ZOOLOGICAL AND BOTANICAL ASSOCIATION. 77 



Fam — Cellepobid-e. 

 Gen. Cellepora. 

 I. Cellepora artnata, n. sp. (Hincks). Plate III., Fig. 5. 

 Polyzoary adnate, spreading ; cells smooth, sub-erect (except towards 

 the margin), ventricose, distinct, orifice orbicular, slightly produced below ; 

 peristome thin and raised; a stout rostrum in front, with an avicularium 

 at one side, immediately below the apex, mandible acute, and pointing up- 

 ward ; large spoon-shaped avicularia distributed over the polyzoary, in the 

 intercellular spaces. • 



In this species the avicularium is placed at the top of the rostrum, 

 looking to one side. The broad triangular mandible points upward. 

 The rostrum is much stouter and more obtuse than in C. pumicosa. 



Localities. — Coast of Antrim, on shell (Mr. Hyndman) ; Dogger 

 Bank and coast of Devon (T. H.). 



II. C. avicularis, n. sp. (Hincks). 



A Cellepora occurs in considerable plenty on Irish zoophytes, &c, 

 in the Trinity College Collection, which seems to be undescribed. The 

 following are its characters : — 



Polyzoary encrusting or spreading, variable in its mode of growth; 

 cells ovate, ventricose, smooth, orifice orbicular, with a deep sinus in front, 

 a short, conical rostrum below the mouth, with an avicularium, set ob- 

 liquely, near the top of it, mandible acute ; in fertile cells a process on 

 each side just below the ovicell, and attached to it, bearing an {oval?) avicu- 

 larium ; ovicell prominent, with large punctures somewhat semicircularly 

 disposed ; spatulate avicularia thickly scattered amongst the cells. 



Occasionally there occurs on the polyzoary a very stout, conical ros- 

 trum, bearing a large avicularium, with broad triangular mandible. 



Ireland, encrusting stems of zoophyte, &c. 



Sub-Order —C YCLOSTOMATA . 



Fam . — TlTBULIPORIDiE . 



Gen. Alecto. 

 I. A. incurvata, n. sp. (Hincks). PI. III., Fig. 6. 

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

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

 punctate. 



