152 



Tegella n. g. 



Callopora Norman p. p. 



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



The zocpcia, which have spines and a slightly developed cryplocyst, are pro- 

 vided with multiporous rosette plates. Hyperstoniial mvcia with an infoinplelely 

 calcified ectoooecium, which are again surrounded by m'inihiriit. 



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



Foveolaria Busk, char, emend. 



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

 furrowed cryplocyst, 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. Hyperstoniial o(xria 

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

 covering calcareous layers. In most zocccia a large ai'icuhn'iiim proximally to the 

 opening. 



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



Caleschara Mac Gillivray', char, emend. 

 Rosseliana Jullien. 



There is no gymnocyst, but on the frontal wall of the zo(vcium a strongly 

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

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

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

 porous. 



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

 of endozoa-cial oa^cia and uniporous rosette-plates. Of species described only C. 

 denticulata M. Gill, and C. Rosseli And. belong to it. An undescribed s])ecies 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, ni<. 8. 



