72 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. J 



Directly below the posterior .spines the vertical fins are crowded. 

 The spinous dorsal and soft dorsal point nearly straight backward, the 

 caudal obliquely downward, and the anal straight downward. The ' 

 pectoral is inserted behind the opercle a distance equal to the diameter 

 of the eye and the postorbital part of the head; its posterior margin is 

 slightly concave; the extreme upper and lower rays are the longest, 

 the former a little longer than the latter. The ventrals are inserted 

 midway between a point below the anterior orbital rim and the base 

 of the posterior anal ray. They are in some individuals long (prob- ^ 

 ably a sexual variation) and are contained li in the depth of the body 

 above them; in others they are short, equal to or slightly exceeding 

 the diameter of the eye. The first dorsal spine is equal in length to 

 or slightly exceeds the distance of the pectoral from the edge of the 

 opercle. From the end of the process which bears it a tiny spine 

 projects downward and is connected to the dorsal spine by a membrane. 

 The fish is evidently able to lock the dorsal spine in a horizontal posi- 

 tion. When declined it projects downward at right angles to the 

 spine that bears it. The second and third dorsal spines are curved 

 slightly downward. The second reaches about three-fifths of the dis- 

 tance from its base to the base of the first. The tips of the dorsal 

 rays reach a very little past the tip of the second dorsal. The length 

 of the caudal rays are equal to the length of the dorsal rays. The 

 anal rays are shorter and are about equal to the length of the base of 



the fin. 



Color brown, lighter above; a dark streak running through the eye 

 appears as a double streak on opercles, thence takes an irregular 

 course to pectoral base, behind which it is continued along the naked 

 portion of the body below lateral plates, where it widens slightly at 

 each rib; behind it crosses the caudal vertebrse and ends between the 

 spinous and soft dorsals. 



Numerous specimens were obtained from Yaeyama, Ishigaki Island, 

 Riukiu, having been collected by Capt. Alan Owston. 



{drigatus, striped.) 



SUMMARY. 



Suborder HEMIBRANCHII. 



Family I. Gasterosteid.k. 



1. Gasteroftleus (Artedi) Linnanis. 



1. cataphract as (Pallas); Kushiro, Ibi River, Mino River. 



2. Pygosteus Brevoort. 



2. steindaclineri Jordan and Snyder; Yamashiro, Inokashiro, Aomori. 



3. undecimalis Jordan and Starks; Chitose, Hokkaido. 



