BRITISH ZOOPHYTES. 75 



describes tliis species under the name of T. Dumortierii. 

 He says that " it is so like T. indivisa that one might 

 conjecture that it was that species in miniature, but 

 there can be no doubt of its distinctness, this species 

 being much smaller, and also solitary in habit." 

 The stem is angulated at intervals. 



5. T. BELLIS, All. 



Hab. : Shetland. Height | — 1 in. Stem regularly 

 marked by annulations. " Coenosarc orange, deepening 

 in tint towards the base, expanding into a collar 

 immediately below the polypites. Polypite 5 lines 

 across, scarlet. Proximal tentacles 20 ; distal 15 — 20, 

 all white.'' 



" An exquisite little hydroid." — Allman. 



6. T. Britannica, Pennington. Plate III. fig. 8. 



Hab. : Menai Straits. Height about 1 in. Coeno- 

 sarc orange, ringed at the base. Polypite large, 

 crimson, borne on a collar-like extension of the 

 coenosarc. Distal tentacles crimson, 15. Proximal 

 tentacles white, long, about 30. Gonophores oval, on 

 white-branched peduncles, 3 — 6 in a cluster. 



I found this species in May last, whilst collecting 

 in the Menai Straits. At fii-st I thought it identical 

 with the preceding, but it will be seen to have several 

 distinguishing features. I found it near the base of 

 the Britannia Tubular Bridge, hence the specific 

 name. 



7. T. ATTENUATA, All. 



Hab. : Firth of Forth and Shetland. Height 3—4 in. 

 This is a deep-water species, somewhat resembling 

 T. simplex, Aid. 



8. T. HUMILIS, All. 



Hab. : Kinsale Harbour. Height 1 in. 



