144 PERCY SLADEN TRUST EXPEDITION 



31. Micro'pora brevissima, Waters, ExpM. Antarct. Beige, 1904, Bryozoa, p. 40. 

 Providence, 50 — 78 fatli. ; Saya de Malha, 125 fath. ; Salomon, 75 fath. 



32. Micropora bouchardii (Aud.) (PL 8, fig. 4). 



Flustra bouchardii, Aud., Descrip. de I'Egypte, Hist. Nat. i, PI. 9, fig. 11. 



This striking species, of which there is only one very small colony, growing on a 

 coral, resembles Savigny's figure, PI. 9, fig. 11, described by Audouin as Flustra 

 bouchardii. The zoarium is incrusting, covered by a thin yellowish membrane. Zooecia 

 large, prominent, perforated over the entire front wall. Orifice arched above, the lower 

 margin slightly convex, surrounded by six thick spines, black at their bases. A pore on 

 either side of a central keel below the orifice. No ocecia. 



Providence, 50 — 78 fath. 



33. Membraniporella magnijica, n. sp. (PI. 8, fig. 5). 



Zoarium incrusting in large, yellow patches. Zooecia fairly close together, large, with 

 from five to six prominent ribs on either side, which fork before uniting in the centre, 

 forming a double irregular row of holes there, an erect spine-like process on each rib near 

 its outer edge. Orifice large, spreading towards the base, a spine on either side and 

 several flat, forked spines above. Ocecia flat, peaked above, or sometimes with three peaks, 

 the middle one the highest, they appear to be membranous ; the flattened spines lying 

 behind, and showing above them. 



Cargados, 30 fath. 



There is a large dried colony of this beautiful species, measuring about two inches 

 across, unfortunately much broken. It has some resemblance to (?) Membraniporella 

 aragoi (Aud.). 



34. Cribrilina radiata (Moll). Busk, Report Challenger Exp., pt. xxx, p. 131. 

 Providence, 125 fath. ; Saya de Malha, 29 fath. ; Salomon, 75 fath. 



35. Cribrilina radiata, var. Jlabellifera, Kirkpatrick, Ann. Mag. Nat. Hist., ser. 6, 

 i, 1888, p. 75. 



The avicularia here have much wider wings than are figured by Kirkpatrick. 



Providence, 50 — 78 fath. 



36. Cribrilina figidaris (Johnston). Hincks, Brit. Mar. Pol., p. 196. 



There is one colony of this species without avicularia, growing on a piece of coral. 

 Salomon, 60—120 fath. 



37. Cribrilina reticulata, n. sp. (PI. 8, fig. 6). 



Zoarium composed of zooecia widely separated by a reticulate, calcareous expansion, 

 giving off" erect processes here and there, which bear avicularia on their summits. Zooecia 

 small and neat with from 9 — 11 finely perforated furrows on either side of a central line, 



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