42 CARBONIFEROUS TRILOBITES. 



Formation,. — In white crystalline Carboniferous Limestone. 

 Localities. — Falls Brew, Caldbeck, Cumberland (Mus. Brit). Fig. 6 a, Longnor, 

 Derbyshire, and fig. 6 b, from Narrowdale. (Mus. Pract. Geol.) 



Note on Griffithides longispinus, Portlock, PI. IX, fig. 3. (See ante, p. 36.) 



The specimen figured on PI. IX, fig. 3, represents a detached glabella of this 

 species, with a hypostome lying close to its posterior border. The glabella is also 

 of interest because it exhibits (as a cast in relief), on the side of the decorticated 

 head, the cast of the preocular pore (p), so well seen in Griffithides globiceps and 

 Ph. Eichwaldi (PL IV, fig. 6, 8, 10, and 15). 



Hypostome. — The anterior border of the hypostome measures 7 mm. in width, 

 and it is also 7 mm. long. The posterior border is narrow and pointed. The 

 middle of the hypostome is very strongly curved ; the surface, where preserved, 

 shows it to have been ornamented with delicate branching and wavy raised lines 

 or strios. Two muscular impressions or indentations mark the hypostome near 

 the narrow extremity. The margin of the hypostome appears to have been 

 thickened. 



Formation. — Carboniferous Limestone. 



Locality. — Longnor, Derbyshire. 



Original specimen in the Museum of Practical Geology, Jermyn Street. 



%* The following three species, referred to the genus Phillipsia, have been 

 recognised since pp. 11 — 27 were in print, and require description. 



20. Phillipsia laticaudata, H. Woodw., sp. nov. PI. VII, fig. 4. 



Head imperfect ; glabella tumid, rounded in front, with a narrow, smooth, 

 raised marginal rim ; general surface smooth, but finely punctated under a lens ; 

 basal lobe separated by a deep semicircular furrow from the rest of the glabella, 

 find with two short lateral furrows on each side. Neck-furrow deep; neck-lobe 

 rounded with one prominent tubercle on the centre. Length of glabella 5 mm., 

 breadth 3£ mm., cheeks not preserved. 



