122 PROCEEDINGS OF THE NATIONAL MUSEUM. 



one inodenitc in size, inclined somewhat upward, not preceded by a 

 ridge; the lower one is long and sharp, pointing straight backward 

 and preceded by a sharp, naked ridge, which runs nearly across the 

 whole length of opercle. Eight gill rakers developed on anterior 

 limb of arch, the longest one-third the k)ng diameter of eye. 



Scales ctenoid, though not roughl3^ Lateral line anteriorly raised 

 in a low ridge. Head with scales to tip of snout; preorbital, inter- 

 orbital, suborbital regions and nape with line, crowded, irregular 

 scales; scales more regular and larger on cheek and opercle; inter- 

 opercle and maxillary with scales; l)ranchiostegal region and mandible 

 naked; the latter with a great many pores scattered ii-regularly over 

 it; opercle with a naked flap above; upper opercle spine. Fins naked. 



Pectoral scarcely reaching front of anal (slightly past in cotype); it 

 has 13 branched rays and 8 simple ones; the fourth or fifth ray from 

 the uppermost the longest. Ventrals rather wide apart, not reaching 

 to vent. Dorsal and anal spines each with a channel along its side, 

 reaching its entire length. Third dorsal spine the longest, 3^ in entire 

 length without caudal; the first scarcely half as long, equal to the 

 thirteenth; the twelfth three-fifths eye. Longest dorsal rays 2it in 

 head. Second anal spine much stronger and longer than third, '2^ in 

 head; the first If in second. Caudal truncate. Peritoneum white. 

 Color, light below, mottled with fine lines and spots on sides and l)ack. 

 Pectoral dark, the color solid above, Avith white spots below. Anal 

 with white spots on a dusky ground. Soft dorsal and anal rays crossed 

 with dark lines. Spinous dorsal mottled. This species is known to 

 us from two fine specimens, the one from Chosu, in Shimosa, the other 

 from Misaki. From the first the drawing is taken. The species is 

 known locally as Kasago. 



The type is from Misaki. It is IT cm. in length and is numbered 

 7367. Ichthyological collections, Leland Stanford Junior University 

 Museum. The cotype from Chosu is numbered 50900 in the United 

 States National Museum. 



(fVrar<g'z?, in array, from the rank of spines.) 



5. THYSANICHTHYS Jordan and Starks. 

 Tliysanichthj/x Jokdan and Starks, new genua {crofisotui^) . 



This genus differs from Sr^Jxistodcs chieflv in having dermal filaments 

 on head and along lateral line; no enlarged spine on edge of preopercle 

 or ridge on opercle. It has teeth on the palatines; 13 dorsal spines; 

 well-developed spines on top of head, along suborbitals, and edge of 

 preopercle. 



Species of small size and bright colors. 



{Ovffdvog^ a fringe; ixf^v^^ fish.) 



