22 ON NEW GENERA AND SPECIES OF FISHES 
FAMILY TETRAODONTIDA. 
SPHEROIDES PERLEVIS sp. nov. 
D. 8; A. 6; P. 16. Body robust, evenly tapering 
from behind the eye, its depth 33, length of head 3in length 
of body. Width of head 13, depth of head 1% in its length. 
Eye moderate, free below, its diameter 24 in length of snout 
and 42 in that of head. Interorbital region feebly convex, 
its width 7# (including eyelids 24) in the head. Lips equal, 
papillose within; lower jaw included; chin prominent. 
Teeth with slightly uneven edges and well marked sutural 
grooves. Width of gill-opening % more than diameter of 
eye, its inner fold slightly protruding upon the inferior 
half. Skin entirely free from spinules, everywhere longi- 
tudinally striated ; lateral ridge strongly developed, but 
less conspicuous on head and distal end of peduncle. 
Lateral line gently curved and slightly undulating to a 
point midway between tip of pectoral and origin of dorsal 
where it descends more abruptly ; thence nearly straight 
to base of caudal ; a transverse line, divided mesially, above 
base of pectoral ; a short branch curving behind the eye ; 
another between hinder margin of eye and lateral ridge ; 
main line carried forward from below hinder third of lower 
eyelid in a wide curve to the nostril; a short disconnected 
line, divided mesially, in front of nostril ; a second line below 
lateral ridge from extremity of pectoral to base of caudal. 
Dorsal fin pointed, its length 24 in its height, which is 2 in 
the head, its distance from the caudal 32 in total length : 
anal fin originating below the middle of, shorter and lower 
than, the dorsal: caudal fin feebly rounded, 43 in total 
length; depth of caudal peduncle immediately behind 
base of dorsal 4 of its width at the same place, its least depth 
42 in the head: pectoral fin rounded, with the upper angle 
slightly produced, 1% in length of head. Upper surface 
lilaceous brown, mottled with gray, and closely dotted and 
lined with darker brown; lower half of sides gray with 
larger violet spots; below pearly white; an irregularly 
oblong, narrow, silvery ring in front of the dorsal.* Dorsal 
and caudal fins violaceous; anal and pectorals whitish. 
Iris golden. (perlevis, very smooth: in reference to the 
complete absence of dermal spinules). 
* Perhaps an individual peculiarity. 
