168 CALCAEEOUS SPONGES. 



1878. Spongites cylindricus, Quenst. Petref. Bd. 5, p. 172, t. 123. f. 6, 7, 9-15. 



1878. Peronella cylindrica, Zitt. Studien, III Ab. p. 32. 



1879. Peronella cylindrica, Zitt. Neues Jahrb. p. 25, t. 2. £. 4. 



A transverse microscopic section of a specimen from Heidenstadt shows clearly 

 marked slender fibres, about 'OS mm. in thickness, composed of relatively large 

 three- or four-rayed spicules, irregularly mingled together. A spicuLir ray measured 

 •2 mm. in length and -02 mm. in thickness. In some cases the spicular rays project 

 beyond the margins of the fibre, though not to the same extent as in the specimen 

 figured by Prof. Zittel in the 'Neues Jahrbuch,' 1879, t. 2. f. 4. 



Distribution. Upper Jura: Randen; Heidenstadt, Wiirtemberg. According to 

 Prof. M'Coy this species also occurs in the Coralline Oolite at Malton, Yorkshire. 



Peronella badiciformis, Quenst. sp. 



1878. Radicispongia radiciformis, Quenst. (non Goldf.) Petref. Bd. 5, p. 178, t. 123. f. 16-26. 

 1878. Peronella radiciformis, Zitt. Studien, III Ab. p. 32. 



Distribution. Upper Jura : Randen, Switzerland. 



Peronella Michelini, Etallon, sp. 



1859. Parendea Michelini, Etallon, Lethea Brunt, p. 420. 



1840-47. Spongia lagenaria, Mich, (non Lamx.) Icon. Zooph. p. 114, t. 26. f. 4. 



Distribution. Upper Jura : Randen, Switzerland. 



Peronella nodulosa, Quenst. sp. 



1858. Spongites nodulosus, Quenst. Der Jura, p. 698, t. 84. f. 24. 



1878. Spongites nodulosus, Quenst. Petref. Bd. 5, p. 335, t. 131. f. 28-30. 



1878. Peronella nodulosa, Zitt. Studien, III Ab. p. 32. 



IHstribution. Upper Jura: Streitberg; Nattheim, Wiirtemberg. 



Peronella clavata, B.oem. sp. 



1839. Scyphia clavata, F. A. Rcem. Ver. nordd. Oolit. Nacht. p. 10, 1. 17. f. 24. 

 1864. Siphonoccelia clavata, F. A. Rcem. Pal. Bd. 13, p. 29, t. 1. f. 2. 

 1878. Peronella clavata, Zitt. Studien, III Ab. p. 32. 



Distribution. Lower Neocomian. Hils-Conglomerate : Berklingen, Brunswick. 



Peronella truncata, From. sp. 

 1861. Sipfiunocoelia truncata, From. Cat. raisonne, p. 7, t. 1. f. 3, 3 a. 

 Distribution. Lower Neocomian : Censeau, near Salins. Jura : Berklingen, Bruns- 

 wick. 



