BY W. MACLEAY, F.L.S. 49 



643. Mirxus elongatus, Gunth. 

 Proc. Linn. Soc. N.S. Wales, Vol. IV., p. 426. 



Hobson's Bay. Port Jackson. 



Division XII. ACANTH. GASTEEOSTEIFORMES. 



Spinous dorsal fin composed of isolated spines if present ; the 

 ventrals have an abdominal position in consequence of the 

 prolongation of the pubic bones, which are attached to the 

 humeral arch. 



Family XXXIII. FISTULAEID^. 



Of greatly elongated form ; the anterior bones of the skull 

 much produced, forming a long tube terminating in a narrow 

 mouth. Teeth small. Parts of the skeleton and dermal produc- 

 tions form external mails ; scales none or small. The spinous 

 dorsal either absent or formed of isolated feeble spines ; the soft 

 dorsal and anal of moderate length ; ventral fins abdominal, of 

 six rays, without spine, separate from the pubic bones, which 

 remain attached to the humeral arch. Five branchiostegals ; air- 

 bladder large ; four gills ; pseuclobranchioe ; pyloric appendages 

 in small number ; intestinal tract short ; vertebra3 very numerous. 



Genus Fistularia, L. 



Body scaleless. Caudal fin forked, with the two middle rays 

 prolonged into a filament ; no free dorsal spines. Teeth small. 



Tropical Seas. 



644. Fistularia serrata, Cuv. 



Gunth., Cat. Fishes III., p. 533. 



B. 7. D. 13-15. A. 14-15. V. 6. C. 2 x 6/2/6 x 2. Vert. 

 47/34 (Eiip.). 47/29 (Rosenth.) 



