﻿362 CEETACEOUS FISHES FEOM BAHIA. [Aug. I908, 



Jurassic and typicall)' Cretaceous forms of fishes. Lepidotus Soiizai, 

 as shown by the subdivision of its snpratemporals and cheek-plates, 

 belongs to the Upper Jurassic and Wealden section of the genus 

 which it represents ; while the strong tuberculations on its scales 

 suggest that it is one of the latest representatives of its race. The 

 Coalacanth Mawsonia might be either Jurassic or Cretaceous, but 

 has hitherto been met with only in Eahia. The Clupeoid Scomhro- 

 clupea occurs most abundantly in the Upper Cretaceous (Turonian) 

 of the Lebanon, but is also found just above the jS'eocomian in Istria 

 and Dalmatia, perhaps also in the Xeocomian of Switzerland. 



EXPLANATION OF PLATES XLII & XLIII. 



Plate XLII. 



Fig. 1. Mawsonia oninor, sp. nov. ; tail and anal fin, with the two dorsal fins 

 displaced backwards, one-half of the natural size. «=anal fin; 

 c = caudal fin; r/^ rf- = anterior and posterior dorsal fins, [Brit. 

 Mus., No. P. 10567.] 



2. The same ; greater part of the right angular bone of the mandible, 



outer aspect, natural size. [Brit. Mus., No. P. 10569.] 



3. The same ; left operculum, outer aspect, natural size. [Same 



specimen.] 



Plate XLIII. 



Fig. 1. Lepidotus Souzai, sp. nov.; opercular apparatus, anterior scales, etc., 

 right side, two-thirds of the natural size. 0^. = operculum ; s.t.= 

 supratemporals. [Brit. Mus., No. P. 10601.] 



2. The same ; Tentral scales, natural size. [Brit. Mus., No. P. 10566.] 



3. Scomhrocliipea scutata, sp. nov. ; type-specimen, lacking tail, natural 



size. [Brit. Mus., No. P. 10570.] 



4. The same ; imperfect skeleton, natural size. ?'.= ventral ridge-scale, 



displaced. [Brit. Mus., No. P. 10571.] 



Discrssiox. 



The Peesidext commented on the value of the communication 

 both to geology and to palaeontology. It was fortunate when outlines 

 so complete as those exhibited by the Author could be reconstructed 

 from such fragmentary material as he had at his disposal. 



Mr. E. T. Newtox congratulated the Author on the acquisition 

 of material which enabled him so satisfactorily to confirm the Lower 

 Cretaceous (or Wealden) age of the strata in the neighbourhood of 

 Bahia and for a long distance to the south of that town. He also 

 complimented the Author on the interesting and lucid manner in 

 which he had put before the meeting the osteological details of the 

 fossil fishes, by which their near alliance with Wealden forms in 

 other parts of the world was clearly shown. 



