AMPHION. 83 



A. pauper, n. sp. PI. VI, fig. 32. 



Omnino precedenti simillimus, nisi margine antico angustiore, lobis glabella longiori- 

 bus radiatis, postico sinuato, mediano valde obliquo recto, antico obsoleto. Glabella lente 

 convexiuscula, laferibus paullum arcuatis. Oculi subremoti. 



One specimen only has been preserved of this neat species, which is truly distinct. It 

 is about the same size as the preceding, from which, at a glance, you may distinguish it by 

 the long glabella-furrows, and when closely examined it is found that there is one pair 

 absent, viz., the obsolete anterior ones. A faint marking only indicates their proper 

 position. 



Glabella, including the narrow front border, as long as broad, regularly and gently 

 convex, arched slightly in front ; the sides not straight, but curved outwards ; the upper 

 angles rectangular. Anterior border uarrow, not thickened. Anterior furrows quite 

 obsolete. Median furrows starting from the upper angle or a little below it, straight, 

 oblique, and reaching far towards the centre. Lower furrows situated opposite the eye, 

 and reaching nearly as far as the upper ones. The middle lobes are thus subcuneate, the 

 basal lobes broad-linear. The neck-furrow is distinct, but shallow ; the neck-segment linear, 

 but not so wide as the basal lobes j none of the glabella-furrows are thickened at their ter- 

 minations. Axal furrows not deep. Position of eye doubtful, but probably further 

 forward than in A. benevolens. The neck-furrow on the cheek is strong. 



Compared with the preceding species, A. pauper differs in nearly every part. Instead 

 of a thick front margin, it has a narrow one ; the anterior furrows are obsolete, a very curious 

 character, and peculiar to this species. The median ones oblique and longer than the 

 basal furrows, which are sinuous instead of straight. Lastly, the head is less convex, and 

 all the furrows — neck-furrow, axal-furrow, and glabella-furrows — less strong. The outline 

 of the glabella is barrel-shaped, not rectilinear. 



Locality. — One specimen only is known, from the Caradoc Rocks of Tramore, where 

 it occurs with the preceding (Mus. Irish Industry, B. 643). 



The genera Staurocep /talus and Deiphon should follow these. If we obtain good mate- 

 rials during the coming summer, they shall be illustrated next. If not, it will be 

 better to proceed with the Calymenida. 



The genera Cybele, Encrinurus, and their allies, will be in like manner postponed. 

 And the Acidaspidat and Lichadce may well wait awhile till the more complete materials 

 belonging to the Calymenida*, Cypliaspidee, Olenidce, and Asaphidce, are exhausted. I 

 think, as the families are numbered, it cannot be of great consequence which is illustrated 

 first. But if the materials be forthcoming, it is desirable not to interrupt the natural 

 order of the genera ; and I shall do so as little as possible. 



