24 



ZOOPHYTOLOGY. 



At the Meeting of the British Association, at Cheltenham, 

 a " Notice," by Mr. J. Alder, was read of several new spe- 

 cies of Hydrozoa and Polyzoa, found by him on the coasts of 

 Northumberland and Durham. The entire number of species 

 described amounted to thirteen, but we are here able to give 

 only those belonging to the class Polyzoa, — four in number. 



Class. Polyzoa. 



Ord. P. infundibulata. 



Sub-ord. Ctenostomata (s. Vesicularina). 



1. Pam. Vesiculariadae. 



Geu. 1. Btiskia, Alder, nov. gen. 



Polyzoary corneous, consisting of a slender, tubular, creeping fibre, with 

 cells developed at intervals. Cells ovate, adhering through their whole 

 length ; generally with lateral spine-like processes, also adhering ; orifice 

 terminal and circular. Polypide with eight tentacles, issuing from a sheath 

 of fasciculated setse. , 



B. nitens, Alder, n. sp. PL XIII, figs. 1, 2. 



Minute, horn-coloured, shining; crec})ing fibre filiform, branching or 

 anastomosing, with occasional short spinous offsets; cells ovate or flask- 

 shaped, rather ventricose, tapering towards the orifice, the margin of which 

 is thickened, and slightly nodulous ; sides of the cells produced into irre- 

 gular spines adhering to the substance on which it creeps. Length of 

 cell, sflth inch. 



On Plumularia falcata, Campanularia pltimosa, &c., from deej) water, 

 Northumberland coast, rare. 



This interesting little zoophyte has probably hitherto 

 escaped observation from its minuteness. The spine-like 

 processes at the sides give the cells an insect-like appearance ; 

 they are irregular and occasionally wanting. The cells are 

 also subject to some variation in form, especially in the size 

 of the aperture ; they lie nearly parallel to the stem, which 

 frequently divides, and runs along each side of them, clasped 

 by the lateral processes. 



Farrella pedicellata, n. sp. PI. XIV, figs. 1, 2, 3. 



Body ovate-obloug, yellowish, transparent, with long and very slender 

 pedicles, uniform in thickness throughout ; tentacles 12. Length of cell, 

 ajjtli inch. 



On old shells of Jiuccinum undatum and Fusus aniirjuus, from deep water, 

 CuUercoats; not uncommon. 



