ZOOPHYTOLOGY. 279 



front, a short, conical rostrum below the mouth, with an avicularium, 

 set obliquely, near the top of it, mandible acute ; in fertile cells, a process 

 on each side, just below the ovicell, aud attached to it, bearing an oval (?) 

 avicularium. Ovicell prominent, with large punctures, somewhat semi- 

 eircularly disposed. Spatulate avicularia thickly scattered amongst the 

 cells. 



Occasionally there occurs on the polyzoary a very stout, co- 

 nical rostrum, bearing a large avicularium, with broad, trian- 

 gular mandible. 



Localities. — Ireland, encrusting stems of Zoophytes, &c. 



Sub-Order Cyclostomata. 

 Pam. 1. Tubulipokiile. 

 Gen. Mecto. 



1. A. iacurvata, n. sp., Hincks. Plate XXX, fig. 6. 



Polyzoarium adnate, linear, curved, tapering ; cells biserial, alternate, 

 bent towards the side, orifices opening out laterally ; surface obscurely 

 punctate. 



Polyzoarium closely adnate, narrow, unbranched, more or less attenu- 

 ated towards the point of origin ; the cells are biserial and alternate 

 (except towards the base of the polyzoary, where they form a single row), 

 and separated by a median line ; they bend towards the side, and project a 

 little beyond the polyzoary, the orifices opening out laterally. 



On stones, coast of Antrim (deep water), not uncommon. 



The Antrim dredgings have yielded a large number of the 

 Cyclostomata, belonging to the genera Tubulipora and Alecto, 

 which I am obliged to reserve for future examination. 



Sub-Order Ctenostomata. 

 Fain. Vesiculakiid^:. 

 Gen. Farrella. 



1. F. dilatata, n. sp., Hincks. Plate XXX, fig. 7. 



Cells tubnlous, sessile, stout, of equal size throughout, opaque, springing 

 from one extremity of a fusiform expansion of the fibre, which is closely 

 adherent, and set round with a number of flattened, spinous projections. 



In this species the delicate, creeping fibre swells out here 

 and there into cell-like expansions, fusiform, adherent, and 

 furnished with a variable number of flattened, spinous pro- 

 cesses. The cells spring from the larger end of these swel- 

 lings. They are stout, sessile, and not contracted at the base, 

 and of a dark, horn colour when dried. The clavate and 

 spinous expansions are analogous to the cell-bearing enlarge- 

 ments of the fibre in yEtea. 



Tsle of Man, on shell, T. H. ; Antrim, deep water, Mr. Uyndman. 



VOL. VIII. Y 



