58 FOSSIL CIRRIPEDIA. 



transverse section across the middle of the valve is given in fig. 7, d, exhibiting its peculiar 

 outline. 



Carina. In Mr. Pitch's collection there are two carinsc which probably belonged to 

 this species, at least they do not belong to the only two other species of Pollicipes, (viz. 

 P.fallax and striatus,) found by this gentleman in the chalk near Norwich. These caringe 

 are identical, as I know from examination, with that (also from Norwich) figured by 

 Mr. Sowerby, (Min. Conch., PI. 606, fig. 7,) as the anterior valve of his Pollicipes 

 mlcatus, Scalpellum maximum, var. sulcatum of this work. These two carinse differ a 

 little from each other in the basal margin, being either rectangularly pointed or rather 

 blunter and more arched; their surfaces are smooth, but in one specimen there are 

 some obscure longitudinal strias ; in outline they are tapering, triangular, almost straight, 

 transversely flatly arched, subcarinated, edge inflected, with the lines of growth bowed 

 doT^mwards, and consequently with the basal lateral angles or heels a little prominent. 

 Finally, these carinse cannot be strictly distinguished from the same valve in P. glaber 

 and unguis, but as I believe neither of these species occur in the upper chalk near Norwich, 

 they can hardly belong to them. 



Affinities. The scuta in this species differ from all others in the projection of the basal 

 margin, close to the rostral angle ; a somewhat similar projection, I may remark, sometimes 

 occurs in the scuta of the recent Lep as fascicular is, A. vitrea of Lamarck. Internally, the 

 valve more resembles that of the second and third varieties of Scalpellum maximum than 

 any other species. The terga can be distinguished from those of P. glaber only by 

 the depression along the occludent margin being deeper, wider, and square-sided. 



9. Pollicipes reflexus. Tab. Ill, fig. 8. 



Pollicipes reflexus. J. Sowerby. Min. Conch., pi. 600, fig. 8. 



P. scutis tenuibus, subovalibus ; margine basali cum margine occludente unguium rectc 

 longc major em form ante ; costd obsoletd rotundatd ab apice ad angulum baso-lateralem decur- 

 rente, valvam in duas fere aquales partes sejjarante. Carind lineari, transverse abrupte 

 arcuatd ; margine basali multum producto, apice truncato. Lateribus superioribus sub- 

 pentagonis. 



Scuta ; thin, suboval, with the basal margin forming an angle much larger than a rect- 

 angle with the occludent margin ; a faint rounded ridge runs from the apex to the baso- 

 lateral angle, dividing the valve into two nearly equal halves. Carina linear, in a trans- 

 verse line steeply arched ; basal margin much produced, with its apex truncated. Upper 

 Latera subpcntagonal. 



Upper Marine Eocene formation ; Colville Bay, Isle of Wight. Mus. J. Sowerby, F. Edwards. 

 I owe to the kindness of Mr. Sowerby an examination of some of the original speci- 



