256 Annals of the South African Museum. 



number of short irregular longitudinal ridges. In the posterior part 

 of the bone the ridges are mostly vertical. A similar ornamentation 

 is present on the maxilla, preopercular, and opercular, and to a less 

 extent on most of the other surface bones. The froritals, parietals, 

 and supratemporals are, however, nearly smooth. 



Appendicular Skeleton. The shoulder girdle is not unlike that of 

 Palceoniscus, though the proportions of the different elements differ 

 considerably. The post-temporal is a small bone which lies behind 

 the second supratemporal. It is only very slightly ornamented. The 

 supraclavicle is a large oblong bone which is divided into two very 

 unequal parts by the lateral line which crosses it obliquely, separating 

 the upper and posterior corner from the lower part. The anterior 

 and inferior large part is beautifully ornamented by a series of 5 or 6 

 wavy ridges running down it, while the small upper part is unorna- 

 raented. The lateral line has in its course through the bone 7 or 8 

 foramina. Both the clavicle and the interclavicle seem stouter than 

 in Palceoniscus, but otherwise they are similar in structure so far as 

 can be seen. Both are beautifully ornamented by ridges of ganoine. 

 The postclavicle is considerably longer than in Palceoniscus and is 

 smooth. The infraclavicle is well developed and ornamented. 



The pectoral fin is not fully preserved in any of the specimens. It 

 consists of at least 10 rays -probably considerably more of which 

 the second is the longest. All are unarticulated, and they appear to 

 be unbranched even at their tips, but the specimens are not sufficiently 

 well preserved to admit of certainty on this latter point. In the front 

 of the fin are powerful fulcra, w r hich occupy a space rather larger than 

 that occupied by the first three rays. 



The pelvic fin is about half the size of the pectoral and is formed 

 of about 12 rays, which are articulated at their bases but appa- 

 rently not distally. There is no evidence of branching in either 

 of the two specimens showing the fin. Small fulcra lie on the 

 front of the fin and occupy a space a little greater than that 

 occupied by one ray. 



Unpaired Fins. -The dorsal fin is situated far back, and nearly 

 opposite the anal. It consists of 21 rays, of which the 7th and 8th 

 are the longest. All the rays are articulated, but though distally 

 they are much flattened, they are not manifestly branched. A 

 number of small fulcra are present on the front of the upper part of 

 the fin. A couple of enlarged scales are present on the dorsum in 

 front of the fin. 



The anal fin is slightly longer than the dorsal. It consists of 

 34 rays, of which the 8th is longest. All the rays are articulated 



