148 Annals of the Carnegie Museum. 



"Body comparatively deep, but fusiform, three or more series of 

 the flank-scales vertically elongated; a dorsal and ventral series of 

 prominent ridge-scales. Teeth large, styliform, in close series. Paired 

 fins moderately developed; dorsal and anal fins remote, the former 

 partly opposed to the latter; caudal fin robust, scarcely forked. Small 

 fulcra present on all the fins." 



Pristisomus latus Woodward. (Plate XXXII, fig. 2). 



1890. Pristisomus latus A. S. Woodward, Mem. Geol. Surv. New South Wales 

 Paleont. No. 4, p. 35, pi. V, figs. 2, 4. 



The specimen, of which an illustration is given, is referred to this 

 species, being distinguished from the type by its greater depth of 

 trunk, the small size of the head, and relatively greater length of the 

 dorsal fin. The latter is also somewhat longer than the anal, whereas 

 in the type-species these two are described as being almost of equal 

 size, with a short base-line, and much elevated. In the specimen before 

 us the dorsal is seen to be composed of fifteen articular rays, and the 

 anal of thirteen, the outermost in each being preceded b}' a number of 

 short fulcra. 



The head is short, triangular, and has the orbit placed far forwards. 

 A pre-operculum, if at all present, must have been exceedingly narrow, 

 and the operculum and suboperculum together form a long curved 

 band, gradually widening inferiorly, and the boundaries between the 

 two elements not directly visible. In this specimen, as in most of 

 those described by Dr. Woodward, the actual substance of the bones 

 and ganoid scales has been removed by chemical solution, little re- 

 maining except mineral-stained impressions. 



