8 MR. E. T. NEWTON ON EEMAINS OF [Feb. 1 899, 



known, (1) by the form of the maxilla, which has two processes on 

 the upper margin, and a deep curvature indicating a broad snout ; 

 and (2) by the coarse sculpturing of the outer surface of many of 

 the bones. 



Amia Colenutti, sp. nov. (PI. I, fig. 22.) 



Another specimen to be described is a maxilla found by Mr. Cole- 

 nutt in Bed 5 at King's Quay, during a visit to the locality with the 

 present writer in 1896. This maxilla, which is now in the Museum 

 of Practical Geology, was perfect when found, but broke in pieces 

 and lost many of its teeth in drying ; it is 110 mm. in length : that 

 is, nearly as long as Mr. Clement Eeid's specimen from Hamstead ; 

 but it is much more slender, and the upper border is nearly straight, 

 being interrupted only by a single slight prominence which marks 

 the anterior limit of the supplementary maxilla. The rugosity of 

 the outer surface extends from the front tooth for about 43 mm. 

 along the den tary margin, and reaches the upper margin of the 

 bone only at about the middle of this extent. The other parts of 

 the outer surface are nearly smooth. When viewed from below, the 

 dentary margin is seen to form a comparatively slight curve, and 

 the proximal articular process passes inward at a much smaller 

 angle than in the Hamstead specimen ; in these respects it more 

 nearly resembles the maxilla of Amia calva. 



The teeth are round and inflated at the base ; they curve inward 

 to end in sharp points ; and they form a single row of from 40 to 50 

 teeth, gradually diminishing in size from before backward. 



This maxilla being unaccompanied by any other parts of the 

 skeleton, its generic position is uncertain ; yet its close resemblance 

 to the maxilla of Amia calva in its more important features makes 

 it highly probable that it is closely related to that genus. The 

 restriction of the ornamentation to the fore part of this bone, while 

 in A. calva such ornamentation is more strongly marked and con- 

 fined to the hinder moiety, is sufiicient to show that our fossil does 

 not belong to the recent species. 



This maxilla differs from that of A. anglica in being more slender 

 and less deeply curved, as well as in having only a single slight 

 process on the upper margin and more restricted ornamentation. 



Compared with the American fossil forms it is the maxilla of 

 PapinchiJiys plicatus,^ figured by Cope, which most nearly resembles 

 this British fossil, but the latter differs, not only in being narrower 

 anteriorly, but also in having the rugosity altogether in front of the 

 supplementary maxilla. 



The maxilla of Amia Kehreri is not known. 



As this King's Quay maxilla cannot be referred to any recorded 

 species, it will be convenient for it to have a name, and it is pro- 

 posed to dedicate it to the gentleman who has done such excellent 

 work among the Oligocene beds of the Isle of Wight, and to name 

 it Amia Colenutti. 



1 Cope, Kcp U.S. Geol. Surv. Terr. vol. iii (1884) 4to, pi. iii, fig. 12. 



