NORTHUMBERLAND AND DURHAM. Ill 



obtained at Cullercoats in 1853. A single compound stem rises 

 in a curve to the height of five or six inches : this is very slightly 

 branched, the branches inclining mostly to one side ; the branch- 

 lets had been rather thickly set with cells, which appear also to 

 have had a sub-unilateral character. The specimen is old, and 

 neither cells nor vesicles remain, so that any further description 

 of it must be left till a future and more favourable opportunity. 

 The colour is dark brown. Its general contour somewhat resem- 

 bles that of Plumulcaia myriophyllum. 



9. SERTULARIA, Linnceus. 

 * Cells distinctly alternate (Sertulm^ella, Gray). 



1. S. POLYzoNiAs, Linn. 



Johns. Brit. Zooph., 61, t. x., f. 1 — 3, and wood- 

 cut 8 a, b. 

 On other zoophytes, shells, and sea-weeds, from beyond low 



water mark to deep water; not uncommon. 

 Var. /d Johns. " Caulescent, pinnate," has occurred only once. 

 A variety with wrinkled cells is occasionally met with. This 

 may be the same as Dr. Johnston considers to be a variety of 

 aS'. rugosa^ "which in habit and in the remoteness of its cells 

 resembles Sert jpolyzonias^ There can be little doubt, however, 

 that it belongs to this species, as I have obtained a specimen 

 with the cells wrinkled on one side of the branch, and plain on 

 the other. The wood-cut in Brit. Zooph. (f. 8 c) represents 

 *S^. tenella. 



2. S. TRICUSPIDATA, n. sp. PL IV"., fig. 1, 2. 



Stem slender, alternately branched, twisted at intervals, 

 and jointed above each cell : cells alternate, rather distant, 

 smooth, exactly cylindi'ical, a little bent outw^ards, with 

 a three-toothed rim; ovicapsules strongly ribbed across, 

 with a narrow funnel-shaped aperture. Height 1 t<j 2 

 inches. 



On other zoophytes from the deep-water or five-men boats, 

 that supply Newcastle market with fish during the spring 

 months; not rare. 



VOL. HI. PT. II. o 



