206 IMCCOHDS OF TUK ArsilIALlAX MCSKFJl. 



pore before tlie eye. Eye minute, hidden in the skin on tlie upper surface 

 of the head. Mouth subvertical, with broad lobate lips ; lower jaw pro- 

 jecting. Mandible with three paired barbies increasing in size backward, 

 and one almost between the median pair. An outer row of exposed 

 subulate teeth in each jaw, which are largest towards the symphyses ; 

 these are followed by a band of villiforra teeth which is widest anteriorly 

 and narrows laterally ; palate toothless. Gill-openings separated by a 

 space equal to that between the posterior ni)strils. 



Body wholly naked, lacking even rudimentary scales. A lateral line 

 is indicated by a groove upon which are large fleshy swellings on the tail 

 pox"tiou. A small gejiital papilla. 



Doi'sal tin commencing above the end of the ventrals, the distance 

 separating it from the gill-opening a little less than that between the 

 latter point and the snout ; the five anterior spines increase regularly in 

 length, the sixth is shorter than the fifth and widely separated from the 

 others ; they ai'e completely united with each othei' and with the rays by 

 a thick membrane. Dorsal rays branched, increasing in length to about 

 the middle of the fin, then decreasing backward ; the last is united with 

 the base of the caudal hj membrane, but its tip forms a free lobe. Anal 

 similar to the soft dorsal. Pectoral small, rounded, with branched rays. 

 Ventrals large, completely united, with a broad basal membrane. Caudal 

 pointed. 



Colourless after long preservation in alcohol. 



Described and figured from a specimen 218 mm. long, fi-om Ripple 

 Creek, Herbert River, Queensland, which is very close to the Murray 

 River whence the typical example was obtained. It differs from I)e Vis' 

 description in being wholly naked and in having branched I'ays in all tlie 

 tins ; the head is less than one-ninth of the total length instead oi one- 

 eighteenth, and there are no palatine teeth. Notwithstanding these 

 disci'epancies, it seems probable that the specimen is correctly identitied 

 as L. iiiorda.f. 



Variiition. — A second specimen from Cooktown, 190 mm. long, is very 

 similar, but lacks the median mandibular barbie. The head is one-tenth 

 of the total length and it has vi/47 rays in the dorsal tin and 40 in the 

 anal. 



Lvcs. — i{i])plo Ci'cek, Herbert Kiver, and Ccioklown, Queensland. 



LeMK I'I UriKASCKNS, /Jr 17}?. 



(Plate xxxi., fig. '.).) 



Leiiir jiin-piirascens, De Vis, Pi'oc. Linn. Soc. N.S.Wah's, ix., lS8l, p. (il»8. 

 <jfol)ioi.(l.ex imrpurasceiitf, Ogilby, Cat. Fish. N.S.Wales, lS,S(i, p. ;!(i. /</., 



Waite, Mem. N.S.Wales Nat. Club, ii., 1904, p. 40. 

 Aiiilil ijopns nitjt'r, De Vis, Proc. Linn. Soc. N.S.Wales, ix., 1884, ]). (598. 



D. vi/87; A. :?(i: P. IC. ? ; V. i/5 ; C. 15 r' Length t.. the vent 1-8 

 in the tail. Head, without the mandible, 7 in the total length, and TO in 

 its distance ivom the vent. Depth before the venti'als 18, pectorals 3, 

 and ventrals l'()9 in the head. 



