168 
ZOOLOGICAL LITERATURE. 
Mr. Cope has described a new genus belonging to the Amiurina, which he 
has named Gronias j it is blind, the eyes being rudimentary, covered by the 
/ corium ; ventral rays eight. G. niyrilabris, sp. n., from Pennsylvania. It is 
n 1 occasionally caught by fishermen, and is supposed to issue from a subterranean 
stream, said to traverse the Silurian limestone in Lancaster county, and 
discharge into the Conestoga. Proc. Acad. Nat. Sc. Philad. 1864, p. 231. 
Fimelodus. Dr. Bleeker (Silur. Surin. in Natuurk. Verhand. Holl. Maatsch. 
Wet. Haarlem, 1864) has described the following known species : Pimelodiis 
sebca (C. & V.), which he has confounded with Pimelodus qiceleni (Q. & G.), 
naming li.Iihamdia queleni, p. 76 j Pimelodus ornatus (Kner), p. 77; and 
Pseudorhamdia macronema (Dlkr.), p. 79, tab. 14 & tab. 13. fig. 7 [which we 
consider identical with Pimelodus maculatus, Lac^p.]. 
. Pimelodus altipimis, sp. n., Steindachner, Sitzgsber. Acad. Wise. Wien, 
1864, xlix. p. 213, taf. 2. figs. 3 & 4, from Demerara. 
Arius. The following known species have been described and figured by 
Dr. Bleeker, Silur. Surin. in Natuurk. Verb. Holl. Maatsch. Wet. Haarlem, 
1864 : A. diep’irinki (Blkr,), p. 60, tab. 10 *& tab. 12. fig. 3 ; A.Jissus (C. & V.), 
p. 62, tab. 4. fig. 1 ; A. arenatus (C. & V.), p. 63, tab. 4. fig. 2; A. {Hexane^ 
matichthys) surinamensis (Blkr.),p. 66, tab. 6. fig. 2 & tab. 12. fig. 1 ; A. (^Hexi) 
hymeim'rlmvus (Blkr.), p. 67, tab. 11. fig. 2 & tab. 13. fig. 4 ; A. quadriscutis^ C. 
& V. (identified by Gunther with A.parkeri, Traill, and very closely allied to 
A. luniscutis, C. & V.), p. 69, tab. 8 & tab. ik fig. 2; A. horzberyii (C. & V.), 
p. 60, tab. 9 & tab. 13. fig. 3 (A. pemecus, C. & V., is considered identical 
with this species) ; A. proops (C. & V.), p. 62, tab. 7 & tab. 12. fig. 2 ; A. (Ne- 
^wma) c/tffciws (Blkr.), p. 63, tab. 16. fig. 2 & tab. 13. fig. 6. 
Arius stricticassis (C. & V.). We are indebted to Dr. Bleeker for a descrip- 
tion and figure of this species, which had been insufficiently characterized by 
Valenciennes. It has seven soft dorsal rays, and is allied to Arius milberti\ 
there is no separate interneural shield. Silur. Surin. p. 49, tab. 6 & tab. 12. 
fig. 4. 
Arius Jissus. The eggs of this species are comparatively very large ; and it 
would appear from an observation made by Dr. Gunther that the males carry 
the eggs in their mouth, depositing them in places of safety, and removing 
them when they fear the approach of danger or disturbance. Oatal. Fish, 
v. p. 173. 
JElurichthys. Dr. Bleeker has described two of the known species of this 
genus (Silur. Surin. in Natuurk. Verb. Holl. Maatsch. Wet. Haarlem, 1864), 
viz. JElurichthys yrmoeii (C. & V.) under the name of Pimelodus bagre, p. 66, 
and Mlurickthys longispinis (Gthr.) under that of Phnelodus JilamentosuSy 
adding to the latter the- synonymy which properly belongs to JEl. marinus 
(Mitch.). 
Ageniosus axillaris, sp. n., Gunther, v. p. 431, from Surinam. This species 
appears to have been confounded by Dr. Bleeker with A. hrevijilis (C. & V.), 
Silur. Surin. p. 83, taf. 16. fig. 1, 
Ageniosus militaris. Dr. Bleeker directs our attention to the dorsal spine 
of this species, which, according to Bloch, is longer than the head, whilst it 
is much shorter in the specimens examined by Valenciennes, Thinking that 
this discrepancy can be accounted for only by assuming that Bloch and 
Valenciennes have examined two distinct species, he proposes the name of 
