108 DEEP SEA FISHES. 
yet through their activity and abundance of fin surface they appear to have 
maintained their places on the upper levels. Though nearly coincident with 
the Discoboles in horizontal distribution, compared with them very few 
indeed belong to the deep sea. The seasonal migrations of the Cottoids 
have a considerable range vertically; many species descend a hundred and 
fifty fathoms or more and thus intrude themselves into the list of fishes 
habitually dwelling below the hundred fathom level. The greatest depth 
given for a member of the group is that of Cotlunculus inermis, taken by the 
Steamer “ Ingolf” at nine hundred and fifty-seven fathoms, off the north- 
eastern coasts of Iceland, and Cottunculus Thomson’ is close upon this with 
a depth of nine hundred and twelve. An approach toward these is that of 
Cottus bathybius, secured by the “Challenger,” south of Yedo, Japan, in five 
hundred and sixty-five fathoms. A fair idea of the representation below a 
hundred fathoms may be obtained from the list of species. 
TRIGLOIDS. 
Several species belonging to this group appear in the collection. One or 
two of the new ones, Peristedium barbiger and P. crustosum are somewhat 
questionable additions to the number of deep sea species, though taken at 
various depths between fifty-six and a hundred and eighty-two fathoms. 
Agonus decagonus, as taken in the “ Ingolf”’ collections, is from the greatest 
depth as yet noted for the group, seven hundred and twenty nine fath- 
oms, off the northern coasts of Iceland. Peristedium Rivers-Andersoni 
Alc., was obtained by the ‘‘ Investigator” off Colombo, Ceylon, in depths of 
one hundred and forty two to four hundred fathoms. 
TRIGLIDZ. 
Prionotus frontalis sp. n. 
Br. ry. 7; D. XI, 11; Av Wks VV: 6; RP. 12-3; Li. 103, sealess Ltr: 
8 + 20. 
Form less elongate, head more prominent in the orbital region, groove 
between the orbits narrower and deeper, and the lateral bones of the snout 
less produced than in Prionotus miles Jen. Body comparatively short and 
stout, tapering rapidly from the skull, depth nearly one fourth of the entire 
length; vent midway from the front of the orbit to the base of the caudal. 
ae 
