302 Mr. Weaver's View o/'Ehrenberg's Observations 



Families and Genera, with their characteristics. According to 

 this view the Bryozoa comprise four Orders, Polythalamia, 

 Gymnocorce^ Thallopodia and Scleropodia; the Polythalamia 

 being divided into Monosomatia (single-bodied), consisting of 

 fifty-six genera, ondPolysomatia (many-bodied or polyparian), 

 composed of twenty-two genera, forming altogether seventy- 

 eight genera of Polythalamia. The following Table exhibits 

 the general arrangement. 



Bryozoa. 

 Animalia asphycta, tube cibario simplici, sacciformi aut tubuliformi, vera 

 corporis articulatione nulla aut sensim nunjerosiore, corporis forma 

 gemmis aut novis articulis accedentibus sensim aucta, hinc indefmita, 

 nunquam sponte dividua, omnia et singula verisimiliter periodice ovi- 

 para, ideoque hermaphrodita. 



Qrdo I. — Polythalamia. 

 Libere vagantia et loricata. 



Monosoviatia. 

 Familia I. 



Familia II. 



Familia III. 



Familia IV. 



Familia V. 



Familia VI. 



Poly Somalia. 

 Familia VII. 



Familia VIII. 

 Familia IX. 



Familia X. 



MiLIOLINA. 



Genera 2. ? Miliola, ? Gromia. 



NODOSARINA. 



Gen. 11. Glandulina, Mucronina, Nodosaria, Ortho- 

 cerina, Dentalina, Lingulina, Frondicularia, 

 Rimulina, Vaginulina, Planularia, Marginu- 

 lina. 

 Textularina. 



Gen. 6, Bigenerina, ? Dimorphina, Textularia, Gram- 

 mostomum ( Vulvularid), Polymorphina, Vir- 

 gulina. 



UVELLINA. 



Gen. 11. Guttulina (et Globulina)^ Uvigerina, Bulimi- 

 na, Valvulina, Rosalina, Clavulina, Globige- 

 rina, Pyrulina, Sphgeroidina. 



ROTALINA. 



Gen. 22. Operculina, Soldania, Planorbulina, Rotalia, 

 Trochulina, PSpirulina, Calcarina, Pleuro- 

 trema, Planulina, Discorbis,Omphalophacus, 

 PGyroidina, Truncatulina, Lenticulina, No- 

 nionina, Cristellaria, Siderolina, Dendritina, 

 Robulina, Anomalina, Saracenaria, Cassidu- 

 lina. 

 Plicatilia. 

 Gen. 6. Bilocnlina, SpirolocuHna, Triloculina, Arti- 

 culina, Quinqueloculina, Adelosina. 



Asterodiscina. 



Gen. 5. Asterodiscus, Lunulites, Oibitulites, Cupu- 

 laria, Flustrella. 

 Soritina. 



Gen. 2. Sorites, Ampliisorus. 

 Frumentarina. 



Gen. 3. ? Dactylopora, POvulites, ? Poly tripe. 

 Helicosorina. 



Gen. 5. Peneroplis, Pavonina, Vertebralina, Orbicu- 

 lina, ? Heterostegina. 



