in the Cuhn-shales of Devonshire. 543 



specimen of Ph. cequalis (without cheek-spines to the glabella); 

 and a new species, named by him Ph. longicornis (taf. iii. figs. 9, 

 10), with cheek-spines as long as the head-shield. In both species 

 the glabella is long and narrow, and, in Fh. (equalis, it is slightly 

 pointed in front and much wider at the base. He refers a broadly- 

 rounded pygidium with a wide blunt axis to Ph. Eichwaldi, Fischer, 

 =iPh. Brongniarti, de Kon. (referred by us to Griffithides obsoletus, 

 Phillips). Another well-marked pj'gidium, with a dagger-shajDed 

 extremity to the axis, is figured, taf. iii. fig. 11, but not named. He 

 carefully analyses the figures and descriptions of Culm Trilobites 

 given by previous writers, and eliminates from the true Ph. cequalis 

 Burraeister's Archcegonus reqiialis, Sandberger's Ph. latispinosa as quite 

 different species ; Emmrich's figure is considered to be a restoration, 

 and Sandberger has joined the head of one species to the body and tail 

 of another ! The head of Sandberger's specimen probably belongs 

 to Ph. cequalis. 



Locality. — Waddon-Barton, near Chudleigh, Devon. From the 

 collection of Mr. J. E. Lee, F.S.A., F.G.S. 



Phillipsia minor, H. Woodw., 1884. Plate XVI. Fig. 9. 



Phillipsia minor, H. Woodw., Pal. Soc. Men. Carb. Trilob. part ii. 1884, p. 69, 



plate X. figs. 5, 6a, b, 7, and 8a. 



This is the smallest Carboniferous Trilobite which I have studied, 

 being only half the size of the smallest specimen of P. Colei, from 

 Donegal, Ireland. 



Head-shield rounded in front, one-third broader than long ; the 

 glabella occupies one-third of its breadth, and is oval in outline, 

 slightly broader in front, tumid, with distinctly-mai'ked basal lobes ; 

 lateral furrow indistinct ; surface of glabella and free-cheeks covered 

 with minute puncta ; neck-lobe rather deep and prominent, free- 

 cheeks having a furrow around the margin parallel to the border ; 

 angle of cheek produced into a short slightly-curved spine. 



Thorax consisting probably of nine segments ; axis very distinct, 

 forming one-third the entire bi'eadth of body ; axal furrows well 

 defined, each pleura strongly grooved down the centre ; extremities 

 rounded. The eye is considerably larger in this than in the pi'e- 

 ceding species, but can only be distinctly seen in one specimen. 



Pygidium one-fifth broader than long; the axis forms one-third 

 of the breadth at the proximal border, but diminishes rapidly to a 

 somewhat acute point at rather less than one-fourth of its entire 

 length from the posterior margin. There are fourteen segments in 

 the axis, and ten lateral pleurae,, which bifurcate as they approach the 

 margin of the shield. 



Hypostome. There seems but little reason to doubt that a 

 detached free-cheek and a hypostome, lying upon the same slab 

 with the above described nearly entire specimen of P. minor, really 

 belong to one and the same specimen. 



The hypostome is as broad as it is long, the anterior margin once 

 attached to the underside of the front of the head-shield is rounded 

 in contour, and expands laterally into two small lobes ; posteriorly 

 the hypostome is elongated into a pentangular lobe, with a slightly 



