and breeds there throughout 

 the year. Though we both found the same race, still we called it by diiferent names. 

 Vanhofi'en regarded it as Solmundella bitcntaculata on account of his recognising only 

 a single species, whereas I tried to separate it from that species and called it Solmundella 

 mediterranea on account of its possessing only eight sense organs. The number of sense 

 organs has generally been used to separate the two species. Solmundella mediterranea 

 usually with eight sense organs and not more than sixteen, whereas Solmundella bitcn- 

 taculata may have double that number. The sense organs alone are hardly sufficient to 

 separate the two species because Solmundella bitentaculata passes through stages with 

 eight and sixteen sense organs. The shape of the umbrella may be useful when one is 

 examining living specimens or specimens preserved in perfect condition ; the latter, 

 however, are not often found in collections from abroad. 



40. Solmundella mediterranea (Miiller) 1851. 



^Solmundella mediterranea, Maas, 1906, p. 12, Taf. 1, fig. 5, Taf. 3, figs. 23 24. 



Solmundella mediterranea, Browne, 1910, p. 38. 



Solmundella bitentaculata var. mediterranea, Mayer, 1910, p. 156, pi. 54, figs. 1 — 3, pi. 55, fi". 4. 



Localities. North of Chagos, Surface (Temp. 84° F.). 16 May, 1905, A. 2 speci- 

 mens. 50—0 fms. 18 May, 1905, F. 1 specimen. Ghagos Archipelago, Salomon Atoll, 

 Surface. 5 July, 1905, Q. 4 specimens. Farquhar Group, Surface. 3 Sept. 1905, x. 

 3 specimens. Amirante Isles, Desroches Atoll. 50 — fms. 16 Oct. 1905, kk. 2 speci- 

 mens. Amirante Isles, Surface. 18 Oct. 1905, oo. 1 specimen. 



I have decided to place the " Sealark " specimens under the name of Solmundella 

 mediterranea as the best and largest specimen comes nearest to it. The umbrella is 

 highly arched, about 3 mm. in diameter, with isolated nematocysts scattered over the 

 ex- umbrella. The gonads are confined to the pouches and show ripe ova. The tentacles 

 are 13 mm. in length. There are nine sense organs, with otoliths, and four interradial 

 marginal bulbs. The other specimens are of little value for specific determination, being 

 either early stages or damaged. One specimen has Cttjzma- buds inside the stomach. 



41. GuNiNA sp. ? . 



Localities. North of Chagos. Chagos Archipelago. Farquhar Alphonse Is. 

 Amirante Is. 



The collection contains about .oO specimens taken at nine different stations. 



Nearly all the specimens of Cunina belonged to early stages, about 3 mm. in 

 diameter. Most of them have 8 tentacles, and a few have 7, 9 or 10 tentacles. They are 

 in rather bad condition and probably represent more than one species. 



At a station, North of Chagos, a series larger in size was taken, and had the 



SECOND SERIES— ZOOLOGY, VOL. XVII. 26 



