THE ANNA L S 



AND 



MAGAZINE OF NATURAL HISTORY 



[SECOND SERIES.] 

 No. 107. NOVEMBER 1856. 



XXX. — A Notice of some New Genera and Species of British 

 Hydroid Zoophytes *. By Joshua Alder, Esq. 



[With three Plates.] 



Having had occasion lately to examine the zoophytes of the 

 coasts of Northumberland and Durham for the purpose of draw- 

 ing up a local Catalogue for the Tyneside Naturalists' Field Club, 

 I have been so fortunate as to meet with several undescribed 

 species, some of which have not been before observed, and others 

 have been misunderstood or passed over as varieties. The 

 species here described belong to the Anthozoa Hydroida of 

 Johnston. 



Family Corynidae. 



VORTICLAVA, nOV. gCU. 



Polype linear-cylindrical or clavate, soft, naked, affixed at the 

 base, solitary ? Head terminal ; tentacles in two rows, stout, 

 dissimilar, the upper row capitate. 



Vorticlava humilis, n. sp. PI. XII. figs. 1-4. 



Body white, semitransparent, nearly of equal thickness through- 

 out; upper tentacles five, short and stout; lower tentacles 

 ten, about three times the length of the upper. 



Length of body y% inch. 



On Corallina officinalis, in a rock-pool between tide-marks, 

 Cullercoats. 



* Read at the late Meeting of the British Association for the Advance- 

 ment of Science at Cheltenham. Four new species of Polyzoa, forming a 

 part of the communication then read, have been published in the 1 7th Num- 

 ber of the Journal of Microscopical Science. 



Ann. ^ Mag. N. Hist. Ser. 2. Vol. xviii. 23 



