122 CEYLON PEARL OYSTER REPORT. 



another locality resembles this so nearly as to make it probable it is one of the same 

 species. The zocecia are larger, avicularia are smaller and turned sideways, as in 

 Smut's figures. Ocecia are present here, but are punctured, not striated, and they are 

 often half buried in the calcification of the zoarium. There is still a third variety, 

 smaller than either of the above, and with a smooth and glistening surface, with 

 avicularia turned sideways and ocecia faintly striated, but with a small arched area in 

 front. As all these three specimens have the same key-shaped orifice and pointed 

 avicularia I am inclined to think them varieties of the one species. 

 Localities : Gulf of Manaar ; and off Galle. 



Lepralia ceylonica, n. sp. -Plate, fig. 11. 



Zoarium adhering, of a yellowish-white colour. Zocecia in linear series closely set, 

 becoming upright in places, with glistening front walls, pitted and punctured and 

 lumpy. Orifice arched above, with straight sides and slightly concave lower lip, six 

 long sharp spines above and several bosses below the orifice, carrying small avicularia 

 with pointed mandibles on their summits. Ocecia roughened like the zocecia and 

 having scattered raised avicularia upon them. 



Locality : Gulf of Manaar. 



Lepralia fissa, n. sp. Plate, fig. 12. 



Zoarium incrusting, forming brown patches. Zocecia finely punctured at the outside 

 of the colony, becoming coarsely ridged further in and having a large limbo occupying 

 most of the area, and a large avicularium on its outer side, with the mandible directed 

 upwards. Orifice broader than long, with a pouting lower lip. Ocecia rounded, 

 smooth, with a large cone-shaped fissure in front. 



Locality : Oft' Galle, deep water. 



Lepralia subimmersa, MacGillivray (23). 



There is one colony, greyish-white in colour, and covering the shell of a univalve 

 mollusc inhabited by a hermit crab. Another colony is of a deep red colour, from a 

 membranous covering still adhering to the zoarium. 



Locality : Gulf of Manaar. 



Escharoides verruculata (Smitt, 26). 

 Localities : Gulf of Manaar ; and off Mount Lavinia. 



Porella malleolus, Hincks (8). 

 Localities : Gulf of Manaar ; oft' Galle ; Navakaddu Paar. 



Smittia trispinosa (Johnston). 

 There is great variety in the form of zocecia and avicularia among the Ceylon 



