246 SOME NEW GENERA AND SPECIES OF FISHES, 



and eight on the other- these teeth are so deeply grooved on the 

 outside as to appear almost bicarinate; each whorl contains ten 

 teeth, while in the anterior rows there are thirteen, some of the 

 inner ones l>eing the largest. 



The teeth of the lower jaw are similar to those of the upper, 

 but the line of demarcation between the anterior and lateral teeth 

 is even less marked, many of those near the dividing line bearing 

 a short blunt median cusp which is succeeded by one or even two 

 smaller cusps, so as to leave only five or six short inconspicuous 

 molariform series. 



The following are the measurements of the jaws : — 



Length of the dentigerous portion of the upper jaw, 78 mm.; 



of the lower, 74 mm. 

 Width at the inner angle of the dentigerous portion: upper 

 jaw, outside 32 mm., inside 5 mm.; lower jaw, outside 

 28 mm., inside 4 mm. 

 Width between last teeth: upper jaw, 61 mm.; lower jaw, 



41 mm. 

 Greatest depth of dentigerous portion: upper jaw, 41 mm.; 

 lower jaw, 37 mm. 



MYRID^. 



SCOLECENCHELYS, gen.IlOV. 



Body very elongate and vermiform, terete. Head small and 

 narrow. Mouth rather large, its cleft extending well behind the 

 eye, the lower jaw much shorter than the upper. Teeth conical, 

 in one or more series in the jaws and on the vomer. Nostrils 

 pierced on the edge of the upper lip, the anterior near the tip of 

 the snout, tubular, and directed downwards, the posterior an 

 oblong slit. Gill-openings small and vertical. Dorsal and anal 

 fins low or subrudimentary, the former originating near the 

 vertical from the vent; no pectorals. Vent close in front of the 

 anal fin. Skin scaleless; lateral line forming a continuous band 

 along the middle of the side. 



Etymology : — o-kwXt;^, a worm; eyxe'kvs, an eel. 



Type : — Mthrcanichthys australis, Macleay. 



