CORYMORPHA NTITANS. 127 



1. C. NUTANS, Sars. 



COUYMORPHA NUTANS, Sars, ' Beskrivclser ' &c. 7, pi. i. fig- 3; Forbes Sf Good- 

 sir, Ann. N. H. for 1840, (1st ser.) v. 310; Johnston, B. Z. 

 54, pi. vii. figs. 3-6 ; Hodge, Trans. Tynes. F, C. v. 80, pi. ii. 

 figs. 1-10 ; Alhnan, Ann. N. H. for January 1863. 



Plate XXII. fig. 2. 



STEM subcylindrical, tapering slightly upwards, and enlar- 

 ging at a short distance above the blunt, conical base, of a 

 pinkish colour, traversed by reddish-brown longitudinal 

 lines; POL YP A RY a transparent membranous tube; POLY- 

 PITE of a pink colour ; oral tentacles very numerous (about 

 80), delicate, very contractile, arranged in several alter- 

 nate series ; aboral tentacles about 30, white, long, and 

 tapering. 



GONOZOOIDS naked, borne in clusters on the extremities of 

 the branched stalks ; UMBRELLA (at the time of libera- 

 tion) almost globular, slightly narrowed towards the 

 aperture, continued above into a short conical apex tra- 

 versed by a canal, with a broad velum and of a pale 

 yellowish-brown colour; MANUBRIUM large, subcylin- 

 drical ; MARGINAL BULBS reddish- brown, with carmine- 

 coloured spots, one, larger than the rest, bearing a single 

 tentacle, the others without tentacles ; the tentacle very 

 extensile, beaded with spherical clusters of thread-cells, 

 of which the terminal one is the largest. 



Size, at the time of liberation, about -^ of an inch in 

 diameter. 



THE lined appearance of the stem in Corymorpha is due to 

 the presence of a number of longitudinal canals excavated 

 in its substance, through which the nutrient fluid circu- 

 lates. The arrangement of these canals is much the same 

 as that met with in Tubularia. 



The lower tentacles possess little contractility, differ- 



