THE MEDUSA. 171 



21 tentacles, with long, narrow, tapering basal bnllis. About 5 or G marginal bulbs 

 between every two tentacles. One or two cirri between every two bulbs. One sensory 

 vesicle between every two bulbs. 



Size : Umlirella 25 mm. in width and 10 mm. in height. 



Occurrence : 50 to fathoms. 36 d (1 sjiecimen). 



The specimen is rather macerated. I believe, from the appearance of the gonads, that 

 the medusa has only reached an intermediate stage of development. 



Order HYDROIDA. 



Fam. CAMPANULARIIBiE. 



Campanularia flesuosa, Hincks, 1868. 



Campanularia flexuosa, Hincks, 1868, p. 168, pi. .3.3. 



A few small pieces of this hydroid were taken in the surface tow-nets. The pieces are 

 from the upper part of a colony, and look as if they have only just been broken off. The 

 hydranths are well expanded, and a \'q-w gouothecfe are present. 



Campanularia flexuosa is a fixed hydroid and belongs to the littoral fauna. Its 

 occurrence so far from its usual habitat is probably due to seaweed drifting away from 

 the coast. 



Occurrences: Surface. 24<f,24<g. 



Order TRACHOMEDUS.E. 



Fam. TRACIIYNEMID.E. 



Trachynema eurygaster (Gegenbaur), 1856. 



Sminthea eurygaster, Gegenbaur, 1856, p. 245, Taf. 9. 

 Marmanema mammceforme , Haeckcl, 1879, p. 262, Taf, 1". 

 Sminthea eurygaster, Metscliuikoft', 1886, p. 214, Taf. 1. 

 Trachynema eurygaster, Maas, 1893, p. 12. 



There are ten specimens, of which three are in fair condition. They resemble very 

 closely the figures given by Gegenlmur and Haeckel. 



Tlie umbrella of the largest specimen measured 4 5 mm. in width and 2 mm. in height. 

 The velum is about 1 mm. iu width. There are eight tentacles (all the specimens have 

 the tentacles broken off near to the base), one opposite each of the eight radial canals. 

 The gonads are very small, globular in shape, and are situated quite close to tlie margm 

 of the umbrella, one on each radial canal. 



Occurrences : 100 to fathoms. 35 d (1 specimen), 36 e (2). 

 150 to fathoms. 36/(4). 

 250 to fathoms. 36 h (2), 36 I (1). 



Distribution. — Messina ; Canary Is. ; off the north coast of Brazil in South Equatorial 

 stream. 



This ii a rather rare species. It was taken only once by the ' National ' Plankton 

 Expedition. 



