STILL FOUND 1N A LIVING STATE. 355 
of the class Bryozoa. Of the 10 new genera only one (Dino- 
physis), and of the 40 species only 2, belong to the family Peri- 
dinza; all the other Polygastrica belong to the family of the 
_Bacillariz, the rapidly increasing extent of which becomes daily 
more surprising and important. Both the Bryozoa belong to 
the order Polythalamia. 
A. Ten new Genera*. 
I. AmpuitetrraAs.—Char. gen. Animal polygastricum e Bacillariorum 
familia ejusque Naviculaceorum sectione, liberum, lorica simplici - 
‘bivalvi aut multivalvi (silicea),- cubica, imperfecta spontanea divi- 
sione in catenas non hiantes rectasque abiens, aperturis in utraque 
laterali opposita facie quaternis, ad angulos sitis. 
Cum Denticella Biddulphia et proxime ad Fragilariam accedit, a 
_ Staurastro, cui forma similis, longius recedit. 
The genus was first found in the chalk marls, and has since been 
____ observed alive in the Cattegat. 
Tl. Ceraroneis.—Char. gen. Animal polygastricum e Bacillariorum 
familia, ad Naviculacea accedens, liberum, spontanea perfecta divi- 
sione geminatum aut solitarium, nunquam cateniforme, lorica sim- 
plici prismatica bivalvi silicea, aperturis loricaze duabus oppositis me- 
diis, margine solido rimam longitudinalem utrinque interrumpenti- 
bus. 
: Forma Navicule, apicibus in cornua longe attenuata productis. 
Both known species of this genus have only been observed living 
| in salt water, and are figured on Plate VIII. 
Il. Dinopuysis.—Char. gen. Animal polygastricum e Peridinzorum 
familia, liberum, loricee (membranacez) sulco transverso ciliato et 
erista media plicata insigne, ocellis carens. 
Forma Vaginicole libere, natura Peridinii. 
It was remarkable that both species were found together with 
phosphorescent animals in sea water, and are probably themselves 
phosphorescent, which is likewise indicated by their yellow colour. 
_ The genus is not known fossil. Both species are represented on 
Plate VIII. 
IV. Evcamrra.—Char. gen. Animal polygastricum e familia Bacil- 
lariorum, ejusque Desmidiaceorum sectione, liberum, lorica simplici 
univalvi, complanata, cuneata, in utroque medio latere excisa, divi- 
sione spontanea imperfecta in tznias planas articulatas lacunosas 
eurvas, paullatim circulares, abiens. , 
[* We have not given the detailed descriptions of the genera and species, but 
merely the diagnoses, as they would have occupied too much of our space, and 
too specially zoological for this work.—Eb. ] 
