General History of the Marine Poli/zoa. 251 



ating from the base to a point below the sinus, which is 

 sometimes occupied by an umbonate projection, the dividing 

 lines prettily beaded ; orifice arched above, lower margin 

 straight, with a deep narrow sinus in the centre, slightly 

 enlarged below and not contracted at the opening ; peristome 

 elevated round the top and sides of the orifice ; many avicu- 

 laria (of various sizes), elongate, subspatulate, scattered 

 amongst the cells, mandible flattish. Ooecium large, of con- 

 siderable breadth (broader than high), rounded above, ex- 

 tended in front so as to enclose the orifice, bearing a cribrillated 

 area, surrounded by a raised border, elongate or semicircular ; 

 the surface immediately around the perforated area smooth 

 and lineated longitudinally, the rest roughened. 



Zoarium white and glassy ; surface rendered uneven by the 

 prominent zocecia. 



Loc. Cook's Straits, New Zealand, investing the stems of a 

 Sertularella (Miss Jelly). 



In this species the surface is roughened by the prominent 

 cells of the superficial layer, which stand out like little hillocks 

 upon it. Amongst these are numerous deep shaft-like 

 openings, at the bottom of which the orifices of the subjacent 

 cells are visible. The surface of the zooecia is glistening, 

 granulose, traversed (commonly) by radiating and beaded 

 ridges, which mark the course of the areolre. There is 

 no regularity of arrangement ; the cells are strewn about 

 without definite plan, scarcely two are placed alike. The 

 orifice, with its very characteristic sinus, is walled in, except 

 in front, by the elevated peristome, which frequently rises 

 into mucronate projections at the sides. The enclosed and 

 perforated area on the front of the ovicell is a curious feature. 

 The opening is traversed by a central rod, giving off short 

 branches at intervals, which pass to the sides and thus form a 

 number of small orifices, through which the water must have 

 free access to the interior of the ooecium (PI. VIII. fig. 5). 

 Jullien describes* a somewhat similar structure in his Schizo- 

 porella Fischeri • but in this case the ooecial opening seems to 

 be closed by a simple plate pierced with minute holes. 



Schizoporella scintiUans, n. sp. (PI. IX. fig. 7.) 



Zocecia quincuncial, highly calcified, ovate, moderately 

 convex (sutures shallow, the boundaries obliterated in the 

 older portions of the colony), front wall depressed below, 

 rising gradually towards the oral region; surface porcella- 



* " Dragages du Travailleur : Bryozoaires," Bull, de la Soc. Zool. do 

 France, t. vii. (1882). 



