ADDITIONAL ADDENDA . 
Since tlie publication of Part III of tins work a number of 
new genera and species of fishes have been described from 
localities within our limits, and our knowledge regarding the 
relations and distribution of previously known species has 
been enlarged. These additions and corrections are given in 
the following pages : 
Pas;e 130. After Hexamenatichtliys rugispinus (Cuvier & Valenciennes), 
insert the following : 
19.} (a). G.4LE1CHTHYS LABIATIS (Boulenger). 
Head 3+; width of head in its length; depth 5; eye 9 in head. 
D. I, 7; A. 17. Band of premaxillary teeth 4 times longer than wide, the 
width half the eye; palatine teeth conical, in 2 small oblique groups, 
much smaller than eye, and separated by a space equal to f the length of 
premaxillary band; eye situated above level of mouth, in anterior half of 
head, 4 in interocular space ; occiput and occijiital prolongation granular, 
this last a little longer than wide, with an obtuse spine; fontanelle 
narrow, not distinct, followed by a groove which does not reach the 
occipital i^rolongation ; lips thick, the upper overhanging the lower, as in 
G. rugispinus, to which this species is closely related; barbels flattened; 
r maxillary Ij in head, not reaching edge of opercle; external mandible 1^ 
times as long as internal, 2 in head; gill membrane with a free, unbroken 
edge ; dorsal spine with indistinct serrations, covered with skin, its length 
a little less than 4 head; adipose dorsal as long at base as rayed dorsal, 
twice as far from it as from the caudal; humeral prolongation smooth; 
pectoral spine 24 in head, enveloped in skin like the dorsal spine, much 
shorter than the so It rays ; ventral shorter, reaching origin of anal ; caudal 
deeply forked, with pointed lobes ; caudal peduncle 2.4 times longer than 
deep; no maxillary pore. Blackish gra3’ above, silvery below ; all the fins 
blackish. Length 470 mm. Known only from a single specimen from 
Rio Peripa, Ecuador. IBoulenger. j (laiiiafus, having large lips.) 
Arius lahiatus, Boulexoer, Bollettino dei Mas. di 2ool. eil. Aiiat. Cimii). della Fiiiv. di 
Torino, Vol. xill, Xo. 329, G, Dee. 2, 1898, Rio Peripa, Ecuador. (Coll. Hr. Enrico 
Festa.) 
3 127 
