I92I.] 



A. Robertson: Report oti Bryozoa. 



57 



^;. 



heavily calcified, ornamented with numerous outstanding processes 

 (Fig. lo). Orifice rounded above, possessing in young zofjecia 

 three distinct denticles 

 on the lower margin, 

 the middle one forming 

 a relatively broad muc- 

 ro. Below the orifice a 

 plain non-porou« plat- 

 form [pi.) which in old- 

 er zo(Ecia tends to 

 grow thicker and to 

 extend up each side of 

 the orifice to form the 

 supports of small eleva- 

 ted, sessile, lateral avi- 

 cularia [av.). Frequent- 

 ly one of these lateral 

 avicularia is replaced 

 by an elongated one of 

 considerable size wivh 

 spatulate mandible 



directed downward. 

 {sp.av.). From the 



platform below the orifice there springs a tall urocess which may 

 become bi- tri- or even quadrifid, almost completelj- obliterat- 

 ing the orifice [pr.). The tips of the branches of these frontal 

 processes may acquire small rounded avicularia. Other processes 

 of considerable height, usually tipped with an aviculariurn, may 

 decorate any part of the front wall. Oacia rounded, wall granu- 

 lar or pierced with minute pores. 



A species easily recognized by the unusual number of fantastic 

 processes scattered over the surface of the zoarium. Obtained 

 at Ancutta Reef, Laccadives, at Santapilly, ^ladras, and dredged 

 at 24 to 30 fathoms off the Ganjam coast. 



Fig. 10 — Petyalia laccudivensis, sp. iiov. x 40. 



63. Petralia vultur, Hincks. 



MKcronella v.iltur. Hincks, 188.', 15', vol. \. p. 1O7, pi. \iii. fio-. _.. 



Identification tentative since no comparison with identified 

 specimens has been possible and since certain variations occur 

 here not noted by Hincks. These consist chiefly of numbers of 

 large avicularia found mainly in older parts of the colonies, with 

 mandibles of mucli variety of form. The mandibles of these 

 avicularia are sometimes long and narrow, sometimes duck-bill 

 shaped, and others again are forked at the extremity'. Material 

 fairl}' abundant. Obtained off Gopalpore, Ganjarn district, Madras 

 Presidency, at depths varying from 24 to 30 fathoms; near 

 Mangalore at 31 fathoms ; also at Black Pagoda, Orissa coast, at 

 15 fathoms. 



Other material found at Santapilly and at station 296 (Per- 



