DISCOVERY REPORTS 



to detect any important differences. There would, therefore, seem to be only one 

 spotted species of Spiny Dogfish in the southern hemisphere. I am unable to say 

 whether the unspotted form from Australia and Tasmania (S. megalops) is identical 

 with that from New Zealand (S.griffitii) and that from South America (S.fernandezianus), 



as the material in the British Museum collection consists only of a few adult and 

 half-grown specimens from Tasmania, some young examples from New Zealand, and 

 a stuffed specimen of 900 mm. from Juan Fernandez. For the present, the species, 

 which may occur in the Patagonian region, may be known as S. fernandezianus 

 (Guichenot). 



SQUATINIDAE 



Squatina armata (Philippi). 



Rhina armata, Philippi, 1887, An. Univ. Chile, lxxi, p. 561, pi. vii, fig. 1. 



Folds at sides of head not produced into lobes. Outer nasal flap with entire edges; 

 inner flap with two simple prolongations, the outer of which has a broad fringed lobe 

 at its base. Distance between the spiracles about equal to the interocular width, which 

 is 4 -I times the longitudinal diameter of the eye. Outer angle of pectoral nearly a right 

 angle ; distance from anterior angle to posterior end of base about f the extreme length 

 of the fin. Pelvic not reaching the vertical from origin of first dorsal. Width of tail (at 

 the base) about j of its length. Base of first dorsal about | its height, which is a little 

 more than its distance from the second ; second dorsal a little shorter, but scarcely lower 

 than the first ; interspace between the dorsals a little less than the distance from second 

 dorsal to caudal, much less than the distance from base of tail to origin of first dorsal. 

 Posterior edge of caudal fin somewhat notched, the upper lobe nearly vertically truncate, 

 the lower rounded. Upper surface with small, pointed denticles, each with 3 keels; a 

 middorsal series of large denticles, with one or more rows of smaller enlarged denticles 

 on either side ; small groups of spines in front of and behind the eyes, and two small 

 groups on tip of snout on either side of median line of head ; a pair of spines, well 

 separated from each other, between the spiracles ; small imbricated denticles at outer 

 edges of paired fins, extending on to their lower surfaces and, on the pectoral, forming 

 an inferior marginal strip equal in width to about J the interocular space ; denticles on 

 lower surface of tail not extending forward to its base; lower surface of head and 

 abdomen naked. Greyish brown, with a few small round whitish spots. 



Hab. Argentina; Chile. 



