POLYZOA. 119 



with, sometimes, an umbo. The orifices of fertile zooecia are much larger than those 

 of the others. 



Locality : Gulf of Manaar. 



J 



Gemellipora protrusa, n. sp. Plate, fig. 7. 



Zoarium incrusting, of a pale brown colour. Zocecia rhomboidal, smooth or slightly 

 roughened, front wall much raised, punctured round the margin. Orifice of the usual 

 Gemellipora form, sometimes much elongated ; peristome often raised above and 

 irregularly lobed. A large avicularium on the front of the zocecium, directed across it, 

 supported on a raised process ; mandible wide at the base, becoming long and pointed ; 

 a small avicularium, with rounded mandible, on a raised jjrocess on one or both sides 

 of the orifice. Ocecia granular and minutely punctured, open in front, and leaning 

 forward over the orifice. 



Locality : Gulf of Manaar (numerous colonies on Nullipore balls). 



There are sometimes two avicularia, in place of the one large transversely placed 

 one ; they point outwards to either side of the zocecium. There is some resemblance 

 in the appearance of this species to Schizoporella ampla, Kirkpatrick (20). 



Family: ESCHARHLE. 



Lepralia robusta, Hincks (8). 



The central circular pore, alluded to by Hincks, is quite evident on the present 

 specimens, and is sometimes multiplied to three or more of irregular shapes, as seen 

 in an old, worn specimen. 



Locality : Gulf of Manaar (in large quantity on broken shells). 



Lepralia poissonii, Audouin. 

 Localities: Navakaddu Paar ; off Galle and onwards up West Coast, deep water. 



Lepralia mortoni, Haswell (19). 

 Localities : Gulf of Manaar ; off Trincomalee ; north end of East Cheval Paar. 



Lepralia triangula, n. sp. Plate, fig. 8. 



Zoarium incrusting. Zocecia punctured all over, covered by a yellow membrane. 

 There are usually scattered spinous processes on the front wall of the zocecium and also 

 two curved horn-like processes, one on either side below the orifice, which may be 

 avicularia. Orifice longer than broad, with a much raised, thin, often irregularly 

 pointed peristome, forming a collar round it. Operculum with a triangular 

 excrescence having its base attached to the base of the operculum. No ocecia. 



Locality : Gulf of Manaar. 



It is possible this species may be a variety of L. pallasiana, Moll., as it resembles 

 L. canthariformis, Busk, which is probably a variety of L. pallasiana, but the 



