276 SYNCORYNE LOVENI. 



iiiimed l)y Loven, but not described by liiui with sufficient detail for satisfactory diagnosis. In 

 this determination I ha\c followed Sars, though it must be admitted that, if Lovcn's observation as 

 to the occurrence in his species of certain gonophores which occupy the position of a hydranth on 

 tlie extremity of a branch be free from error, it is not easy to accept unhesitatingly the specific 

 identity of the two hydroids. It is possible, however, to explain the peculiar position of the 

 medusa in Lovcn's specimens by referring it to the atrophy of a hydrantli which may at one 

 time have terminated the branch, and by its subsequent disappearance have allowed the medusa, 

 properly lateral, to assume an apparently terminal position. 



The Si/ucori/ne Sardl is one of the hydroids which form the subject of Loven's famous 

 ?»lemoir, in which he shows the production of ova, by medusiform buds, and is thus one of the 

 first in which the production of medusa buds was noticed and described by a competent oliserver. 



*:j^* 2. Syncokyne Lovexi, Sars. 



SyNCORYNE iiACE.MosAj — Lovcu, in Trans. Hoy. Acad, of Sciences of Swedeu, 1835, trans- 

 lated in Wiegmau's Archiv, 1837, Band i, p. 321, tab. vi, 

 figs. 19, 20. 



Syncoryne Loveni, — Sars, Fauna Ht. Norv., p. 2, note. 



TROPHOSOME. — Hyduocaulus much branched, formhig intricate, flexuous, and 

 shrubby growtlis, which rise to a height of an inch and a half. Hydranths with 

 sixteen tentacles. 



GONOSOME. — Planoblasts permanently attached, borne on short peduncles, whicli 

 spring from the body of the hydranth, just behind the posterior tentacles. Umbrella 

 elongate, bell-shaped, set with scattered thread-cells ; marginal tentacles rudimental ; 

 manubrium, with its investing mass of ova, nearly filling the cavity of the umbrella, 

 and witli its mouth minute, and surrounded by a circle of rudimental tentacles. 



llahitaf. — On a rocky bottom among shells and sea-weeds. 

 Bathi/iiietrical distribution. — Laminarian zone ? 

 Locality. — Coast of Norway, Loven and Sars. 



I have never met with this apparently well-marked species, and the diagnosis here given is 

 framed from Loven's memoir. 



Spicoryne Loveni possesses much historical interest as having, along with Sijncoryne Sarsii and 

 Gonotliyraa Loveni {Campamilaria yenicidata of Loven), formed the subject of Loven's memoir, m 

 which Ehrenberg's views of the zooidal and sexual nature of the egg-bearing bodies of the 

 Hydkoida were for the first time confirmed. 



Loven names the species Syncoi-ync rainosa, believing it to be identical with the Stipida 



