ON THE FOSSIL PHTLLOPODA OF THE PALAEOZOIC ROCKS. 



173- 



Sixth Report of the Committee, consisting of Mr. R. Etheridue, 

 Dr. H. Woodward, and Professor T. Eupert Jones {Secretary), 

 on the Fossil Phyllopoda of the Palceozoic Rocks. 



§ I. Monograph of the PalEeozoic Cera- 



tioaarUhe. 

 § II. Ceratiocaris tyranmis from Trout- 

 beck. 

 § III. Scandinavian Phyllocarida, and 



teeth of Ceratiucaru. 

 § IV. M. Novak's Aristozoe solitaria, 



Ceratiocaris, spp., and note on 



Cryptocaris. 

 § V. M. Novak's note on Ptyclwcaris (?) 



Jaschei, F. A. Koemer. 

 § VI. Mr. Clarke's Devonian Pkyllocarida 



of New- York State. 



§ VII. Bactropui in Devonshire. 

 § VIII. Tremadoc Fossils. 



1. Saceocaris major, Salter. 



2. Linyiikwaris Saltenana 



nov. 



3. Lingulocarig siliquiformu 



J." &: W. 



4 . Ceratidcans ( 1 ) 



5. Hymeruicaris vermicaudar 



Salter. 

 § IX. Estheria from Orkney. 

 § X. Devonian Phjilocarids of New- 

 York State, &c. 



§ I. Monograph. — -' A Monograph of the British Palaeozoic Phyllopoda 

 (Phyllocarida, Packard), Part I., Ceratiocaridce,' based on our former 

 Reports to the British Association for the Advancement of Science, waF 

 published in January of this year by the Palseontographical Society. 

 The genera and species treated of are those enumerated in the table at 

 page 234 of the Report for 1886, excepting that Ceratiocaris attenuaia wan 

 found to be Salter's G. tyrannus; to this species also may be referred 

 pi. 2, fig. 4, pi. 4, fig. 3, pi. 5, fig. G, and pi. 6, fig. 11 of the Monograph, 

 the style or telson being strong and straight (not curved as in its near 

 ally, G. Miirchisoni). The Portuguese fossil Phyllocarid, first named and 

 described by D. Sharpe asDithyj-ocaris(?) longicauda (?) is also included, 

 with illustrations (being within reach at the Geological Society of London), 

 as a doubtful Ceratiocaris. 



§ II. Ceratiocaris tyrannus. — Professor Sven Leonhard Tornquist, of 

 Lund, has sent to us for examination some fragments of the caudal ap- 

 pendage of a Ceratiocaris from the Upper Coldwell Beds, near Troutbeck,. 

 Westmoreland. The specimen consists of a style and two stylets, im- 

 perfect at the ends, in a sandy mudstone. One stylet lies close to the 

 style, and the other is indicated by a cast at an angle with its fellow. 

 They are all straight and the style shows a lateral row of pits (bases of 

 spinules). It is too straight for C. 3Iiorchisoni, and the pits are too small 

 for C. gigas. It may belong to C. tyrannus, like the specimen (also from 

 Westmoreland), referred to C. valida, perhaps wrongly, ' Monogr. Foss. 

 Phyll. ' p. 21, pi. 6, f. 11. The specimen shown by pi. 4, fig. 3, is also 

 probably C. tyrannus and not C. Murchisoni. 



§ III. Ceratiocaridce from Sweden. — The Scandinavian Phyllocarida 

 mentioned in the last ' Report ' (Manchester meeting, 1887), pp. 60-62, 

 have been fully described and figured in the ' Geological Magazine ' for 

 March 1888, pp. 97-100, pi. 5, and for April, pp. 145-150, pi. 6 and 

 woodcuts. Ceratiocaris valida has been added with some probability as 

 occurring in Sweden. In G. Angelini the style (telson) was probably 

 only 7 (not 15) mm. longer than in pi. 5, fig. 1, p. 97; and the row of 

 little pits (bases of prickles) is on the right-hand (not left-hand) side of 

 the cast as figured, ibid., see also ibid., p. 150. 



