I92I.] 



A. Robertson : Report on Bryozoa. 



55 



54. Schizoporella pcrtusa, Esper. 

 Lepralia pertttsa. Hincks, 1880, p. 305, pi. xliii, figs. 4, 5. 

 Obtained at Santapilly, and dredged o£E Ganjam coast at 

 24-30 fathoms. 



55. Schizoporella dutertrci, Audouin. 



Masfigophora dutertrei, Hincks, 1880, p. 279, pi. xxxvil, fig. 2. 

 Dredged off Gopalpore at 25 to 28 fathoms growing on Ostrea 

 imhricata. Obtained also at "Investigator" station 384 (off 

 C. Negrais, Burma, 16V N., 93°37' E.). 



S 



O 



Fig g. — Schizoporella dutertrei, \ar. foliacea, nov. 



A. Two zocecia showing detail, X 40. 



B. Operculum much magnified, X 90. 



C. Distal portion of older zocecium showing an avicularlam {ai 



on umbo below orifice, X 40. 



56. Schizoporella dutertrei vai. foliacea, nov 



Zoariwn loo'^ely attached to coral conglomerate. Zocecia 

 flat, surface finelj^ porous. Orifice surrounded by a thickened 

 calcareous border from which six or eight spines extend (fig. 

 9, A). Upper margin of orifice arched, lower margin with a deep 

 narrow sinus which widens suddenly at the lowest part. Oper- 

 culum, assuming the shape of the orifice, resembles a flat rounded 

 plate with a handle (fig. 9, B). The zooecial wall projecting on 

 each side of the narrow neck or handle in two conspicuous cal- 

 careous lobes (fig. 9A, &.), the thickened border of the orifice uniting 

 below into a flat triangular platform (/>/.). In older zocecia an 

 umbo forms below the orifice («/«.) hiding the stem-like portion of 

 the operculum. Occasionally this umbo supports an avicularium 

 (fig. 9 C, av.) with mandible directed horizontally. On each 

 side of the orifice a sessile avicnlirium with mandible directed 



