210 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Genus 119. MIONORUS Krefft. 
This genus differs from Amu i only in having the preopercle entire at all ages and the lateral 
line complete. The typical species ( lunatm ) has the body very deep and compressed and the dorsal 
spines elevated. Scales large (20 to 26) and weakly ctenoid; dorsal spines 7 in typical species, the soft 
dorsal and anal with 9 to 12 rays. 
Small fishes, similar in habits to the species of Arnia, Foa, and Apogonichthys, found in tropical 
seas in sandy bays or among corals. Several species known. 
Mionorus Krefft, Proc. Zool. Soe. Loud. 1867, 942 ( lunatus ). 
161. Mionorus waikiki (Jordan & Evermann). Plate 35. « 
Head 2.4 in length; depth 3; eye 3.2 in head; snout 4.6; interorbital 6; maxillary 2; D. vii-i, 8; 
A. ir, 7; scales 2-24-5. 
Body short, stout, and compressed; dorsal outline strongly arched from tip of snout to posterior 
base of soft dorsal; ventral outline comparatively straight from tip of mandible to origin of anal; vent 
immediately in front of origin of anal; caudal peduncle deep and compressed; head rather large; 
mouth large, slightly oblique, jaws equal, maxillary reaching posterior edge of pupil; eye rather small, 
slightly above axis of body; int.erorbital space narrow, little convex; opercular and preorbital bones 
entire; a band of small villiform teeth in each jaw, and on vomer and palatines; fins moderate, origin 
of spinous dorsal nearer base of last soft ray than tip of snout; first dorsal spine very short, second 
about half length of third, which is equal to eye and snout; base of soft dorsal equal to depth of 
caudal peduncle; longest dorsal rays 2.25 in head; caudal rounded, its length 1.75 in head; origin of 
anal slightly posterior to that of soft dorsal, its longest rays 2.4 in head; pectoral slender, reaching 
past origin of anal, its length 1.5 in head; ventrals short, barely reaching origin of anal, their length 
nearly 2 in head; scales large, weakly ctenoid, firm, and somewhat deeper than long; lateral line 
strongly developed, following outline of back until under last dorsal ray, where it curves downward, 
following middle line of caudal peduncle to base of caudal fin. 
Color in alcohol, head and bod} 7 rather dark brownish, a lighter crossband around body at nape 
and across opercles; another light band surrounding body between the 2 dorsal fins; 3 dark-brown 
lines radiating from the eye, the first downward across cheek to tip of maxillary, the second backward 
across cheek toward base of pectoral, the third upward and backward to origin of lateral line, spinous 
dorsal blackish, especially on last spine; soft dorsal, anal, and caudal dusky, narrowly edged with 
white; pectoral pale, crossed by about 6 obscure brownish crossbars; ventrals black or very dark 
brown, the outer rays somewhat paler. 
The above description is based upon the type, No. 50639, U. S. N. M. (field No. 20), a specimen 
1.5 inches long, obtained from the coral rocks in front of Waikiki, near Honolulu, August 22, 1901. 
This species is related to M. alulus of the coast of Florida, from which it differs markedly in color 
and in the more slender body. Only one specimen was obtained by us. Other specimens were 
obtained by the Albatross at Stations 3872 and 3876, between Maui and Lanai, in 28 to 43 fathoms. 
Apogonichthys waikiki Jordan & Evermann, Bull. U. S. Fish Comm., XXII, 1902 (Apr. 11, 1903), 179, Waikiki, Oahu Island; 
Snyder, op. cit. (Jan. 19, 1904), 526 (Hawaiian Islands). 
Genus 120. FOA Jordan & Evermann, new genus. 
Foa Jordan & Evermann, new genus (Fouicria brachy grammus) . 
This genus differs from Anna only in the character of the lateral line, which is developed only 
on the anterior part of the body. The preopercle, as in Mionorus, is without serration. 
Several species occur in crevices of coral rock in the South Seas. All of them are of very small 
size and some are brightly colored, several of them with a conspicuous black ear-spot. This genus 
differs from Apogonichthys in having palatine teeth. Fo is the Samoan name for fishes of this family. 
Fowleria Jordan A Evermann, Bull. U. S. Fish Comm., XXII, 1902 (Apr. 11, 1903), 180 ( avcitus ). 
Apogonichthys waikiki on plale. 
