Notes f? om San Diego Biological Laboratory. 127 



13. Trachurus picturatus (Bowdich.) Large specimens of 

 this species were taken from the stomachs of Sebastichthys 

 miniatus. 



14. Seriola dorsalis (Gill). Yellow tail. A number pro- 

 cured at one locality in fifteen fathoms. 



15. Serranus clathratus (Girard.) On sandy bottom near 

 San Clemente Island. 



16. Stereolepis gigas Ayres. Two individuals of about 

 300 pounds each, one at a depth of fifteen fathoms, the other of 

 twenty-three fathoms. These fishes are always found in company 

 with the "white fish" on which they. feed. 



17. Girella nigricans (Ayres.) Occasionally found in from 

 fifteen to twenty-five fathoms. 



18. *Ditrema orthonotus sp. nov. — A single specimen 

 much digested. . 18 m. to base of caudal; forty-five fathoms. 



We judge this species to belong to the genus Ditrema from its 

 single series of conical teeth and the size of the scales preserved 

 above the anal fin . An absolute identification cannot be made 

 from this specimen. 



This species seems to differ in the straightness of its back from 

 all others of the family known. 



D. X, 22; A. Ill, 29; head 4; depth above origin of anal about 

 three in the length. 



Greatly compressed, dorsal outline almost straight from tip of 

 snout to caudal; ventral outline greatly arched. 



Mouth small, very oblique, on an angle of 45 ; maxillary not 

 reaching front of orbit. Teeth \ ; those of the upper jaw 

 truly conical, those of the lower jaw truncate. Eye large, 

 3 in head, placed in the middle third; interorbital little convex. 

 Gill rakers about 4 in the eye. Highest dorsal spine 2 

 in the head, the highest ray but little longer. Caudal deeply 

 forked. Anal spines graduated, the third \% in eye. Ventrals? 

 Pectorals reaching to near vent. 



A large area above anal silvery; color elsewhere obliterated. 

 This species is closely related to and may be identical with D. 

 atripes J. and G. It differs from it especially in the slightly 

 convex interorbital and the higher premaxillary. 



19. Trochocopus pulcher (Ayres.) Fat head. — This is one 

 of the most abundant of the food fishes. It is always found in 

 shallow water and on rocky bottom. 



20. Pseudojulis modestus (Girard,) Seiiorita. Ranging 

 from the surface to forty- five fathoms. Several from the stom- 

 achs of rock fish. 



21. Caulolatilus princeps (J enyns) White fish. Important 

 food fish. This species goes in schools, though single individuals 

 are occasionally caught. Some of the specimens with empty 

 ovaries, others with ripe eggs. 



22. *Sebastodes paucispinis (Ayers.) This is one of the 

 most abundant of the rock fishes, and on account of its large 

 size is an important food fish. As is the case with the other 



