273 



In another species, or, perhaps, approximating genus, 

 on a grey Hmestone, the locahty of which is not known, 

 the head part differs materially from that of the preceding, 

 it being nearly covered by three large round and rough 

 protuberances, two of which possess the situation of the 

 eyes, and the third, which is the largest, is placed anterior 

 to and between these ; but each appears to have possessed 

 a similar porulous and granular structure. — Organic Remains, 

 Vol. iii. PL xvii. fig. !6. 



A third species, found by Thomas Botfield, Esq. of 

 Hopton Court, Shropshire, in an iron stone nodule, differ 

 much from either of the preceding : — The head is large, 

 semiorbicular, lunated posteriorly, and terminates at the 

 sides in an acute angle. The body, which has only five 

 transverse plates, is remarkably short ; its sides going directly 

 off from the head, and meeting speedily at an obtuse angle. 

 From this part proceeds the tail of the animal, a long central 

 spine-like process, which is of a greater length than that of 

 both the head and body." Org. Remains, Vol. iii. p. *267. 

 This fossil appears to be the same with monoculites lunatus 

 of Mr. Martin, PI. xlv. fig. 4, who supposed it to approach 

 nearer, in size and figure, to the monoculum apus, than to 

 any other known recent species of that genus. 



The remains of another species are found in the beds 

 of fuller's earth, but the caudal termination of these 

 have only been as yet described. This species appears 

 from the form of its plates to have approached the nearest 

 to that which is found in Dudley limestone ; but the dorsal 

 plates gradually diminish in size, and, at last, finishing in an 

 elongated caudal termination. 



Mr. Benjamin Henry Latrobe relates in the second 

 volume of the x\merican Philosophical Transactions, that 

 among the fish resorting to the waters of the York River, 

 the alewife or oldwife (clupea nondescripta J arrives, in very 

 considerable shoals, from March to May. In this season 



X n. 



