26 Dr. Richardson's Contributions to 



been brought from the Cape of Good Hope by Delalande. 

 Others, taken in Shark Bay by Lesson, and at New Zealand 

 and Amboyna by Quoy and Gaimard, had from sixty-eight to 

 seventy-three shields, and their external resemblance to the 

 common species of the British Channel was very close, the 

 bend of the lateral line being the same, and not, as in the 

 Cape variety, more gradual. But some variations in the 

 viscera of the New Zealand examples are detailed in the work 

 above quoted (p. 26). 



Mr. Jenyns, in the "Zoology" of the ' Voyage of the Beagle' 

 (p. 68. pi. 14.), has described and figured, under the name of 

 Caranx declivis, a scad from King George's Sound which has 

 eighty-one or eighty-two shields, and the bend commencing 

 under the fifth ray of the second dorsal and terminating under 

 the ninth, or almost exactly at the middle of the line. It has 

 the black spot at the opercular notch more or less distinctly 

 seen in all the Trachuri, and indeed in most of the horse- 

 mackerels (Caranx). 



Solander, in his i Pisces Australia?,' gives the following 

 account of a Caranx. It is not accompanied by a figure, but 

 from the way in which he describes the lateral line, it is pro- 

 bably a Trachurus. 



"Scomber clupeoides. Habitat in oceano australi prope Motuaro. 

 Piscis 8-unciarum lanceolatus, supra medium e viridi- et caeruleo-opa- 

 linus, infra ex opalino-argenteus. Macula sublunaris nigra paulo 

 supra angulum laminae posticae operculorum. Iris argentea. Pu- 

 pilla nigra. Linea lateralis late loricata, postice et in cauda acute 

 alteque carinata, in medio pisce descendens. Linea dorsalis ad ini- 

 tium pinnae dorsi posterioris paulo divaricata. Area postica caudae 

 lanceolata. Pinna analis in lacuna, e regione ani continuata, recon- 

 denda. Supra pinnam analem linea obsolete impressa ; forte haec et 

 linea dorsalis scombri propriae." 



The Australian seas nourish examples of other groups of 

 Caranx. Of those which have only small scales on the fore- 

 part of their lateral line, no pinnules, little height, and an 

 almost straight form of body, Cuvier remarks that the distinct- 

 ive marks of most of the species are so obscure that they 

 escape naturalists who have not an opportunity of comparing 

 one with another, and that the synonymy is consequently in- 

 volved. The Scomber lutescens of Solander ( c Pisces Austr.' 

 p. 38) is evidently one of this group, and is perhaps different 

 from most of the other members of it, in the greater curvature 

 of the lateral line, though without a figure, this is not quite 

 certain. 



f Corpus lanceolatum, supra medium e lutescenti-opalinum, sub- 

 tus ex argenteo-opalinum. Oculi mediocres : iris argentea : pupilla 



