38 Messrs. Embleton and Attliey on the 



preceding by the absence of barbels and its large scales. Its 

 characteristics are as follows : — 



Barhus Shaiyeyi. Plate IX. 

 D. 11-12. A. 8. L. lat. 30-31. L. transv. 4/5. 



Barbels none. The osseous dorsal ray is rather strong, not 

 serrated behind, and nearly as long as the head (without snout). 

 There are two and a half longitudinal scries of scales between 

 the lateral line and the root of the ventral fin. Snout rather 

 short and obtuse. The height of the body is rather more than 

 one fourth of the total length (without caudal), the length of 

 the head two ninths. Origin of the dorsal fin opposite to 

 that of the ventrals. Caudal fin deeply forked. Pharyngeal 

 teeth 5 I 3 I 2, stout, with rather obtuse crowns. Coloration 

 uniform. 



To judge from the number of specimens sent, this species 

 appears to be common. The largest specimen is 13 inches 

 long. Vernacular name " Aradah." 



IX. — On the Shall and some other Bones of Loxomma All- 

 manni. By D. Embleton, M.D., and Thomas Atthey. 

 With four Plates by William Dinning. 



[Plates IV.-VII.] 



In the 'Annals,' 1870, v. p. 374, appeared a paper by our 

 late lamented friend Mr. Albany Hancock and Mr. Atthey, 

 " On the Occurrence of Loxomma AUmanni in the Northum- 

 berland Coal-field." In the same periodical, 1871, vii. p. 73, 

 and in the ' Nat, Hist. Trans, of Northumb. & Durh.' vol. iv. 

 pp. 201 (1871) and 390 (1872), they noticed and partially 

 described another skull of Loxomma which had been met 

 with in the same part of that coal-field by Mr. Atthey. 



This specimen, being the most complete that has yet been 

 found here or perhaps elsewhere, and wanting but little to 

 make it perfect, demands a detailed description. 



The skull has suffered strong compression almost directly 

 downward, with an inclination from right to left. 



The upper surface and right border are perfect ; but the 

 border of the left maxilla is deficient. The two halves of a 

 lower jaw, right and left, and of the same size, were found 

 near the skull, to whicli, as they fitted it, they most probably 

 belonged. In addition to the skull and mandible, there were 



