380 
ACTINOrTERYGII. 
anterior spinous ; paired fins, anal and caudal fins always present. 
Trunk encased in rings of bony plates ; no scales. 
The existing Solenosloma inhabits the Indian Ocean. 
Synopsis of Genera. 
Trunk much compressed, somewhat dilated ; 
pelvic fins opposite anterior dorsal .... Solenosloma (Recent). 
Trunk more elongated, not dilated ; pelvic .. 
tins in advance of anterior dorsal ...... Solenorhynchus (p. 
Genus SOLENORHYNCHUS, Heckel. 
[Sitzungsb. k. Akad. Wiss., math.-naturw. Cl. vol. xi. 1854, p. I- 1 ’ - ] 
Trunk extremely elongated and slender ; caudal region relati' e ly 
short. Pelvic fins in advance of anterior dorsal ; posterior dorsu 
and anal fins similar and directly opposed; caudal fin very larg®» 
not forked. Trunk encircled completely in the bony dermal ric D s - 
Solenorhynchus elegans, Heckel. 
18o4. Solenorhynchus elegans , J. .T. Heckel, loc. cit. p. 125. j. 
1868. Solenorhynchus elegans, Kner & Steindachner, Denksc r. 
Akad. Wiss., math.-naturw. Cl. vol. xxi. p. 31, pi. v. fig- !• 
1874. Solenorhynchus elegans, A. de Zigno, Mem. R. Istit. ^ ene ’ 
vol. xviii. p. 297, pi. x. fig. 5. 
Type. Imperfect fish ; Royal Court Museum, Vienna. 
The type species, attaining a length of about 0*1. Head 
opercular apparatus occupying about one quarter of the total 
of the fish to the base of the caudal fin. Pelvic fins beneath > 
16th body-ring ; anterior dorsal fin with 5 spines, arising b e 
21st ring ; posterior dorsal and anal larger, with 17 rays, separa c ^ 
from anterior dorsal by 12 rings ; caudal fin with 1 2 rays. A 
36 body-rings in the abdominal, 9 in the caudal region, pro'” 01 
with few small and delicate spines. 
Form. 4- Loc. Upper Eocene: Monte Postale, N. Italy. 
Not represented in the Collection. 
Family SYNGNATHIDiE. 
Trunk more or less elongated; snout much produced into a tube, 
and small toothless mouth terminal. Gills tufted, in form ° 
rounded lobes ; opercular apparatus reduced to operculum ; S’ 
opening very small. Pelvic fins absent; one soft dorsal fin 5 
