. Annual report of the Board of Regents of the Smithsonian Institution . he family of Antennariids is segregated from all others by acombination of characters. The body and head are more or lesscompressed, or at least not notably depressed as in the anglers; the ANGLER FISHES—GILL. 575 mouth is cleft very obliquely and in some even vertically; the bran-chial apertures are in or behind the lower axis of the pectoral fins,these fins themselves are well developed and so articulated with thepseudobrachia or false arms as to form elbowlike joints, the finsbeing dirigible downward and forward; the p
. Annual report of the Board of Regents of the Smithsonian Institution . he family of Antennariids is segregated from all others by acombination of characters. The body and head are more or lesscompressed, or at least not notably depressed as in the anglers; the ANGLER FISHES—GILL. 575 mouth is cleft very obliquely and in some even vertically; the bran-chial apertures are in or behind the lower axis of the pectoral fins,these fins themselves are well developed and so articulated with thepseudobrachia or false arms as to form elbowlike joints, the finsbeing dirigible downward and forward; the pseudobrachia areformed by actinosts moderately elongated and only reduced to threeon each side; the ventrals are of moderate size and provided with five(or four) rays, and the spinous dorsal is variously developed, mostlyAvith three spines, but represented by at least a rostral tentaclelikeray. These characters are associated with various osteological j^e-culiarities, the most notable being the development of upraised haemalspines to most of the abdominal vertebra?.. Fig. 9.—Pteiupluync histrio. After Jordan and Sindo. As so limited, the family embraces a dozen or more genera whichrepresent three groups of supergeneric value, the subfamilies A7iten-narmue, Brachionichthyirut, and Chaunacina\ The two most generalized of the three groups have the body andhead notably compressed, and the first dorsal fin is represented bythree raj^s, the foremost of which is generally reduced to the form ofa rostral tentacle, while the second and third are robust spines; thesoft dorsal is well developed. The two groups are in their turn dis-tinguished by well-marked characteristics. The least specialized species have the body oblong claviform, themouth is comparatively small, the palate unarmed, the pelvic bonesare short, and the twenty or thirty dorsal rays are approximated 576 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1908. and well connected by membrane, so that a real fin is gr
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