SPONGES I49 



*Siphonia, Park. [Cret], (Fig. 27); *Jerea, Lamx. [Cret] ; *Polyjerea, 

 From. [Cret.]; *Bolospongia, Hinde [Cret.]; *<4rocJa<Wa, Z. [Cret.]; 

 *Thecosiphonia ) Z. [Cret.] ; * Calymmatina, Z. [Cret.] ; *Turonia, Mich. 

 [Cret.] ; *Kalpinella, Hinde [Cret.] ; * Thamnospongia, Hinde [Cret.] ; 

 *PJwlidocladia, Hinde [Cret] ; *Ragadinia, Z. [Cret] ; *Plinthosella, Z. 

 [Cret] ; *Phymaplectia, Hinde [Cret] ; *Rhopalospongia, Hinde [Cret] ; 

 *Spongodiscus, Z. [Cret]; *Stuckenbergia, Tschern. [Garb.]. [FAMILY 

 ARCHAEOSCYPHIDAE, Rauff] ; * Archaeoscyphia, Hinde [Cambr.]. [FAMILY 

 CHIASTOCLONELLIDAE, Rauff] ; *Chiattoclonetla, Rff. [Sil.]. 



[SUB-TRIBE ONCHOCLADINAE, Rauff.]. [FAMILY AULOCOPIDAE, Rauff]; 

 *Aulocopium, Oswald [Sil.] ; *Dendroclonella, Rff. [Sil. J 



FAMILY 2. DESMANTHIDAE, Tops. With tetracrepid desmas of one 

 kind, either monocrepid or tetracrepid ; no microscleres ; the ectosomal 

 megascleres monactinal, rendering the outer surface hispid. Genera 

 Desmanthus, Tops. ; Monocrepidium, Tops. FAMILY 3. ICORALLISTIDAE, 

 Soil. [ = RHIZOMORINA, Z., pars]. The desmas monocrepid and tuber- 

 culate. Genera jCorallistes, O.S. [Eoc.] ; Macandrewia, Gray; Dae- 

 dalopelta, Soil. ; Heterophymia, Pom. ; Callipelta, Soil. FAMILY 4. 

 IPLEROMIDAE, Soil. [ = MEGAMORiNA, Z.]. The desmas monocrepid and 

 smooth. Genera Pleroma, Soil. ; jLyidium, O.S. [Eoc.] ; *Placonella, 

 Hinde [Jur.] ; *Megalithista 1 Z. [Jur.] ; *Dorydevmia, Z. [Cret] ; *Catt*r- 

 ella, Z. [Cret] ; *Holodictyon, Hinde [Cret] ; * Pachypoterion, Hinde 

 [Cret] ; *Heterostinia t Z. [Cret.] ; *Nematrinion, Hinde [Cret] ; *Iso- 

 raphinia, Z. [Cret]. 



Demus ft Rhabdosa, Soil. The ectosomal spicules are microrhabdi, 

 or modifications of them (discs). Desmas monocrepid. 



FAMILY 5. NEOPELTIDAE, O.S. Ectosomal spicules monocrepid discs. 

 Genus Neopeltis, O.S. FAMILY 6. SCLERITODERMIDAE, Soil. Ectosomal 

 spicules microrhabdi ; other microecleres sigmaspires. Genera Sclerito- 

 derma, O.S. ; Aciculites, O.S. FAMILY 7. CLADOPELTIDAE, Soil. Ectosomal 

 spicule a monocrepid desma, highly branched in a plane parallel to the 

 surface ; no microscleres. Genus Siphonidium, O.S. 



TRIBE 2. ANOPLIA, Soil. 



No ectosomal spicules or microscleres. 



FAMILY 8. f AZORICIDAE, Soil. [ = RHIZOMORINA, Z., pars.]. Desmas 

 monocrepid. Genera Azorica, Crtr. ; Tretolophus, Soil. ; Gastropkanella, 

 O.S.; Setidium, O.S. (Fig. 28, A); Poritella, O.S.; Amphibleptula, 6.S.; 

 Tremaulidium, O.S. ; Leiodermatium, O.S. ; Sympyla, Soil. ; Petromica, 

 Tops. 



[TRIBE POECILOCLADINIDAE, Rff.] 

 [SUB-TRIBE ANOMOCLADINAE, Rff.] 



FAMILY 9. IANOMOCLADIDAE, Z. Genera ^Vetulina, O.S. [Eoc.], (Fig. 

 29) ; *Cylindrophyma, Z. [Jur.] ; *Melonella, Z. [Jur.] ; *Scytalia, Z. [Jur. 

 Cret] ; *Lecanella, Z. [Jur.] ; *Mastosia, Z. [Jur.]. [FAMILY ANOMO- 

 CLONELLIDAE, Rff.]. * Anomoclonella, Rff. [Sil.] ; *Pycnopegma, Rff. [Sil.]. 



