132 DEVONIAN FAUNA. 
the only one that seems to have any force is the sharpness of the lateral angles. 
In other respects it exactly corresponds to some of my largest specimens, though 
somewhat surpassing them in size. The divarication of the ribs seems rather 
more regular in the German shell, but it occurs in one of Davidson’s figures, and 
in some of my larger shells. The marginal truncation is a marked feature of 
the species. 
9. RHYNCHONELLA ANGULARIS, Phillips, sp. 
1841. TrREBRaTULA anautartis, Phillips. Pal. Foss., p. 89, pl. xxxv, fig. 162. 
1848. = PRIMIPILARIS, F. A. Romer. Verst. Harzgeb., p. 18, pl. v, 
figs. 10 a—e. 
1865. RuyNCHONELLA ancuLARIS, Davidson. Brit. Foss. Brach., vol. iii, pt. 6, 
p. 68, pl. xiv, figs. 11—13. 
1885. — — Maurer. Abhandl. Grossh. Hessisch. Geol. 
Landes., vol. i, pt. 2, p. 198, pl. 
vili, figs. 21—22 6. 
Localities—From Lummaton I have five specimens ; another is in the Torquay 
Museum, and four in the Woodwardian Museum. From Barton there are three 
in the British Museum, of which two have been figured by Davidson. From 
Wolborough there are five poor specimens in Mr. Vicary’s Collection, and one of 
Phillips’s figured specimens in the Museum of Practical Geology. 
Remarks.—This form is rare, but sufficient specimens exist to show that it is 
not a mere accident. My examples agree precisely with the three figured 
by Davidson, except that in one of them there is rather more thickening and 
flattening of the margins, and that they are not quite so transverse. 
In general characters the shell very closely approximates Kh. implexa; the 
chief points of difference being its angularity, its still fewer and coarser ribs, the 
existence of a slight fold (which is rather exaggerated in Davidson’s figure), and 
the large size of the beak. Whether these differences indicate that it is more 
than a variety is a question that must remain undecided until a larger number of 
specimens can be examined. 
10. RaYNcHONELLA? ANIsoponta, Phillips, sp. Pl. XV, figs. 1, la, 1), 2. 
1841. TrREBRATULA ANISoDONTA, Phillips. Pal. Foss., p. 86, pl. xxxiv, fig. 154. 
??1854. RayncHoNnELLA HEXATOMA, Schnur. Paleontographica, vol. iii, p. 176, pl. 
xxill, figs. 2a—q. 
