DINELOPS. 121 



The foremost vertebral centra (fig. 1, v) are remarkably short and deep, and 

 exhibit round pits for the insertion both of the neural arch and of the ribs. In 

 the middle of the abdominal region the vertebral centra are longer (B. M. 

 no. P. 1046G). 



The scales (PI. XXIV, fig. 3 a) bear the usual minute granulation on their 

 covered portion ; but the coarser tubercles on their exposed portion tend rather 

 towards fusion into reticulating rugae than towards arrangement in radiating lines. 

 Only the anterior scales are known, and the few radiating grooves on their covered 

 portion have not yet been observed. 



The finely rugose base of a very stout pectoral fin-ray is seen in B. M. 

 no. P. 10466; and a fragment of the dorsal fin in the same fossil shows that this fin 

 occupies its usual position. 



Horizon and Localities. — Zone of Schloenbachia v avians : Folkestone, Kent. 

 Zone of Holastev subglobosus : Wouldham and Burham, Kent. 



Genus DINELOPS, novum. 



Genevic Characters. — As Osmeroides, but gape of mouth much wider and 

 maxilla long and straight, perhaps with only one supramaxilla ; a single series of 

 slender conical teeth on the margin of each jaw, partly flanked by an outer series 

 of comparatively small teeth ; and scales not marked in their covered portion with 

 radiating grooves. 



Type Species. — Dinelops ornatus, from the English Chalk. 



Remarks. — This genus is in many respects similar to Notelops, 1 from the Upper 

 Cretaceous of Brazil, but differs in lacking a separate bony plate above the 

 operculum. It also closely resembles Pvotelops," from the Turonian of Bohemia, 

 but differs in the arrangement of the marginal teeth and in the relatively larger 

 size of its scales. 



1. Dinelops ornatus, sp. nov. Plate XXIV, figs. 4—6. 



Type. — Imperfect fish, lacking caudal region ; British Museum. 



Specific Ghavacters. — The type species, attaining a length of not less than 

 80 cm. Length of head with opercular apparatus much exceeding maximum depth 

 of trunk. Lateral portions of cranial roof and operculum ornamented with coarse, 



1 A. S. Woodward, 'Catal. Foss. Fishes B. M.,' pt. iv (1901), p. 27. 



2 Gr. C. Laube, " Ein Beitrag zur Kenntuiss der Fisclie des bohmischen Turons," Denkschr. k. Akad. 

 Wiss., math.-naturw. CI., vol. 1 (1885), p. 286, pi. i. 



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