38 NATURAL HISTORY OF 



pites light rose-colour. Tentacles 20. A doubtful 

 species, probably a variety of G. vitiUicornis. 



Prof Allman found it in rock-pools at low water in 

 the Shetland Isles. It is described and figured by him 

 (G. H. 247, Plate II. 3, 4) . He considers it a separate 

 species on account of the scattered condition of its 

 gonophores. 



Genus II. Tubiclava, Allman. (Tubus, a tube.) 

 Polypites claviform, elevated on distinct stems 

 arising from a creeping stolon, the whole clothed with 

 a polypary. Oonophores borne on body of polypites 

 behind posterior tentacles, or on the summit of very 

 short stems (Blastostyles, Allman) developed from the 

 stolon {T.H.). 



This diagnosis includes the species T. cornucopice, 

 for which Prof. Allman establishes the genus Merona, 

 based on the possession by that species of blastostyles 

 (G. H. 257). 



1. T. LUCERNA, All. 



Hab. : On loose stones, Torquay, Dublin Bay (All.). 

 Height ^ in. Polypites very minute, polypary yellowish- 

 brown ; polypites white, with pale ochreous centre. 



2. T. PEUTICOSA, All. 



Hab.: Tenby {AIL). Height 4—5 lines. Stem 

 branched. Polypary smooth, straw-coloured. Polypites 

 vermilion. Tentacles 14 — 18. 



3. T. CORNUCOPIA, A. M. N. 



Merona cornucopiae [A. M. N., All.). Height j in. 

 Stem consisting of trumpet-shaped tubes. Polypites 

 with elongate claviform heads. Gonophores borne on 

 short stems or atrophied polypites (blastostyles). 



Mr. Norman and Prof. Allman refer this species to a 

 genus Merona, based upon the last-named characteristic. 



