460 CALIFORNIA ACADEMY OF SCIENCES. 88 



Pectoral reaching to vent: ventrals reaching half way 

 to second anal ray; second anal spine a little longer and 

 stronger than third; upper lobe of caudal the longer, 

 about equal to head. 



Color as in Lythrulon ftaviguttatum, in spirits, dark 

 steel gray; a small very distinct pale spot on each scale 

 of back and sides, surrounded by darker. This spot is, 

 in spirits, light yellowish: in life of a pearly blue. Head 

 plain; a small dusky blotch under angle of preopercle. 

 Fins plain bright yellow in life. Young with a large black 

 blotch at base of caudal, as in Hce?nulon steindachneri 

 and Ortlwstcechus maculicauda, and without the dusky 

 horizontal streaks seen in most of the other species. 



This species differs from Lythrulon Jiaviguttatuni in 

 having fewer gill-rakers, the depth and arch of the back 

 greater. 



Described from a specimen (No. 2963, L. S. Jr. Univ. 

 Mus.) 9 inches long. Two others were obtained. 



135. Orthostcechus maculicauda Gill. 



This small species was not found at Mazatlan either by 

 Dr. Gilbert or by the Hopkins expedition. Specimens 

 from Mazatlan and from Acapulco have been recorded 

 bv Steindachner. It was obtained by Xantus at Cape San 

 Lucas and Colima, and bv Dr. Gilbert at La Paz and 

 Panama. 



136. Anisotremus interruptus (Gill). Mojarron. 

 This large species occurs in great abundance about 



the islands near Mazatlan, many specimens, the largest 

 over two feet in length, having been obtained by dynamite. 

 It is occasionally seen in the Astillero. It is widely dis- 

 tributed along the coast, and specimens were obtained by 

 Dr. Gilbert in 1881 at Mazatlan. 



Bod}' grayish anteriorly, most specimens gray before, 



