40 ANTIIOZOA HYDROIDA. 



tubular, horny, subpellucid, wrinkled and more or less distinctly 

 ringed, especially at the origin of the branches, which are of the 

 sarae size and structure as the primary stalk. Each branch is ter- 

 minated with an oval or club-shaped head of a reddish colour, 

 armed with short scattered tentacula tipt with a globular apex. 

 The ends of the branches are, apparently, not perforated, 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, in general, very slow and leisurable. 



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 zoophyte is much infested with parasites, and I have seen 

 specimens so completely overrun with Vorticellae and young Con- 

 fervse, that they appeared, under the microscope, nearly as mossy and 

 glandulous as the stalks of the moss-rose. 



As the original description of Gsertner is contained in a book 

 now seldom to be met with, I am induced to give it here entire : — 

 CoRYNE PUSiLLA. " Stirps subramosa, filiformis, papyracea, geni- 

 culata, basi angustior, absque radiculis adnata fucis, prossertim 

 foeniculaceo ; coloris nunc arenacei nunc saturate rubri. Caulem et 

 ramos terminant capsulaa ovato-acuminatse, apice foramine vel ore 

 varie dilatabili perforatse, eodem cortice (paulo tantum molliore) quo 

 reliqua stirps vestitae, atque per omnem superficiem armatse tenta- 

 culis cylindricis, apice globosis, aqueo-diaphanis, non retractilibus. 

 Caulis et rami mucosa gelatina, capsulao autem paulo duriore came 

 intus repleta sunt ; hse tamen ita, ut rugosa supersit cavitas re- 

 cipiendis cibis destinata. Ad basin capsularum majorum adultio- 

 rumque exigua ssepe verruca vel tuberculum conspicitur, an pro- 

 lifera gemmula 1" Addit Gsertnerus : " a Tubularia ut non longe 

 distet Coryne, ab ea tamen differre, ipsissima tua verba, Elench. 

 Zoojih. p. 79, 80, suadent. Caput Corynes pro lubitu animalis 

 retractile non est, nee pinnulis, sed veris tentaculis, utut pariter 

 non retractilibus instructum ; tentacula enim ilia quidquid est 

 idone?e prgeda3 arripere, junctisque, si opus, viribus illud ori admovere 

 ipse plus semel vidi, ut de usu eorum dubium nullum sit. Cortex 

 prteterea capitis pro transmittendis tentaculis perforatus, itidem non 

 lente inter utrumque horum Zoophytorum discrimen prsebet." 



