EUDENDRIUM INSIGNE. 337 



5. EUDENBRIUM INSIGNE, Hilicks. 



Plate XIV, figs. 4—6.' 



EuDENDRiuJi HUMiLE, — AUmaii, in Ann. Nat. Hist, for January, 1863. 



EuDENDRiuM INSIGNE, — Hiiicks, in Ann. Nat. Hist, for August, 1861 ; Brit. Ilj-dr. Zooph., 



p. 80, pi. xiv, fig. 3. 



TROPHOSOME. — Hydrocaulus much ami irregularly branched, rising to a 

 height of about three quarters of an inch ; perisauc distinctly annulated throughout. 

 Htdranths with a shallow circidar groove near their base. Tentacles twenty or 

 twenty-three, with the alternate ones usually elevated and depressed in extension. 



GONOSOME. — Male sporosacs two-chambered, forming a verticil round the 

 body of the hydranths, and springing each by a short stalk from the circular groove 

 which passes round the hydranth near its base. Female sporosacs piriform, borne 

 both by the body of the hydranth and by the hydrocaulus immediately below it. 



Colour. — Hydranths \ellowish vermilion. Male gouopliores piuk; female gonophores 

 reddish orange. Perisarc reddish brown. 



Development of Gonosome. — September. 



Habitat. — Rock pools near low-water spring tides. 



Batht/metrical distribution. — Laminarian zone. 



Locality. — Torbay, Mr. Hincks and G. J. A. ; Ilfracombc and Swanage, ]\Ir. Ilincks. 



Some years ago I described as a distinct species, under the name of Eudcndrium Iiumile, a 

 little hydroid from Torquay. I was aware at the time that Mr. Hincks had already described, 

 under the name Eudcndrium insiyne, a species of Eudendrium which, judging from his description, 

 resembled in some points my E. hiimile, though in other more important ones it differed from it 

 so widely as to forbid the association of the two in a single species. 



Subsequent observations have induced Mr. Hincks (' Brit. Hydi'. Zooph.,' p. S5) to correct 

 his original description, and in its present form it will easily apply to my Eudendrium himUe. I 

 am therefore willing to accept Mr. Hincks' view, that the two species are identical, and to 

 suppress the name of Jiumile in favour of insiyne. 



I met with this pretty little Eudendrium on the rocky shore of Torba\', where it occurred 

 rooted to the bottom of the clear pools near the limit of the lowest tides. ^Mr. Hincks found it 

 in the same place, and in some other parts of the southern shores of England. 



' Tlie species is there figured under the name of Eudendrium liumile. 



