230 REPORT— 1886. 



instance, Oxford Mus. F; M.P.G. Xi; Ludlow Mus. T.) One of these 

 (X ^) has been labelled C. gigas by Mr. Salter ; and therefore we adopt 

 that name. 



4. The specimens from the Wenlock beds of Dudley and Kirkby 

 Lonsdale, described and figured in the ' Geol. Mag.', 1866, p. 204, pi. 10, 

 figs. 8 and 9, as belonging to C. MurcMsoni ('Third Rep.' p. 12), are 

 too thick and. strong for that, species, and the Dudley example (fig. 8) 

 has difierent proportions. We propose to distinguish them as C. valida. 



5. Some abdominal segments (Oxford Mus. E ; Ludlow Mus. L ;. 

 B.M. 39403; M.P.G. §f and |f ; 'Third Rep.' p. 20, &c.), narrow in 

 proportion to those in one other specimen marked f |, and referred to- 

 C. MurcMsoni, and very much narrower and smaller than in C gigas, we 

 separate as a new species, to be called C. attemiata. They have straight 

 styles and stylets, much shorter than in either of the foregoing. 



6. Two small specimens of crushed telsons (one in Mr. Cooking's 

 collection, and the other M.P.G. X ^L, both from the Ludlow series), 

 probably smaller than C. MurcMsoni, have a fluted or channelled sculp- 

 ture on their upper part, instead of either wrinkles or leaf-pattern ; hence- 

 they may be regarded as belonging to a distinct form, for which the 

 name canaliculata will be convenient. 



7. One fine large carapace (M.P.G. Xi) and others smaller and less 

 definite in some respects (M.P.G. X4-; X^; X^; Ludlow Mus. A; 

 Oxford Mus. K & J), and associated with segments and appendages, we- 

 regard as distinctive of a new species, though hitherto referred to 

 C. leptodactylus (' Third Rep.' pp. 12, 15). The test appears to have 

 been of an unusually solid consistency. 



These carapaces in some instances have been much modified by 

 pressure, but we trace a close similarity throughout the series, allowing 

 for probable differences of age. The shape approximates to that of 

 Dr. James Hall's species G. acuminata and F. Schmidt's G. Noetlingi 

 ('Third Rep.' p. 30). There are marked differences, however, and we 

 intend to designate this form G. Halliana, in honour of our old friend^ 

 ■who began working at these Phyllocarida as early as 1852. 



A perfect specimen of G. acuminata, Hall, has been lately described 

 and figured by Dr. Julius Pohlman in the ' Bulletin of the Buffalo 

 Society of Natural Sciences,' vol. v. No. 1, 1886, pp. 28, 29, pi. 3, fig. 2. 

 Its caudal appendages are much like those of G. papilio and G. siygia, the 

 style being relatively short, and the stylets broad and blade-like. The 

 appendages in M.P.G. X^^, X ^, and Ludlow Mus. A are different from 

 these, being thinner, tapering slowly, and pitted in at least one row, as 

 exposed. 



8. G. Pardoeana, La Touche. Two carapaces with segments and 

 parts of appendages from Ludlow (Ludlow Mus. B and D ; ' Third 

 Rep.' p. 12) diff'er from any other form. One of them (B), with a 

 wrong caudal appendage attached to it, in the Ludlow Museum, has been 

 labelled ' G. Pardoensis,' and as such is referred to in J. D. La Tonche's- 

 ' Guidebook to the Geology of Shropshire.' We retain tliis name 

 (altering the termination, as it refers to a person, and not a place) for the 

 two carapaces here referred to. One of them (B) is of special interest 

 as having its rostrum still in place. 



9. The fine large specimen of G. ludensis, H. W. (' Third Report,' 

 p. 16), has been again carefully studied, and we find reason to believe 

 that the caudal appendage which appears longest in the fossil was not 



