PALJSOZOIC. 



EHIZOPODA. 



CAMBEIAN AND SILURIAN. 



CAMBEIAN. LOWBB SII. TJPPEB SILTTEIAN. 



SPECIES. 



Kingdom, AWIMALIA. 

 Sub-Kingdom, PEOTOZOA. 

 Class, RSIZOPOBA. 

 Order, Spongida. 



Stbomatopoeid^. 



Clathrodictyon ... Nicholson S{ 

 Murie, 1878 



— vesiciilosum N. & M. 



HEXACTINELHDiE. 

 Diotyophyton Hall, 1863 



— Danbyi M'Goy 



Girvanella Nicholson (^ 



IEiIier0ge, 1878 



— problematica ... Nich. S( 'Ether. 



SPONOIDA. 

 Hyalonema Q-ray, 1835 ... 



— Girvanense Nich. S( Ether. 



POLIAEID^. 



Hyalostelia Zittel, 1878 ... 



Pyritonema ... M'Coy, 1850... 



— fasciculus M'Coy 



Spongida. 

 Isotadites Mm-chison, 1839 



— Grindrodl Salt 



— Kcenigii Murch 



— Lindstrsemi. 



— tessellatus Salt. MS 



STAUEODEBMIDiE. 

 Pleotoderma Hinde, 1883 ... 



scitulum Hinde 



SpouaiDA. 



Protospongia Salter, 1864 



— fenestrata Salter 



Pyritonema M'Coy, 1850... 



— antiqua iJ. Ether 



— fasciculus M'Coy 



390 



REFERENCES. 



Jour. Linn. Soc. vol. xiv, p. 220, t. .i, f. 11-13; ib. Nich. 

 & Ether. Mono. Sil. Foss, Girvan, p, 238, t. 19, f. 2. 



Tetragonis, Brit. Pal. Fobs. p. 62, t. i D, f. 7, 8. Dictyo- 

 phyton, Hinde, Cat. Poss. Sponges, Brit. Mus. Nat. Hist, 

 p. 131. 



Mono. Sil. Foss. Girvan District, p. 23. 



Mono. Sil. Foss. Girvan District, p. 23, t. 9, f. 24. 



Proc. Zool. Soc. vol. iii, p. 63. 



Mono. Sil. Foss. Girvan, p. 239, t. 19, f. i. 



Pyritonema, Brit. Pal. Foss. p. 10, t. I B, f. 13. Hyalo- 

 stelia, Hinde, Cat. Foss. Sponges, Brit. Mus. Nat. Hist, 

 p. 151. 



Vide I. Lindstrsemi. 



Sil. Syst. p. 697, t. 26, f. II. Vide G. L Hinde, Q. J.Geol. 

 Soc. vol. xl, p. S36. 



Q. J. Geol. Soc. vol. xl, p. 839, t. 36, f. 2 ; cf. Ischadites 



Orindrodi ? Salt. MS. 



Siluria, 4 ed. 1867, p. 509. Vide Hinde, loc. cit. p. 839. 

 Cat. Foss. Sponges, Brit. Mus. Nat. Hist. p. 132, t. 31, f.i. 



Vide SoUas, Q. J. Geol. Soc. vol. xxxvi, p. 363 ; woodcut, 

 f. 1, p. 365, f . 2 ; ib. Hinde, Cat. Foss. Sponges, Brit. Mus. 

 p. 129, t. 28, f. 2. 



Reference doubtful. 

 Vide Hyalostelia. 



