NOTES ON TELEOSTEAN OVA AND LARVAE. 11 



fins, and also differs from the other larvae in having the black pigment 

 of the body predominantly ventral instead of dorsal. A still further 

 distinct variation is shown in an older stage with the yolk almost 

 absorbed and the mouth open (but only 2-06 mm. long), which has 

 much yellow and no black in the embryonic fin {(jp. cit., Fig. 40). 



With the material at his disposal and the small assistance derived 

 from KaClaelc's incomplete observations, Holt was unable to come to 

 any definite interpretation of these unusual and irregular variations of 

 larval pigment ; and the still further difference displayed by my larvae 

 does not add light to the problem. Holt referred them, or at least 

 some of them, to S. hepatus as the most probable parent, on account of 

 their smaller size as compared with Raffaele's, and because of the 

 greater abundance of this species in the area from which his eggs were 

 taken. He also admits the possibility of some aS'. cahrilla eggs being 

 present among his specimens. 



As to the specific identity of my eggs I have little doubt in ascribing 

 them to S. cah'iUa, which is a constant, though not common, inhabitant 

 of Channel waters. As far as can be judged from Ifaffaele's in- 

 complete records, the egg and larva agree with his >S'. cahrilla from 

 the Cay of Naples, except that his figures show no pigment in the 

 embryonic iin of the newly hatched larva, but only at a later stage. 

 The dimensions of the egg and oil-globule show practical agreement. 

 The date of the occurrence of the eggs agrees with Day's record of the 

 spawning season of S. cahrilla. The only other member of the genus 

 known to British waters is S. gigas, Cuv. and Val, mentioned by Day 

 as an occasional and accidental visitor, who also states that " in 

 warmer climates it deposits its ova in shallow water." I do not know 

 of any description of the ova of this species. It does not seem likely, 

 however, that it would spawn successfully here. 



Caranx tradLurus, L. Scad or Horse Mackerel. 



Holt* (lib), p. 9 ; (lid), pp. 116-20 and 340. 



(lit;, pp. 27-31, Figs. 53-63. 

 Canu (Sb;, pp. 63-71. PI. V, Figs. 1-6. 

 Heincke and Ehrexbalm (10), p. 277, Figs. 28-31. 

 Ehrenbaum (5c), p. 234. 



Although this species was exceedingly common olf the coast in the 

 early summer months only one egg was taken. This occurred in the 

 catch of the young-fish trawl taken near the Eddystone on 29th June. 

 It was not closely observed till the following day, when the larva had 



* See also Nortli Sea Investigations, VI. " Tlie Reproduction of Coranx tmchurus," 

 Joura. M.B.A., Vol. Ill, N.S., pp. 11*0-4 (1893-5). 



