364 Mr. P. W. Bassett-Sraith on 



hamulus anterior will be seen to have a short basal spur, 

 which he does not mention ; they were generally taken with 

 C carangts of Kroyer *, which is easily distinguished from 

 them by the absence of the small chitinous booklets on the basal 

 plate of the third peraeopods, by the much smaller furcula, by 

 the more rounded genital segment, and the greater size of the 

 fourth pair of legs. 



Male. — Taken from Caranx melamphigus. 



Carapace much broader than long, narrowing quickly 

 anteriorly and slightly at the posterior angles. Frontal plate 

 very wide, deeply concave in front, the lunulas, which are 

 large, projecting considerably forward. 



The posterior antenna? have a very short strongly curved 

 terminal claw, which is very different from the long slender 

 one of the female. 



Hamulus anterior of moderate size ; both basal and terminal 

 spurs are much larger than in the other sex; the thoracic 

 appendages are not altered. 



Genital segment about one third as long as the cephalo- 

 thorax, oblong in form, though narrowing anteriorly ; about 

 the juncture of the middle and the last third are three fine 

 hairs placed close together and a single one at the posterior 

 angle. 



Abdomen nearly square, about one third the length of the 

 genital segment, bearing the two short caudal plates. 



Length 3-1 millim. 



Caligodes, Heller. 



Caligodes carangis, sp. n. (PL XI. fig. 4.) 



This genus was formed by Heller j" to include an animal 

 described by Kollar as Chondrocanthus lanciniatus, after- 

 wards referred by Kroyer $ to Yan Beneden's genus Sciceno- 

 philus as 8. lanciniatus. 



The original specimens were taken from a species of 

 Belone and are preserved in the Vienna Museum, being fully 

 described by Kroyer. 



On examining large numbers of the larger specimens of 

 fish of the genus Caranx in the Aden market, 1 was struck 

 by the frequency with which one saw on the palate of C.ferdau 

 two small hemorrhagic tumours, placed far forwards near the 

 middle line; on closer inspection there were seen hanging 



* ' Bidrag til Kundskab,' 1863, pp. 69-70. 



t ' Reise der Fregatte Novara,' p. 180. 



t 'Bidrag til Kundsknb,' 1863, pp. 153-157. 



