112 
Z. HYDROIDA. 
Hermia. 
the tentacula shorter than the enlarged heads of the branches . 
Gsertner. 
Vignette, No. 12, and Plate IV. Fig 1, 2. 
Tubularia Coryna, Turt. Gmel. iv. 668. Turt. Brit. Faun. 210. Stew. 
Elem. ii. 438. Bose. Vers. iii. 91 Hydra raraosa, Fabric. Faun. 
Grcenl. 348 Coryne Glandulosa, Lam. Anim. s. Vert. ii. 62. 2de 
edit. ii. 74. Fleming in Edin. Phil. Journ. ii. 87, and viii. 295. Flem. 
Phil. Zool. ii. 616, tab. v. fig. 2. Flem. Brit. Anim. 553. Encyclop. 
Method, tab. 69. fig. 15, 16. Johnston in Trans. Newc. Soc. ii. 253 ; 
and in Mag. Nat. Hist. v. 631. fig. 110. C. glanduleuse, Blainv. Ac- 
tinol. 471. pi. 85, fig. 3, 3 a Coryne, Lister in Phil. Trans, an. 
1834, p. 376. pi. 10. fig. 3. 
Hah. On the under surface of stones between tide-marks ; on old 
shells, and often parasitical on Tubularia indivisa. Isle of May ; and 
on the Bell Rock on the coast of Angus, Rev. Dr Fleming. May- 
bole, Ayrshire, Geo. Gray. Brighton, Mr Lister. Scarborough, 
Mr Dean. Berwick Bay. 
Polypes adherent by a tubular fibre which creeps along the surface 
of the object on which they grow, seldom an inch in height, irregu- 
larly branched, the stem filiform, tubular, horny, subpellucid, wrink- 
led and sometimes ringed at intervals, especially at the origin of the 
branches, each of which is terminated with an oval or clubshaped 
head of a reddish colour, and armed with short scattered tentacula 
tipt with a globular apex. The ends of the branches are not perfo- 
rated, but completely covered with a continuation of the horny sheath 
of the stem. The animal can bend its armed heads at will, or give 
to any separate tentaculum a distinct motion and direction, but all its 
movements are very slow and leisured. 
When parasitical on Tubularia this zoophyte surrounds the stalks, 
for the space of an inch or more, with a thick beard-like mossiness 
composed of entangled corneous fibres, not coarser than a sewing 
thread, and more irregularly branched than when the polypes have 
greater freedom to spread. This variety is figured on Plate IV. Fig. 
1, 2. The stem is filled with a pulpous medulla, enlarged in the 
heads and continued up the tentacula, the round tips of which ap- 
peared to be smooth and areolar under a magnifier, but Mr Lister 
says they are covered with iC short projections like blunt hairs,” 
“ and it seems to be by their means that the polypi attach with a 
touch, or release at will, substances that drift within their reach.” 
Mixed with the tentacula, on some heads, there are a few round and 
larger bodies of a deep red colour in the centre with a transparent al- 
buminous envelope : these are supported on a very short stalk, and 
are evidently the gemmules by which this species is propagated. 
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