154 PERCY SLADEN TRUST EXPEDITION 



There is the usual raised avicularium below the orifice and often a small rounded one 

 on the other side of the rostrum ; there are small, round raised avicularia scattered round 

 the orifice and over the ooecium and there are many, spatulate and very large, lying 

 across the zooecia in various ways. The colonies are loosely attached, large, brown 

 expansions. On the dorsal aspect there is, usually, a single pore on the upper margin 

 of the zooecium, but sometimes there are two or three of these which are probably the 

 bases of radicle fibres. 



Cargados, 20 — 30 fath. ; Amirante, 30 fath. 



98. Adeonella subsulcata (Smitt). 



Porina subsulcata, Smitt, Floridan Bryozoa, p. 28. 



Cargados, 30 fath. ; Seychelles, 39 fath. ; Amirante, 20 — 80 fath. 



99. Cellepora megasoma, MacGillivray, Prod. Zool. Vict. Dec. xv, p. 188. 



This species is fairly abundant in incrusting and foliaceous forms. There is a good 

 deal of variation in the development of the peristome but the main features of orifice, 

 avicularia and ooecia remain constant. 



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



100. Cellepora longirostris, MacGillivray. Phillips, Willey's Zoological Results, 

 p. 448. 



These specimens have avicularia not mentioned by Miss Phillips, there is usually 

 one lying across the inner aspect of the rostrum with sharply curved -beak, there are 

 several raised and directed outwards, scattered over the front wall and sometimes 

 others large and spatulate between the zooecia. Ooecia have faintly radiating lines and 

 an arched ridge above, as in Miss Phillips' species and the colonies are incrusting like 

 hers, not erect like MacGillivray's*. This species may be identical with Mucronella 

 tubulosa, Hincksf. 



Saya de Malha, 125 fath.; Cargados, 30 fath. 



101. Cellepora costata, MacGillivray, Prod. Zool. Vict. Dec. xv, p. 183. 



There are little ball-like colonies growing on Hydroids and also some small, freely 

 branched colonies of this species. They have most of the features of C costata as 

 described by MacGillivray, but others that are more like C. rota. The surface is not 

 fluted but smooth or pitted, the sculptui'ed area on the ooecia is sometimes nearly circular 

 and the peristome has a thin rim, the avicularia making a ridge up either side of this 

 almost like in Lagenijyora spinulosa. 



Saya de Malha, 125 — 145 fath.; Providence, 50 fath.; Amirante, 35 fath.; Seychelles, 

 34 fath. ; Cargados, 29—30 fath. 



102. Cellepora vagans, Busk, Report Challenger Exp., x, pt. xxx, p. 198. (PI. 8, 

 fig. 17.) 



There are two colonies of what I believe to be this species although they have 

 * Trans. Roy. Soc. Victoria, xxi, p. 113, Nov. 1884. + Ann. Mag. Nat. Hist, ser. 5, vi, 1880, p. 383. 



