41(5 (J. M. Ma/dedone: 



H li<rhtei--coloured centre, evidently beint^ the epitheca covering 

 pores in the calcified wall of the zooecia. 



Schizoporella nitida, n. sp. (Pi. XXVII., Ki<,^ 14). 



ZoariiHu encrusting'. Zooecia oval. ventricose ; surface 

 smooth, with slightly elevated ridges radiating towards the 

 centre. Thyrostonie with raised margin, arched above, straight 

 below, with a deep, narrow sinus in the lower lip ; a very small 

 avicularium close to the margin on one side. A few large 

 vicarious avicularia, with spatulate mandibles scattered about 

 the zoarium. 



A neat, small-celled form. The vicarious avicularia are 

 characteristic of this species. 



Schizoporeila granulata, n. sp. (PI. XXVll.. Fig. 15). 



Zoariuui encrusting. Zooecia ii'regularly cjuadrate or oval ; 

 surface granulated or pitted; a raised line between the zooeci;;. 

 Thyrostonie with raised nuirgins, orbicular, with a deep sinus 

 in the lower lip. A suudl subtriangular avicularium below the 

 thyrostonie near the middle of the zooecia, pointing either 

 vertically or transversely. 



This is near S. triangular, Hincks and S. pachnoides, iMc(J., 

 but I think distinct : the avicularium is very much smaller, and 

 is sometimes placed transversely. 



Schizopopella porifera, n. sp. (1^1. XXVIJ., Fig. 16). 



Zoarium encrusting. Zooecia ovoid, ventricose; surface 

 covered with minute circular pores. Tliyrostonie subtriangular, 

 with raised margins, arched al)()vc. with a deep sinus in jthe 

 ])roxiiiial margin. An acute avicularium on one side close to 

 the margin of the thyrostonie in most of the zooecia, varying, 

 however, in size, and also in direction. 



Schizoporeila perarmata, n. sp. (PI. .\X\'II., I"ig. 17). 



Zoarium encrust iug. Zooecia elongate, (juadrate ; surface 

 much depressed, pei'forati'd with small I'ound pores: margins 



