TUBULARIA SIMPLEX. 121 



[Belgium (Van. Beu.) : mouth of the Elbe (Kirchen- 

 pauer) : Denmark (Abildgaard) : Sars records the occur- 

 rence of a Tubularia at Messina under the name of T. 

 larynx, which he identifies with the T. coronata of Van 

 Beneden. He states that the same species is common in 

 the North Sea.] 



4. T. SIMPLEX, Alder. 



TUBULARIA DUMORTIERII, Johnst. B. Z. 50 ; Alder, Trans. Tynes. F. C. iii. 106. 

 ,, SIMPLEX, Alder, Supp. North. Cat. in Trans. Tyncs. F. C. v. 232, 

 pi. viii. figs. 3, 4. 



Plate XXII. fig. 1. 



STEM slender, smooth, unbranched, without cumulations, 

 generally a little angulated at intervals and tapering to- 

 wards the bottom, horn -coloured, usually solitary and 

 attached by a short creeping base; POLYPITE slender, 

 rose-coloured; tentacles whitish, the oral biserial, shorter 

 and less numerous than in T. indivisa ; the aboral 20-24, 

 moderately long. 



Height 2 to 2^ inches. 



THE tubes of this species are exceedingly slender, and the 

 angulatioii seems to be a pretty constant character. The 

 smaller size and the solitary habit distinguish it from T. 

 indivisa. When living, the stems appear orange or scarlet, 

 from the contained coenosarc. 



Dr. Johnston has given a very accurate description of 

 this form, but referred it to the T. Dumortierii of Van 

 Beneden, from which it differs widely. He says that the 

 gonophores are spherical and shortly stalked. 



Hab. On shells and other marine bodies from deep water, 

 Cullercoats (J. A.) : Berwick Bay (Dr. Johnston) : Oban, 

 on stone (T. H.). 



