34 Fisces. 
PISCES. 
Haplochilus floripinniSy Cope, figured in Wheeler’s Rep. 1. c. pi. xxviii. 
figs. 4 A & B. 
'i Rivulus poeyiy sp. n., Steindachner, 1. c. p. 165, Para. 
4 Bivulus cylindraceuSy Poey, figured ; Poey, An. Soc. Esp. v. pi. viii. 
fig. 4. 
Orestias hairdi, ortoni, and frontosus, spp. nn., Cope, J. Ac. Philad. 
viii. pp. 185-187, Titicaca. 
Platypcecilus mentalis, sp. n., Gill, P. Ac. Philad. 1876, p. 335, Panama. 
ProtistiuSy Cope (1874), belongs to the Gyprinodontidce ; Cope, 1. c. 
p. 185. 
SCOMBRBSOCIDJ]. 
Belone hians, C. V., described from Acapulco ; Steindachner, op. cit, 
Ixxii. p. 92. . )/ 
Belone pacificay p. 93, Panama and Acapulco, and amazonica (? = 
micropsy Gthr.), p. 94, River Amazon, id. 1. c., spp. nn. 
Belone tceniatay Gthr., = B. guianensisy Schomb., undescribed, and 
Gunther is wrong in referring the figure so-named by Schomburgk to 
B, truncatciy Les. ; id. 1. c. p. 96. 
StERN0PTYCHIDJ5. 
/' / 
^ Maurolictis australisy Hect., = M. amethystino-punctatuSy Cocco, from 
the Mediterranean ; Gunther, Ann. N. H. (4) xvii. p. 399. It is x Gono- 
stoma y Hutton, Tr. N. Z. Inst. viii. p. 215. 
ScOPELIDJ]. 
Scopeliis hectoriSy sp. n., Gunther, Ann. N. H. (4) xvii. p. 399, Cook’s 
Strait. 
StOMIATIDJ!]. 
IdiacanthuSy g. n. Head of Stomias ; body long, riband-like, much 
. lower than the head, scaleless ; dorsal fin very long, only the hindmost 
rays articulated, close together and united by a membrane, the anterior 
ones very slender, almost membranous, simple, separate, standing behind 
a curved pointed spine ; anal equally long, the posterior rays similar 
to those of the dorsal, the anterior simple, separate, very slender, 
and situated either behind the root of a single spine, or between a pair 
of spines ; no pectorals ; ventral composed of six articulated branched 
rays, situated on the belly behind the first third of the total length ; a 
series of phosphorescent dots on lower surface of head and body ; gill- 
opening very wide ; branchiostegals numerous ; gills four ; no pseudo- 
branchia. Remarkable by the absence of the pectoral fins, the other fins 
being present. Type, I. fascioloy sp. n., D. '. 70, A. 41. Two specimens 
found in the waters to the north of Australia and of New Guinea. The 
syngnathoid characters of the dorsal and anal rays might suggest incom- 
plete development, but the condition of the head and the ventral and 
