558 REPORT ON ZOOLOGY ; MDCCCXLIV. 



Id. (ib.) has instituted a genus Onus, also belonging to the Squamipennes, 

 and which had also received a name from Lowe, Leirtts. Lowe was 

 acquainted with but one species, L. Bemiettii, to which Valenciennes adds a 

 second, C. Berthelotii, with the following characters : Corpus compressuin, 

 antice carinatum, squamis deciduis kevibus omuino vestiturn ; caput parviun, 

 truncatum, squamosum ; prajoperculum in limbo sulcatum, ad margiuem 

 integruni neque aculcatum; operculum, suboperculum, interoperculum, 

 absque spiuis aut serrulis, sed subciliata ; denies setacei minimi in um'ca 

 serie ; palatum glabrum, edentuluin ; pinna? dorsalis, analis, caudalisque 

 squamosse; membrana branchiostega radiis sex. C. Bennett ii, D. 7, 31; A. 

 3, 25. C. Berthelotii, D. 4, 34 ; A. 3, 22. 



Kroyer (Naturhistorisk Tidskrift, 1844, p. 213) has instituted a new 

 species in the genus 0-plegnathus, Rich, (vid. Archiv, 1841, ii, p. 136) : 0. 

 fasciatus. Altissimus, valde coinpressus; altitudo dimidium ferine aequat 

 piscis longitudinern, crassitudiuemque ter ad minus superat. Caput quarta 

 longitudinis parte parum majus. Color uigricans, fasciis luteis transversis 

 verticalibus quiuque. D. 11, 1G ; A. 3, 12. Peru. The author is not inclined 

 to place the genus near Scams, but among the Squamipenues, on account of the 

 compressed and lofty figure of the body, the fleshy and squamous fins, the 

 very minute and ciliated scales, the conformation of the pharyngeal bones 

 and their teeth, the length of the intestine aud the number of caca, the 

 unbroken lateral lines, &c. 



There is, perhaps, no doubt of the genus Scarodon, instituted by Schlegel, 

 in the Fauna Japonica (p. 89), being identical with the above, and to which 

 two species are referred : Sc. fasciatus, figured in Krusensteru (Atlas, tab. 

 52, f. 2), and probably not differing from 0. fasciatus, Kroyer. Sc.punctatus, 

 with numerous dark points of various sizes. 



Li the family of the Labyrintliibranchii, a new genus Ctenopoma has been 

 instituted by Peters. (Bericht der Acad. z. Berlin, 1844, p. 34.) Oper- 

 culum with two crescentic incisions and three pectinate lobes, teeth on the 

 vomer and palate, numerous rays in the dorsal and anal fins. Ct. multispinis, 

 near Quellimana, in a brook. 



In the family of the Scomberoidei, we have in the year IS 44 contribu- 

 tions only by Schlegel, in the Fauna Japouica. In which work a Scomber 

 scombrus japonicus is noticed, which would seem to come near the Cape 

 variety; and a Scomber pneumatopkorus japonicus is figured in a small and 

 a larger variety. In the same place are described five species of Thynnus. 

 Th. orientalis has short pectoral fins, like brachyptents, but has one more 

 ray in the first dorsal fin, and the false fins are placed very near the second 

 dorsal and the anal fins. Th. tliitnuina.Th.pclamys. Th. sibi, with very 

 long pectorals, approaches Th. argentimttatus, but the first false fins are con- 

 nected with the dorsal and anal. T. macropterus, anal and second dorsal 



