184 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



Sub-order III.— CTENOSTOMATA, Busk. 



Syn. Halcyonellea and Vesicularina, Jolmston. 



Group a. l)alCBonellea, Ehrenberg. 



Syn. Alcyonidulce, Johnst., Brit. Zooph., edit. 1. 

 Polyzoa carnosat Gray. 



Family I. — Alcyonidiid^. 

 Syn. AlcyonidulcB, Couch. 

 Halcyonellece, Smitt. 



Genus Alcyonidiuyn, Lamouroux. 

 Syn. Alcyonium (part), Linn, Pallas, &c. 



Cycloum, (sp.), Hassall. 

 Nine British species. 



Alcyonidium gelatinosum, Linnaeus. 

 Sea ragged staff, Ellis. 

 Alcyonium gelatinosum, Linn., Pallas, Ellis and Sol., Lamx., &c. 



This species is very abundant in our district, and grows 

 to an enormous size. 



Isle of Man and Llandudno (Hincks). Dredged in the 

 '* Hyena " Expedition in the Menai Straits opposite Bangor, 

 and in a deep hole off the Point of Air in the " Spindrift " 

 Expedition. Hilbre (Marrat). 



Alcyonidium hirsutum, Fleming. 

 Alcyonium hirsutum, Flem. 

 Cycloum papillosum^ Hassall, Johnst., Byerley, &c. 



Isle of Man, Llandudno, Menai Straits (Hincks). Dredged 

 off Port Erin (ten to fifteen fathoms) by Prof. Herdman, and 

 by Mr. Thompson off Penmaenmawr. 



Alcyonidium mytili, Daly ell. 

 Syn. Alcyonidium hexagonum, Hincks, Alder 

 Alcyonidium parasiticum, Smitt. 



Llandudno. Isle of Man, common. Menai Straits 

 (Hincks). 



