BEITISH FOSSILS. 



Other British Species, 



Only one other certain species of the genus has yet occurred in England, and that so 

 like the C. (Proetus) elegantulus from Gottland, that if it were not for some differences in 

 proportion, long head spines, &c., it would have been thought the young of that species. 

 Its characters may be thus given ; — 



C. pygmceus, sp. nov. \_Proetus elegantulus, Angelin (1852), Palseontol. Suec, t. 17. 

 fig. 7. Loven (1845), Ofvers. Kongl. Vetensk. Akad., t. 1. fig. A. junior ?] 



C minutus, ovatus ; capite granuloso fronte paullum producto ; glabella depressa gems 

 angustiori, lohis basalibus rotundatis; oculis parvis ; limbo antico angusto tumido, angulis 

 posticis longispinosis ; thorace segmentis 12, axi angusto, pleuris acuminatis — posticis re- 

 curvatis, fulcro antice ultra dimidium posito ; cauda minutd, lateribus costatis. 



Not two lines long, (whUe C. elegantulus grows to an inch and a half,) depressed, 

 the head rather more than one third the entire length ; glabella round oval, the 

 small basal lobes full twice their diameter from each other. A narrow and tumid 

 space lies between the glabella and the somewhat produced and narrow front 

 border. The cheeks are considerably wider than the glabella, and bear the small 

 eyes at a short distance from the latter ; their angles are produced into long diver- 

 gent spines, which reach as far as to the 7 th or 8 th thorax segment. The pleurae 

 are wider than the axis, and have in front the fulcrum very remote, behind it is 

 not quite one third away from the axis. The tail is very small, the axis and sides 

 are ribbed, but it is too imperfect to be described properly. 

 The characters above mentioned may be those of a young specimen ; but it has the 

 full number of rings, and in this genus they increase in number with age ; the head 

 is not nearly so produced in front, nor the glabella so convex as in C. elegantulus, 

 and the head spines are proportionally much longer ; above all, the Gottland species 

 has blunt pleurae, and in ours they are decidedly acuminate, the hinder ones being 

 even recurved at the tips ; the pleurae are grooved nearly to the ends. 

 Locality, — Eastnor Castle, Malvern Hills ; in Wenlock shale. 



J. W. Saltee. 



August ^ 1853. 



