170 ME. E. T. BEOWKE — BISCAYAN PLANKTON : 



suitable for small medusae; I prefer them for travelling purposes to glass-stoppered 

 bottles. The formalin does not dissolve out the tannin from the cork, as alcohol does. 

 It is a mistake to pack small specimens in cotton-wool, they only get crushed by the 

 weight of the wool. Simply fill the bottle to the brim with formalin, and gently 

 hammer in the cork with a light wooden mallet. With a little care a large air-bubble 

 can be avoided, and a tiny one is fairly harmless, provided that it cannot touch the 

 specimen. As a precaution against leakage and evaporation it is advisable to seal the 

 cork, when it has become quite dry, with hard paraffin- wax. 



HYDKOMEDUS^. 



Order ANTHOMEDUS^. 

 Tam. Makgeliid^. 

 Margelis autumnalis (Hartlaub), 1897. 

 Bougainvillea autumnalis, Hartlaub, 1897, p. 465, Taf. 15. 



An adult specimen. Umbrella about 2'5 mm. in diameter. Gonads large. About 

 six to seven tentacles on each of the four perradial bulbs. 

 Occurrence : 25 to fathoms. 33 g (1 specimen). 

 Distribution. — North Sea ; English Channel ; west coast of Ireland. 

 This species belongs to the neritic fauna; its hydroid is at present unknown. 



Order LEPTOMEDUSiE. 



Earn. EucoPiD^. 

 Obelia lucifera (Forbes), 1848. 



Thaumanlias lucifera, Forbes, 1848, p. 53, pi. 10. 



Six specimens, none of which have ripe gonads. 



Occurrences : Surface, 21 e (1 specimen) ; 23 b (2), 23 d (1), 24 g (1). 100 to fathoms, 

 25 d (1). 



This species belongs to the neritic fauna. It is at present uncertain to which hydroid 

 species Obelia lucifera belongs. 



TiMA sp. ? 



Description. — The umbrella is thick, moderately curved, and more than twice as broad 

 as high. The velum is narrow. The stomach is very small and flat ; it is situated upon 

 a broad, short, somewhat cone-shaj)ed peduncle. The mouth is small and has a folded 

 margin. Eour narrow radial canals. The gonads are immature, and are situated upon 

 the radial canals, probably extending along nearly their whole length. About 



