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BRITISH PALAEOZOIC PHYLLOCAR1DA. 



Caudal Appendages. 



1. Ceratiocaris? Plate XVII, fig. 8. 



Of this thin, tapering, fluted style (urotome) or stylet (cercopod), there 

 remains a portion about 29 mm. long. It apparently consists of a dark-brown 

 chitinous substance, nearly of the size and proportions of the urotome in fig. 4, 

 PI. II, Part 1, 1888, of Ceratiocaris Halliana. Without more definite evidence, 

 however, it is not possible to refer it to any special genus. 



It is embedded in a hard dark-grey shale of the Riccarton Beds (Upper 

 Silurian), Shankend, Hawick. Coll. Lap worth. British Museum. No. 59620. 



A larger specimen (style and stylet), also from the Moffat series, is figured 

 and described in Part 1, p. 45, PI. XI, fig. 13, as associated with Aptychopsis, but 

 probably belonging to Ceratiocaris. 



2. Ceratiocaris? Plate XVII, fig. 12. 



This small, sharp, blade-like body, in the squeezed graptolitic shale of 

 Skelgill, Westmoreland, is longitudinally striated or minutely fluted. It has the 

 shape of a cercopod of one of the small species of Ceratiocaris shown in PI. XI of 

 Part 1 (1888) ; but those stylets are all smooth. It may be the terminal fragment 

 of a rather broad and fluted style, like that of fig. 7 in PI. XI ; but there is 

 nothing to prove a relationship to the C. papilio there figured. Coll. Marr. 

 Woodwardian Museum, Cambridge. 



3. Caryocaris? Plate XVII, figs. 9— 11. 



The schistose mudstone of the Nantlle Tramway, near the Seiont, Carnarvon- 

 shire, from which these little fossils have come, contain many specimens of 

 Caryocaris ; but no other Phyllopods have been found in it. Therefore at first 

 sight these little species would seem to be referable to the genus (see above, p. 89), 

 were it not that a Caryocaris Wrightii, retaining its caudal appendage, has been 

 found by Prof. Malaise at Huy in Belgium (woodcut, fig. 6, p. 91). In this case 

 the style and stylets are, all three, dagger-shaped, and not long, thin, tapering 

 spines like PI. XVII, figs. 8 — 10. If these last do not belong to some form of the 

 associated Caryocaris, we must wait for further evidence of their relationship. 

 They are apparently near akin to PI. XVII, fig. 7, described above. 



Figs. 8, 9, and 10 were collected by Mr. J. E. Marr, F.R.S., and are in the 

 Woodwardian Museum. 



