32 ANNALS OF THE QUEENSLAND MUSEUM. 
and possibly 0. lineolatus* from Sahel Alma in the same locality 
and formation. The genera associated with these Mesozoic fossils 
are essentially marine. 
The following is a brief synopsis of the three recognized 
gonorhynchoid genera : — 
a. Dorsal and ventral fins inserted mesially. 
b. Head scaly ; mouth wholly toothless. Fresh-water Tertiary fishes 
Notogoneus 
61. Head naked ; teeth present on the pterygoid and hyoid bones. Marine 
cretaceous fishes Gharitosomus 
al. Dorsal and anal fins inserted posteriorly. 
c. Head scaly ; teeth present on the pterygoid and hyoid bones. Recent 
marine fishes Gonorrynchus 
■ 
GONORRYNCHUS Gronovius. 
Gonorrynchus Gronovius, Zoophyl., i, p. 55, 1763. 
Gonorhynchus Cuvier, Regne Anim., ed. i, p. 196, 1817 {gonorynchus) — Cuvier 
Valenciennes, Hist. Nat. Poiss., xix, p. 207, 1846 — Schlegel, Faun. 
Japon., Pise. p. 217, 1846— Kner, Reise Novara, Fisch. p. 342, 1867— 
Giinther, B. M. Catal. Fish., vii, p. 373, 1868. 
Eynchana Richardson, Zool. Erebus and Terror, Fish. p. 45, 1845 (greyi). 
Body anguilliform, compressed posteriorly. Scales subquad- 
rangular, with the free border feebly rounded. Lateral line 
complete, nearly straight, the tubes simple. Head almost wholly 
scaly ; a single short median barbel in front of the mouth ; lips 
thick and profusely ciliated ; a transverse membranaceous lobe 
dependent from the roof of the mouth ; maxillary entirely hidden 
when the mouth is closed. A small patch of short granular teeth 
on each pterygoid region, opposed to which is a rather larger patch 
on the hyoid arch. Nostrils anterior and contiguous. Eyes large, 
median, superolateral, covered with a transparent skin. Fins partly 
scaly ; dorsal inserted near to the commencement of the posterior 
third of the body ; pectoral asymmetrical ; ventral nine-rayed ; a 
long scaly appendage above the pectoral and ventral fins. Yent 
close to the anal fin. Grill-opening rather small ; gill-membranes 
attached to the isthmus ; four branchiostegals ; pseudobranchia3 
present; a fringed gill-like organ between the last gill-arch and the 
pectoral arch; gill-rakers long and slender; no air-bladder. Stomach 
simple, without blind sac; intestinal canal simple and straight. 
(ywvia, an angle; pvyxos, snout). 
* Splenognathus Uneolatus Picted Humbert, Nouv. Rech. Poiss. Foss. Mont 
Liban, p. 56, pi. iv, figg. 4-7, 1866. 
