HALIEUTOPSIS TUMIFRONS. 91 
rounded groove in front of the illicial niche to favor motion forward 
and downward and protrusion directly in front of the mouth,  Lllicium of 
medium size, possessed of greater freedom of movement than in most 
allied species, bearing two large lateral spherical bulbs between which rises 
an erect narrow thin leaflike third one that is notched at the top in a 
couple of wormlike prolongations, Plate XXV., Fig. 4. The arrange- 
ment of the spines around the cavity is such as to compel the attention 
of the prey to the escal bulbs from the front, rather than the sides; the 
bulbs themselves, as in other species, are capable of movement forward 
and down so as to expose the hinder surfaces. Nasal sacs prominent, 
facing obliquely upward; nostrils small, anterior minute. Mouth com- 
paratively small, width one third of that of the disk; lower jaws longer. 
Teeth in villiform bands on jaws and tongue, absent from vomer and 
palatines. Eyes small, orbit little more than the length of the snout. 
Interorbital space wide, width twice the length of the orbit, equal to 
the depth of the swollen margins of the disk opposite the eyes. Gills 
two, none on the first and fourth arches; rakers, somewhat pointed 
small fleshy tubercles, five on the first arch, four on the second; gill open- 
ings small, placed superiorly, well forward and toward the side of the 
tail, in the axilla. Scales harsh, strong, firmly set, radiate-based tubercles, 
acicular to bicuspid on the central portions of the back, bicuspid to tri- 
cuspid or multicuspid around the outer margins of the head, absent from the 
ventral surfaces except around the edges. At the borders the tubercles 
are joined together and to the marginal bones, thus contributing materi- 
ally to the tumid condition of those localities; the spines at the sides 
and the front of the rostrum are strong; those at the sides of the tail 
are commonly bicuspid; the concave space of the top of the snout is 
naked or covered only by the spreading bases of the spines at the 
edges. Subopercular process short and thick, in the specimen described 
having four spines, in others five or six. Lateral line distinct along the 
sides of the tail, deeply channeled around the edges of the disk; of the 
five sensory papillee below each mandible the second is placed immedi- 
ately in front of the space between the first and the third. The fleshy 
lobes and their fringes over each papilla, between the protecting spines, 
are feebly developed. Tail distinct, round, moderately strong at the disk, 
tapering little in the anterior two thirds of the length, thence becoming 
small more rapidly to the caudal fin. Carpals almost entirely included 
