ADDITIONS TO THE FISH FAUNA OF LORD HOWE ISLAND — "WAITE. 39 



each side. The basal half of the fin is likewise black, its upper 

 portion marked with dark longitudinal lines. The other fins are 

 without markings, but the upper caudal rays are black, and a few 

 rays below these have towards their free margin black spots ; the 

 lower lobe of the caudal is also, but much more narrowly edged 

 with black. 



Length of specimen, 275 mm. 



This species is known from Mauritius and Zanzibar in the 

 Indian Ocean ; Apamana (Gilbert Islands), Tahiti (Society Islands), 

 and now Lord Howe Island, in the Pacific. 



Not having the original description of U. brandesii, I can only 

 contrast our fish with Bleeker's figure, which, as above suggested, 

 probably represents that species. The most important points of 

 difference appear to be as follows : — -In U. pleurostigma the snout 

 is much longer, due to the backward position of the eye, which 

 lies wholly in the posterior half of the head; in U. brandesii the 

 eye is but little out of centre. The barbels in Bennett's species 

 do not reach beyond the angle of the preopercle; in Bleeker's they 

 extend far beyond it. In colouration both species agree in having 

 a black blotch on the lateral line, followed by a light one, but the 

 former is very much larger in U. pleurostigma. This latter species 

 has also the black mark at the base of the second dorsal fin, and 

 the basal half of the fin itself black, also black marks on the 

 caudal, none of which occur in U. brandesii. 



NoMEUS GRONOVii, Gmeliu. 



Included in Mr. Farnell's collection is an example of this widely 

 distributed pelagic form. In 1894, I first recorded it from the 

 coast of New South Wales;" since this time I have had several 

 examples from Maroubra Bay, and have myself seen it there. It 

 is not infrequently left in the rock-pools after the tide has 

 receded. It swims very leisurely, and seems to be incapable of 

 making the sudden darts so common with most fishes; when 

 moving gently in the water, the dark-coloured ventral tins are 

 extended, and the long tail with its slender peduncle, wriggled 

 from side to side. This action, in conjunction with the narrow 

 elongate body, so greatly resembles the movements of a Lizard in 

 water that on first seeing the fish, my colleague, Mr. T. Whitelegge, 

 thought it was a Skink that had fallen into the rock-pool. He 

 tells me that, on a second occasion, he was similarly deceived. 



It is noticed that Noiri'ius is only found on our coast when the 

 Portuguese Men-of-war are driven ashore, and this is quite in 

 accord with the known habit of the tisli in swimming beneath tiie 

 Physalia. These latter are slow moving organisms, dependent on 

 wind and wave for conveyance, hence any associate would need 

 but the slightest power of locomotion in order to keep the pace 



« Waite— Proc. Linu. Soc. N.S.W., (2), ix., 1894, p. 219. 



