HEMISCYLLIUM TRISPECULARE. 45 



somewhat folded, with a cylindrical cirrus hardly as long as the valve; posterior 

 valves with a fold outside of the nostril and ending in a fold on the outer side of 

 the groove, extending to the angle of the mouth. Mouth medium, transverse, 

 nearer to the end of the snout than to the eye, with short labial folds on both 

 jaws around the angles, not crossing the symphyseal space. No transgeneial 

 fold like that of Chiloscyllium. Eye small, lower lid without a fold. Spiracle 

 moderate, below the hinder part of the eye. First gill opening smallest, third 

 to fifth above the pectoral, fourth and fifth close together, fifth widest. 



Fins rather small, angles rounded; pectorals little the larger; dorsals 

 subequal, origin of first nearly above the end of the base of the ventral, origin 

 of second about three times the base of the first farther back, and about two and 

 one half times the same base forward from the anal. 



Brownish, greyish or yellowish, light below, back, sides and fins with scat- 

 tered irregular spots of darker brown and, on young, with ten or more indefinite 

 transverse bands of brownish. Above the end of each pectoral base there is a 

 large white-edged rounded spot of black. 



New Holland; Australia; New South Wales. 



HEMISCYLLIUM TRISPECULARE. 



Hemiscyllium trispeculare Richardson, 1843, Icon., p. 5, pi. 1, f. 2; 1848, Erebus & Terror, Fish., p. 43, 

 pi. 28, f. 3-7; Dumeiul, 1853, Rev. et mag. zool., Scyll., p. 35; 1865, Elasm., p. 326. 



Chiloscyllium trispeculare Gunth., 1870, Cat. fishes Brit, mus., 8, p. 411; Regan, 1908, Proc. Zool., 

 soc. Lond., p. 359. 



Similar in outlines to H. ocellatum, apparently with the origin of the first 

 dorsal a trifle farther back, the base of the anal a little shorter and the posterior 

 extremities of the dorsals more angular. The space between the bases of the 

 dorsals is about one and one half times the base of the second. Anal base short, 

 nearly equal to that of the second dorsal. The mid total length is behind the 

 first dorsal. 



Body short, little more than one third of the total; snout short, blunt. 

 Caudal region, long, slender. Nostril inferior, near end of snout, with a nasoral 

 groove; anterior valves extending to the mouth, widely separated by the pre- 

 oral attachments, with cirri; posterior valves with a fold at the outer side of the 

 nostril, continued in a fold on the outer side of the groove with a short free 

 extremity at the angle of the mouth. Mouth moderate, with labial folds on 

 both jaws around the angles, not crossing behind the symphysis. No geneial 

 fold across the chin. Eye small, lower lid without a fold. Spiracle small, below 



