130 PROCEEDINGS OF THE ACADEMY OF 



The specimen figuredby Richardson is a female. The male is distinguished 

 by a more slender and elongated body, and by a first dorsal, about a third 

 higher than that of the female. The first dorsal has also a black spot margined 

 with white at the posterior angle, and the two bars of the caudal which are 

 present in the female are absent in the male. There are also two rows of 

 blue spots on the anal of the female, which are not mentioned in Richardson's 

 descriptions: these spots are replaced in the males by two corresponding lines. 

 Richardson simply states that his fish has a narrow streak of dusky brown 

 near the lower border of the anal. There can, however, be no doubt as to the 

 specific identity of these three varieties. Mr. Stimpson dredged specimens at 

 Hong Kong from a depth of eight fathoms. 



2. S. lineolatus. 



Syn. Callionyme lineolo, \ Val. Hist. Nat. des Poissons, vol. xii. p. 



Callionymus lineolatus. J 307. 1837. 



This species is quite distinct from the preceding, which has been compared 

 with it by Sir John Richardson. 



3. S. ocellatus . 



Si/n. Callionymus ocellatus. Pallas, Spicilegia Zoologica, Fasc. octav. p. 26, 

 pl.iv. figs. 1, 2, 3. 1770. 



(Callionime,) l'oeille Daubent. Enc. Method, vol. 3, Poiss. pp.75, 277. 1787 

 Le petit Argus, ) Bonnaterre Tableau Encyc. Method., Ichthyologie, 



Callionymus ocellatus, J p. 43. 1788. 



Callionymus ocellatus, Artedi Genera Piscium, Walb. ed. p. 608. 1792. 



" " Linn. Systema Naturse, Gmel. ed. p. 1154. 1793. 



Callionyme pointille, ) Lacepede Hist. Nat. des. Poissons, vol. 2, pp. 



Callionymus punctulatus, J 328, 340. 1800. 



Callionymus ocellatus, Blocu Systeina Ichthyologine Schneid. ed. p. 40. 1801. 

 Callionyme ocelle, | Val. Hist. Nat. des Poissons, vol. 12, p. 309. 



Callionymus ocellatus, J 1837- 



Callionymus ocellatus, Blkr. Natuurk. Tijd. v. Ned. Ind. vol. 8, p. 422. 1855. 



4. S. opercularis. 



Syn. Callionyme a grand opercules, \ Val. Hist. Nat. des Poissons, vol. 

 Callionymus opercularis, ) 12, p. 305. 1837. 



5. S. opercular o i des . 



Syn. Callionymus opercularoides, Blkr. Natuurk. Tijd. v. Ned. Ind. vol. 1, 

 p. 32. 1S50. 



A third genus with the branchial apertures in the same position as Sy7ichi- 

 ropus, is readily distinguished from that genus, as well as from the true 

 Callionymi, by its first articulated ray ; this ray is unbranched and much 

 longer than the following, from which it is almost entirely separated, and is 

 only connected with the spinous ray. To the only known species, the name 

 of Callionymus dactylopus has been given. As the specific name alludes to the 

 principal generic character, and is also much more appropriate as a generic 

 than a specific one, it is now conferred on the genus, and the name of its author 

 is given as a specific one. 



III. Dactylopus, Gill. 



Aperturre branchiales parvse, lineares, post opercula. Primse ventrale radiis 

 spinoso et quinque articulatis, radio primo articulato simplici, elongato, radio 

 spinoso conjuncto, a ra'iiis ramosis disjuncto. Pinna dorsalis prima spinis 

 duobus primis filiformibus, lougissimis, aliis filiformibus sed brevioribus. 



1. D. Bennetti. 



Syn. Callionyme a doigt libre, )Val. Hist. Nat. des Poissons, 



Callionymus dactylopus, Ed. Benn., ) vol. 12, p. 310. 1837. 



Callionymus dactylopus, Blkr. Naturuk. Tijd. v. Ned. Ind. vol. 3, p. 559. 



1852. 



[April, 



