152 



Tegella n. g. 

 Callopora Norman p. p. 

 (PI. IX., figs. 5-6). 

 The zooecia, which have spines and a slightly developed cryptocyst, are pro- 

 vided with multiporous rosette plates. Hyperstomial ooecia with an incompletely 

 calcified ectoocecium, which are again surrounded by auicularia. 



Of species known to me Callopora unicornis and C. Sophiae belong to this genus. 



Foveolaria Busk, char, emend. 



The entire surface of the zooecium is formed by a very thick, solid, much 

 furrowed ci-yptocyst, which is deeply depressed in the whole periphery of the 

 aperture. A very large, oval, compound operculum with a joint connecting the val- 

 vular part and the accessory part. Multiporous rosette-plates. Hyperstomial ooecia 

 which are provided with a membranous ectoocecium and are finally hidden by 

 covering calcareous layers. In most zooecia a large avicularium proximally to the 

 opening. 



To this genus I can only refer F. elliptica Busk. 



Caleschara Mac Gillivray^ char, emend. 

 Rosseliana JuUien. 



There is no gymnocyst, but on the frontal wall of the zooecium a strongly 

 developed, depressed ciyptocyst, which is sometimes (C. denticulata) only perforated 

 by a semi-circular opesia and two slit-like opesiulse. No spines. No avicularia. 

 Endozooecial, but more or less distinctly prominent ooecia. All rosette-plates uni- 

 porous. 



This genus agrees with the majority of the Flustridae both in its possession 

 of endozooecial ooecia and uniporous rosette-plates. Of species described only C. 

 denticulata M. Gill, and C. Rosseli Aud. belong to it. An undescribed species from 

 Siam makes an intermediate form between the two just mentioned species, its 

 cryptocyst terminating in a free, dentate lamina, and if we imagine this lamina 

 coalesced distally with the dentate lateral parts of the cryptocyst, we should have 

 two slits similar to those found in the former species. — 



' 74, Vol. 2, Dec. V., p. 45, PI. 48, fig. 8, 



