ON FOSSIL POLYZOA. 249 



Third Report of the Committee, consisting of Dr. H. C. Sorby, 

 and ]\Ir. G-. E. Vine, appointed for the purpose of reporting 

 on Fossil Polyzoa (Jurassic Species — British Area only). 

 Drawn up by Mr. Vine {Secretary). 



A PARTIAL examination of the Jurassic Polyzoa was made by Goldfuss,' 

 but I am not aware whether he had any English examples of the types 

 described and figured by him. With the exception of the Aulopora all 

 the types are foreign, and I do not find any reference to British species 

 in his text. In the ' Geological Manual ' of De la Beche, published in 

 1832, a list of species is given, but only two are named as found within 

 the British area — Cellipora orhiculata, Goldfuss (= Berenicea, Lamouroux), 

 and Millepora straminea, Phill. In the ' Geology of York,' ed. 1835, 

 Phillips gave three species only — M. straminea, Gellaria SmitJdi,'^ Scar- 

 borough, and an undescribed Betepora (?). When, in 1843, Professor 

 Morris published his ' Catalogue of British Fossils,' there was a large in- 

 crease of species, but many of these had not been thoroughly worked. 

 In 1854, Jules Haime examined critically the whole of the Jurassic 

 Polyzoa then known, and many English naturalists furnished him with 

 material from their own cabinets so as to enable him to correlate British 

 and foreign types. Lamouroux, Defranc, Milne-Edwards, Michelin, 

 Blainville, and D'Orbigny have published descriptions of Jurassic species,. 

 and a list of these, so far as I am able, will be given at the end of this 

 report. Professor D. Braun, by the publication of his paper on species 

 found in the neighbourhood of Metz, added materially to our knowledge 

 of French Jurassic types, and later foreign authors, Damortier, Waagen 

 and others, have increased the number of described species. Since the 

 publication of Haime's work much valuable material has been accumu- 

 lating in the cabinets of collectors, and I would willingly draw up a. 

 monograph if desired to do so. In the meantime I offer, in the following 

 report, a rather compact analysis of genera and species known by name 

 or otherwise to the palEeontologist. 



Classification. — Haime's arrangements of the Jurassic Polyzoa is very 

 simple ; all his species, excepting two, are placed in one family, the Tubu- 

 liporidce. In the ' Crag Polyzoa,' 1859, Mr. Busk gave a synopsis of 

 the ' Cyclostomata,' arranged in eight family groups, which Avere made 

 to include several Mesozoic types. This arrangement, with a slight 

 alteration, was followed by Smitt, Busk to some extent accepting the 

 modification for the arrangement of recent Cyclostomata in his later 

 work ('Brit. Mus. Cat.' pt. iii. 1875). The Rpv. Thomas Hincks 

 (' Brit. Marine Polyzoa,' 1880) disallows the family arrangement of Busk 

 in so far as it relates to British species. The Tubidiforidce, Hincks, in- 

 clude, in part, three of the families of Bask. In this report I shall 

 follow Hincks as far as I am able to do so, as many of the Jurassic 

 species may be included in the family Tuhidiporidce as now described. 

 It will, however, in the present state of our knowledge at least, be im- 



' Petrifacta Germania, 1826-1833. - Hijipothoa (?), Morris's Catalogue. 



