NORTHUMBERLAND AND DURHAM. 117 



The position and character of the cells in this species show an 

 approximation to the following genus. 



10. THUIARIA, Fleming. 



1. T. THUiA, Linn. 



Johns. Brit. Zooph., 83, t. xvii. and xviii., f. 1,2. 

 On shells from deep water; frequent. 



2. T. ARTICULATA, PallciS. 



Johns. Brit. Zooph., 84, t. xviii., f. 3, 4. 

 From deepish water; rare. Whitburn. — Miss Dale. Cul- 

 lercoats. — J. Coppin^ Esq. Dredged in deep water, and 

 also cast on shore at Tynemouth. — Miss Forster. From 

 the deep-water boats. — J. A. 



11. ANTENNULARIA, Lamarch 



1. A. ANTENNiNA, Linn. 



Johns. Brit. Zooph., 86, t. xix., f. 1, 3. 

 From the coralline zone and deep water; frequent. 



2. A. RAMOSA, Lawk. 



Johns. Brit. Zooph., 88, t. xx. 

 On shells and stones in the same situations as the last, but 

 less common. Not unfrequent at Seaton. — J. Hogg, Esq. 

 Much difference of opinion has existed concerning the distinct- 

 ness of these two species of Antennularia, arising from an imper- 

 fect examination of their minute characters. As might be 

 expected from their general appearance and habit, the species are 

 undoubtedly distinct, though some confusion has arisen from an 

 erroneous character being fixed upon for dividing them. The 

 absence of the small tubulce, or trumpet-shaped processes between 

 the cells, has been pointed out as distinguishing A. ramosa from 

 A. antennina; but the fact is that the tubules exist in both spe- 

 cies, and exactly in the same number and position, as I have 

 satisfied myself by a careful examination of specimens both from 

 our own coast and from the south of England; those of A. ramosa 

 being generally a little smaller and tapering more at the base. 



