APOCRYPTODON 277 



This species occurs on the coasts of China, Korea, and Tsu- 

 shima, a Japanese island in the Strait of Korea. It may be ex- 

 pected in the Batan Islands and along the northwestern coast 

 of Luzon. 



Genus 59. APOCRYPTODON Bleeker 



Apocryptodon BLEEKER, Esq. Syst. Nat. Gobioides, Arch. Neerl. Sci. 

 Nat. 9 (1874) 327. 



This genus is distinguished by the teeth of the lower jaw, 

 which are in one row, deeply bilobed, and more or less hori- 

 zontal ; those of upper jaw are also in one row but are more or 

 less bluntly conical to caninelike, and erect; there are two ca- 

 nines in lower jaw behind symphysis. The elongate body covered 

 with 40 to 60 small scales in a longitudinal series, which are 

 larger posteriorly or along the middle of the sides, and are very 

 easily rubbed off in some species; the dorsal fins may be very 

 close together or well separated. Dorsal VI, 1-22; anal I, 21 

 or 22. 



The genus occurs from the coasts of India to New Guinea. 

 The type is Apocryptodon madurensis, from Java and Madura. 



Key to the Philippine species of Apocryptodon. 



o\ A black line along side from pectoral to caudal; scales about 56, before 



first dorsal 24 A. montalbani. 



a*. No lateral band. 



6 1 . Head and sides with conspicuous small black spots; scales 52, before 



first dorsal 22 A. sealei. 



6*. Body and nape with crossbars; spots on sides of head and pectorals; 

 scales 60, before first dorsal 34 A. taylori. 



139. APOCRYPTODON MONTALBANI sp. nov. 



PLATE 22, FIG. 2 



Dorsal VI, 1-21 ; anal I, 21 ; there are 56 scales in a longitudinal 

 series, 16 in a transverse series, and 24 before first dorsal. 



The elongate subcylindrical body low, the dorsal profile very 

 little elevated and nearly parallel with the ventral profile; the 

 depth contained 7.3 times in body; the head large, broad, its 

 width equal to depth and greater than that of trunk; the short 

 snout convex, with a median terminal hump, 4.8 times in head; 

 the eyes dorsolateral, upward gazing, close together, 0.8 of snout 

 and 6 times in head ; the interorbital space 8 times in head ; the 

 oblique mouth large, the lower jaw included, the posterior angle 

 of maxillary extending beyond eye to lower margin of preopercle ; 

 there are twenty -four teeth in upper jaw, the anterior ones long 

 and curving downward outside over lower jaw; the lower jaw 



