220 Records of thp: S.A. Museum 



is one of the two species recorded from our waters, it may be assigned to 

 P. fcrriKjincum McCnll., hitherto known only from three examples, the type taken 

 outside Port Philip Heads in November, 1909, another specimen obtained in the 

 -.Uistralian Bight in 22 fathoms in Septcmlter, 1914, and a third taken at 

 Encounter Bay, 1919, and forwarded by Mr. H. Button. xVn illustration of the 

 .young specimen taken on the Glenelg beach is supplied for comparison with that 

 ])ublished by Mr. JMcCulloch. Remembering the changes that take place with 

 growth, no useful ])urpose would be served by making the usual comparative 

 measurements, but it may be iioted that the young shark is corporally well 

 equipped for its advent of independent exi.stence. As is usual, the umbilical 

 vessels enter the body at the fore-end of the thorax, and in the specimen here 

 considered, and as above mentioned, the contents of the yolk sac have been nearly 

 ab.sorbed. The spiracle lies close below the hinder corner of the eye. 



The colour markings of the adult are indistinct ; in the young they are very 

 pronounced, and serve to show whence the adult pattern is derived. The nasal, 

 ocular, and branchial bands are simple, but those that follow have each the form 

 of a double diamond-shaped figure laid across the back ; between each figure, on 

 the dorsal line, is a large round black spot, and a fainter one beloAV it. These 

 spots, together Avith one on the lower point of each diamond and one on each fin, 

 are evidently responsible for the smaller black spots of the adult into which the}' 

 break up. 



The accompanying illustration represents the young of natural size ; the tail 

 portion has been duplicated for more accurate comparison. 



Length of specimen, 168 mm. 



