358 0. M. Mapledone : 



The inner fenestrae are very slightly raised pyrifonn areas, not 

 always well defined, and might be easily overlooked, but the scuti- 

 form area is always present, though the boundaries of individual 

 fenestrae are often indiscernible. In the fossil JJ. ro/npta they are 

 conspicuous, as the ectocyst is not preserved, and tliey show as 

 perforations. This epecies is the only living representative of the 

 genus. 



Schizopopella baccata, n. sp. (PI. XXVI FT., Figs. 2, 2a). 



Zooecia undefined; surface granulose; with numerous subconical 

 umbonate processes upon them; most of those near the margin of 

 the zoarium and in the vicinity of the ooecia are furnished with 

 avicularia which have straight ligulate mandibles, incurved at the 

 distal end. Thyrostome large, arched above with a very broad 

 curved sinus in the proximal margin. Ooecia globose, surface 

 granulose, with a prominent conical umbo on the summit. 



Locality. — Po rtl and . 



This is a very distinct species. The zoarium is orange coloured. 

 The umbonate processes on the zooecia in the central portion of 

 the zoarium bears no avicularia. The portion figured shows two 

 perfect ooecia; on another portion of the margin of the zoarium 

 are numerous ooecia in an incompleted state. Fig. 2a is an out- 

 line sketch of one. 



Schizopopella complanata, n. sp. (PI. XXVIIL, Fig. 3). 



Zoarium encrusting, zooecia oval, slightly ventricose. Thyros- 

 tome arched above with large rounded sinus in the proximal mar- 

 gin. xVvicularian cells very large, Ooecia (?). 



Localiti/.—Voitland. 



This species is characterised by the very large, almost flat, avicu- 

 larian cells which cover the whole surface of the zooecia; at the 

 distal end of them there is a ventricose process, with a variously 

 denticulated margin, and within which is an acute mandible open- 

 ing upwards. These large avicularian cells completely conceal the 

 thyrostome in almost every case, and in the specimen figured it is 

 seen in only one zooecium, in which the avicularium is absent. 



Mucronella ovifera, n. sp. (PI. XXV J II., Fig. +). 



Zoarium encrusting, zooecia undefined. Thyrostome auborbicu- 

 lar, with a broad ligula in the proximal margin. Avicularian cells 

 ovoid, enormous, concealing almost the wliole surface of the zooecia 

 and bearing broad semi-elliptical avivularia. 



Localtti/. — Portland. 



