162 CALCAREOUS SPONGES. 



1878. Eudea clavata, Zitt. Studien, IIIAb. p. 27. 



1879. Eudea clavata, Zitt. Neues Jahrb. p. 22. 



In a vertical transparent section of a specimen from Ranville, the fibres, seen 

 under the microscope, are clearly defined from the matrix, but the spicular structure is 

 nearly entirely obliterated ; in one instance, however, a three-rayed spicule, of medium 

 size, could be distinctly seen. The fibre is about -12 mm. in thickness. 



Distribution. Middle Jura: Couche a Polypiers — Ranville, Ben ouville ; Calvados. 



Eudea perforata, Qiienst. sp. 



1858. Spongites perforatus, Quenst. Der Jura, p. 698, t. 84. f. 26, 27. 

 1878. Eudea perforata, Zitt. Studien, III Ab. p. 27. 



1878. Orispongia perforata, Quenst. Petref. Bd. 5, p. 195, t. 124. £. 22-28. 



1879. Eudea perforata, Zitt. Neues Jalirb. p. 22. 



The fibre of this species, as seen in a transparent section, is about '25 mm. in 

 thickness ; fragments of relatively large three- or four-rayed spicules can be distin- 

 guished in it, but for the most part the minute structure is destroyed. On the 

 summit of some specimens there are traces of a dermal layer of three- or four-rayed 

 spicules. 



Distribution. Upper Jura : Randen ; Nattheim, Wiirtemberg. 



Eudea globata, Quenst. sp. 



1878. Orispongia globata, Quenst. Petref. Bd. 5, p. 195, 1. 124. f. 29-34. 

 1826-33. Manon peziza, Goldf. pars, Petref. 1 TIi. t. 34. f. 8 a. 

 1878. Eudea globata, Zitt. Studien, III Ab. p. 27. 



Distribution. Upper Jura : Nattheim, "Wiirtemberg. 



Eudea pisa, Quenst. sp. 



1878. Orispongia pisum, Quenst. Petref. Bd. 5, p. 196, 1. 124. f. 35, 36. 

 1878. Eudea pisa, Zitt. Studien, III Ab. p. 27. 



Distribution, Upper Jura : Randen. 



Eudea hiesuta, Quenst. sp. 

 1878. Tubispongia hirsuta, Quenst. Petref. Bd. 5, p. 190, t. 124. f. 16-19. 

 Distribution. Upper Jura : Randen. 



Genus COLOSPONGIA, Laube, 1864. 



COLOSPONGIA DUBIA, Munst. sp. 



1841. Manon dubium, Miinst. Beitr. zur Petref. iv. p. 28. 1. 1. f. 11. 



1845. Manon pertusum, Klipst. Bcitr. z. g. Kennt. d. ijst. Alpen, p. 282, t. 19. f . 4 a, b. 



