146 PERCY SLADEN TRUST EXPEDITION 



43. Tuhucellaria cereoides, var. chuakensis, Waters, Journ. Linn. Soc. London, 

 Zool., XXX, 1909, p. 130. 



Providence, 50 — 78 fath. 



44. Tuhucellaria zanzibarensis, Waters, Journ. Linn. Soc. London, Zool., xxx, 

 p. 131. 



Saya de Malha, 145 — 150 fath. ; Farquhar, reef; Cargados, 28 fath. 



45. Microporella ciliata (Pallas). 



Eschar a ciliata, Pallas. Hincks, Brit. Mar. Pol., p. 206. 

 Providence, 50 — 78 fath. ; Cargados; Saya de Malha, 125 fath. 



46. Microporella hyadesi (JuUien). 



Fenestrula hyadesi, JuUien, Mission Scientific du Cap Horn, p. 44 ; Waters, Journ. 

 Linn. Soc. London, Zool., xxix, 1909, p. 237. 



There are no foliaceous expansions of the zoarium among the specimens in this 

 collection which are all incrusting ; the zooecia are perforated throughout, the margins 

 of the orifices are smooth below, with three spines above, usually ; the avicularian 

 mandible has large wings. 



Providence, 50 — 78 fath. ; Saya de Malha, 47 fath. 



47. Microporella diadema, MacGillivray. 



Lepralia diadema, MacGillivray, Trans. Roy. Soc. Vict., ix, p. 8, 1868. 



There are, unfortunately, none of the peculiarly marked ocecia present in this colony. 



Providence, 50 — 78 fath. 



48. Microporella renipuncta,'K?icG:\\\\vYSiy, Trans. Roy. Soc. Vict., xix, p. 130, 1882. 



There is a very small colony of this form without avicularia or ooecia, but recognisable 

 from its distinctive pore. 



Providence, 50 — 78 fath. 



49. Microporella malusii (Aud.) (PL 8, fig. 8). Hincks, Brit. Mar. Pol., p. 211. 



Zooecia very large, about twice the size of the usual British species, regularly marked 

 all over by opaque, white spots, an oval or kidney-shaped pore not far below the orifice. 

 No avicularia. Ooecia smooth, resting on a broad ridge at the back. 



Saya de Malha, 125 fath. The only colony of this kind is old and worn in parts and 

 is adhering to a piece of old shell. 



50. Microporella magnirostris (MacGillivray), Trans. Roy. Soc. Vict., xix, p. 134, 

 1882. 



Amirante, 35 fath. 



51. Lagenipora tuherculata, MacGillivray, Trans. Roy. Soc. Vict., xix, p. 132, 1882. 

 Providence, 50 — 78 fath. 



