THORNELY— MARINE POLYZOA OF THE INDIAN OCEAN 149 



appears to be narrower and more rounded below, the avicularium has a small, pointed 

 mandible as in fig. 2, pi. 138, and above it there is a swollen semi-lunar area. The zooecia 

 are about half the size of S. triangula. 



Saya de Malha, 150 fath. 



65. Schizoporella subsinuata, Hincks, Ann. Mag. Nat. Hist., ser. 5, xiv, 1884, p. 280. 



There is a small, old colony adhering to a Cellepora, it resembles MacGillivray's* 

 species in having avicularia, but these are smaller than his and turn various ways, 

 usually there is a pair, one on either side of the orifice high up, sometimes a double 

 pair ; all are raised on small bosses and slightly pointed. 



Saya de Malha. 



66. Schizoporella dutertrei (Aud.) var. pes-anseris (Smitt). 

 Hippothoa pes-anseris, Smitt, Floridan Bryozoa, 1872, p. 43. 

 Providence, 50 — 78 fath. 



67. Schizoporella hyndmani (Johnston). Hincks, Brit. Mar. Pol., p. 281. 



The peristome of this species is very much raised, concealing the primary orifice, it 

 is elliptical, not tubular, and the upper and lower margins, being more developed than the 

 lateral, gives a two-lipped appearance. The ooecium is situated behind this and does not 

 quite reach to the top. The mandibles of the avicularia ai'e not very long. The surface 

 of the zooecium is smooth, but there are faintly seen perforations on some. The front wall 

 is raised at the sides and flattened centrally. 



Providence, 50 — 78 fath. 



68. Gemellipora glabra, form striatula, Smitt, Floridan Bryozoa, p. 37, 1872. 

 Amirante, 22—85 fath. ; Saya de Malha, 29—125 fath. 



69. Gemellipora lata, Smitt, Floridan Bryozoa, p. 36. 

 Saya de Malha, 29 fath. 



70. Rhyncozoon bispinosa (Johnston). 



Rhynchop>ora bispinosa, Hincks, Brit. Mar. Pol., p. 385. 



There is a small, pinkish white colony of this species. The primary orifice is very 

 slightly sinuated, the front wall covered by small, rounded avicularia, one of them larger 

 and longer, having a blunt end and lying below the orifice, crosswise. There are several 

 rounded spine-like processes round the margin, besides the umbo, which cai-ries an avicu- 

 larium on its side. 



Saya de Malha, 29 fath. 



71. Rhyncozoon incisor, Thornely, Hei'dman's Rep. on Pearl Oyster Fisheries, 1905, 

 p. 118. 



* Prod. Zool. Vict. Dec. xiv, p. 147. 



