ATJLORHYNCHID.E. FISIULARIID-E. 
373 
Aulorhynchus sumatrensis (W. v. d. Marck). 
1870. 1'rotosynynathug sumatrensis, W. von der Marck, Palseontcgr. 
v °k xxii. p. 407, pi. xxiii. fig. 1. 
18/6. Auliscops sumatranus, A. Gunther, Geol. Mag. [2] vol. iii 
P- 434, pi. xv. fig. 1. 
Imperfect fish ; Royal Geological Museum, Dresden. 
Hie type species of the so-called Protosyngnailms, attaining a 
ength of about 0-35. Length of head with opercular apparatus 
occupying about one quarter of the total length of the fish ; caudal 
pedicle shorter than the head. All external bones finely tuber- 
culated. Vertebra apparently 27 in the abdominal, 31 in the 
caudal region. Dorsal and anal fins arising at the 12th caudal 
v ertebra, each comprising about 12 rays. 
Porm. Loc. Freshwater Tertiary Formation : Padang, Sumatra. 
47507. Specimen described and figured by Gunther, loc. cit. Ihe 
caudal fin-rays are imperfect distally, so do not exhibit 
the precise shape of the fin. 
Presented, by H err R. D. M. I erbeelc , 18/ 6. 
47508-11. Four imperfect specimens noticed by Gunther, loc. cit. 
Presented by Herr R. D. M. 1 erbeelc, 18/ 6. 
Family FISTULARIID/E. 
Irunk elongated, and snout much produced into a tube, I re- 
'naxilla excluding maxilla from upper margin of mouth, which is 
srn all and terminal ; teeth minute or absent. Gills pectinated ; 
cporeular apparatus complete. Four anterior vertebra much 
elongated and fused together, all those of the abdominal region and 
■‘■’Onie anterior caudals with large transverse processes ; ribs rudi- 
mentary or absent. Pelvic fins without spine, but with 5 or 0 
divided rays; free spines in front of dorsal fin rudimentary or 
absent ; anal fin without anterior spine, opposed to the soft dorsal ; 
caudal fin distinct. Skin naked or with small scales. 
_ Only three genera of this family are known, two being still widely 
distributed in tropical seas. 
Synopsis of Genera. 
^ 0 free dorsal spines ; caudal tin forked, with 
elongated median rays ; no scales 
-V series of free dorsal spines ; caudal fin rhombic, 
without elongated rayj small ctenoid scales 
present 
Imperfectly known, but all caudal fin-rays much 
elongated; no scales 
Fistularia (p. 374). 
Aulostoma (p. 375). 
Urosphen (p. 376). 
