CERATIOCARIS ANGUSTA. 47 



Oxford Mus. T (PI. XI, fig. 11) is a little trifid set, near G. robusta, and has a 

 style 28 mm. long, and two stylets each 15 mm. ; but these appendages are much 

 broader proportionally than those of G. robusta ; and hence we regard this as a new 

 species, C. patula. The stylets are smooth with slight marginal rims ; and the 

 style is faintly fluted and pitted (having been spinose) definitely along two rows, 

 one near each margin. It is in Upper- Silurian shale, probably from near Ludlow : 

 as is also Oxford Mus. M, which is much like G. patula, but is not figured. 



15. Ceratiocaris angusta, T. B. J. and H. W., 1886. PI. X, fig. 9. 



1885. Cekatiocabis, sp. nov. ?, T. B. J. $ R. W. Third Eeport Pal. Phyll, p. 350 ; 



Geol. Mag., 1885, p. 465. 



1886. — angusta, Fourth Eeport, p. 231 ; Geol. 



Mag., 1886, p. 458. 



In the British Museum one of those marked 58878 from Linburn, near 

 Muirkirk, shows a style (21 mm.), tapering, with circular section at base, and 

 apparently smooth, together with a corresponding attached stylet, 16 mm. long. 

 This set differs from the appendages of either G. papilio or C. stygia, as well as 

 from G. patula and G. minuta. 



J 6. Ceratiocaris minuta, T. R. J. and H. W., 1886. PI. X, fig. 11 ;P1. XI, fig. 10 (?). 



1885. Cekatiocabis, sp. nov. ?, T. R. J. Sf H. W. Third Eeport Pal. Phyll., p. 350 ; 



Geol. Mag., 1885, p. 464. 



1886. minuta, — Fourth Eeport, p. 231 ; Geol. 



Mag., 1886, p. 458. 



In Owens College Museum, Manchester, is a very delicate little set of caudal 

 appendages (PI. X, fig. 11). The style (central) shows a circular section at its base 

 (top), about 2 mm. wide, is 12 mm. long, and tapers gently to a sharp point. The 

 lateral stylets are 8 mm. each. All are subcylindrical, and delicately ridged and 

 fluted. From the Lower-Ludlow or Aymestry Limestone, on the old road at 

 Mocktree ; collected by the late Mr. Lightbody. 



Mus. Pract. Geol. d ff (' Catal. C. S. Foss.,' 1878, p. 118), from the Lower 



