BROWNE— MEDUSA FROM THE INDIAN OCEAN 



181 



in the "Sealark" collection also show a large hollow enlargement of the distal end of 

 some of the tentacles. I am rather inclined to regard these dilatations in some way 

 due to the action of the killing re-agents used. I can find no such dilatations in 

 Turritopsis polycirrlia ; their tentacles in a semi-contracted condition are rather club- 

 shaped, as shown in the figure oi Turritopsis nutricula by Mayer (1910, pi. 14, fig. 13). 



The hydroid of Turritopsis nutricula is known under the name of Dendroclava, 

 which is probably identical with Tuhiclava of Allman. 



The medusoid genus has been previously recorded from the Indian Ocean. Vanhoffen 

 (1911) found a damaged specimen of Turritopsis between the Chagos Islands and the 

 Seychelles. Bigelow (1904) found a young Turritopsis in Felidu Atoll, Maldives. 



Distribution. North Atlantic along the coast of United States. Pacific Ocean, 

 Japan. 



10. Amphinema sp. 1 



Locality. Amirante Islands, Desroches Atoll. 200 — fms. 16 Oct. 1905, kk. 

 1 specimen. 



This little medusa was preserved in alcohol and is in rather a fragile condition. 



The umbrella is thin, a little less than 2 mm. in length and width, with apparently 

 a small apical projection. The stomach is not situated upon a peduncle. The mouth 

 has four small lips. The whole manubrium projects about half its length beyond the 

 margin of the umbrella. There are four inconspicuous radial canals, which apparently 

 leave the stomach a little way down its sides, and slight traces of very small incon- 

 spicuous mesenteries, but as it is difficult to estimate the amount of contraction and 

 shrinkage the presence of mesenteries remains doubtful. The gonads foj^m eight adradial 

 folded bands along the upper half of the manubrium, and each contains a few fairly 

 large ova. 



There are two large, opposite, perradial tentacles, with large tapering basal bulbs, 

 slightly laterally compressed. The basal bulbs are very opaque and of a dark brownish 

 colour ; but probably of quite a different colour when alive. On each half of the margin 

 of the umbrella, between the two tentacles, there are five very small bulbs, little longer 

 than broad, and evidently do not develop large tentacles. No trace of an ocellus could 

 be seen on any of the bulbs. 



This is an adult medusa probably belonging to a Perigonimus-Y^ke hydroid. 

 I cannot determine the species with any degree of certainty, as it does not show 

 clearly any well-marked character. A few more specimens were wanted, and in better 

 condition. 



Genus Leuckartiara, novum nomen, Hartlaub, 1914. (Tiara, preoccupied name.) 

 11. Leuckartiara gardineri, nova species (PL 39, fig. 4). 



Locality. Amirante Islands, Surface. 10 Oct. 1905, gg. 1 specimen. 



Description of the Species : — Umbrella conical, about twice as high as broad, with 

 rather thin walls. Four very conspicuous perradial canal-like bands projecting from the 

 surface of the ex-umbrella, and extending from the tentacles nearly to the summit of 



