50 THE PLAGIOSTOMIA. 



A short symphyseal fold below the chin. Fins with rounded angles and slightly 

 convex free margins. Dorsals subeqiuil; base of second dorsal longer than the 

 interdorsal space ; origin of first dorsal above the ends of the bases of the ventrals. 

 Anal small, origin below the tip of the second dorsal. Subcaudal longer than 

 the anal; separated from the terminal by a notch. 



Greyish brown, with irregular blotches of brown crossing the body at the 

 nape, between the pectorals, forward of the ventrals, through the dorsals, 

 through the anal and across the caudal. Fins blotched. A lighter spot above 

 each eye. 



Queensland. 



Orectolobus japonicus. 



Plate 56, fig. 3, (heart). 



Crossorhinus barbatus MOller & Henle, 1841, Plagioa., p. 21, pi. 5; Schleqel, 1850, Jap. Pisces, p. 301; 



Dum:6ril, 1865, Elasm., p. 338 (part); Gunth., 1870, Cat. fishes Brit, inus., 8, p. 414 (part). 

 Orectolobus barbatus JoRD. & Fowler, 1903, Proc. U. S. nat. mus., 26, p. 606. 

 Orectolobus japonicus Regan, 1906, Ann. mag. nat. hist., ser. 7, 18, p. 435; 1908, Proc. Zool. soc. Lond., 



p. 356. 



Elongate, depressed in head and body, body cavity half or more of the total; 

 head one fifth, longer than broad; tail slender, compressed in the posterior half. 

 Snout short, broad, blunt, extending very little beyond the mouth. Nostrils 

 below the end of the snout, connected with the mouth by a nasoral groove; 

 anterior valves reaching the teeth, somewhat lobed and fringed, with a median 

 attachment, separated from one another, by a median preoral lobe to which they 

 are attached; each valve with a long slender cirrus, twice as long as the valve, 

 bearing a lobe or fold on the proximal half of the inner side; posterior valves 

 forming a fold around the outer side of the nostril and subcontinuous with the 

 upper lateral fold and a fold along the outer side of the nasoral groove to end in a 

 cirrus or slender point toward the angle of the mouth. Mouth wide, subterminal, 

 close to the end of the snout, with long labial folds, on both jaws, around the 

 angles, the lower almost reaching the symphysis. No transgeneial fold; a short 

 longitudinal fold below the symphysis. Teeth moderate, compressed, with a 

 narrow sharp triangular cusp on three lobes at the base. 



Eyes small, prominent, hardly one third of length of snout, without a fold 

 in the lower lid, without dermal prominences on the top. Spiracles large, twice 

 as long as the eye, lower than the eye and behind a vertical from its hinder angle, 

 elongate, obhque. Above the upper lip there is a group of three barbels, second 

 shortest, third longest. Behind the angle of the mouth on a fold there are five, 

 the first two of which are not entirely separated, the second two more completely, 



