368 Miscellaneous, 



nous and hermaphrodite glands have networks of oval and round 

 meshes. The eye and the ganglia of Helix present numerous vas- 

 cular rings united by anastomoses. 



Although the researches of M.Wedl have been confined to a small 

 number of species, they suffice, however, to show that the doctrines 

 taught by M. Milne-Edwards with regard to the circulation of the 

 MoUusca will not hold good of all animals of this class*. — Sitzungs- 

 her. Akad. Wiss. Wien, 1868, ii. ; Bibl. Univ. September 15, 1869, 

 Bull. Sci. pp. 76-80. 



Discovery of Neiv and Bare Fossils in the Marl-Slate of Middendge. 

 To the Editors of the Annals and Magazine of Natural History. 



Gentlemen, — "Will you allow me a line in the next Number of 

 the 'Annals' to record the discovery, by Joseph Duff, Esq., of the 

 following interesting species in the Marl-Slate of Midderidge ? viz. : — 

 two s^Qcmien?, oi Proterosaurus Speneri ; a specimen of a large reptile 

 of undetermined genus and species ; several examples of Dorypterus 

 Hoffmanni, Germar ; four groups of the palatal teeth of Janassa 

 hituminosa, Schloth., sp. ; a specimen oi Acrolepis exsGulptus,M.\m?,t.', 

 and the head and teeth, up to the present time unknown, of Acro- 

 lejns Sedgivichii, Ag., and Ccelacanthus granulattis, Ag. 



With these remarkable novelties were associated numerous remains 

 of the fishes and plants already figured and described in English 

 works, and some additional forms of plants not hitherto annoiinced 

 from the Marl-Slate of England. All these wiU from time to time 

 be described in detail in the pages of the ' Annals.' 



I remain. Gentlemen, 



Yours truly, 



ElCHARD HOWSE. 



17 Saville Row, Newcastle-upon-Tyne. 

 October 25, 1869. 



* Without disparaging the importance of the discovery made by M. 

 Wedl of the numerous capillaiy networks in the Gasteropods, we do not 

 think that the non-existence of vast blood-sinuses, or especially the ab- 

 sence of communication of the vascular system with the exterior world 

 in these animals, necessarily follows therefrom. Quite recently we have 

 ourselves examined the communication of the pericardiac sinus with the 

 exterior by means of the excretoiy organ in PhylUrho'e, and we do not 

 think that the existence of this communication can be for one instant 

 doubted. This also applies to an analogous arrangement described in the 

 Pteropoda by M. Gegenbaur and other authors, &c. &c. — E. Clapaeede. 



