Q2. LEUCOSOMUS. 9—1 



hook ; the inner smaU and conical. Gill-rakers sborf «,r,.li r f . 



oSXl'li:"-"^'"'''-"''" """-- 1"- »l>P»«e'to tUe angle 

 Western North America. 



'''■ Section. '''" '"'""■ ^"^^^'^'^ ^^^-- ^-™ the Haslar 

 r. Adult. San Francisco. Presented by Dr. W. 0. Ayres. 



n. t^^er caudal lobe more devel^yed than tJw loiver. 



8. Leucosomus inasquilobus. 



Pogonichthys inaequilobus, Uaird ^ (iU-anl, Proc. Ac. Nat Sc Philad 

 18o4, p. 1.3(> ; L . a. ^. Pac. R. M. Exped Fish d ^Ir, ,! Wft% i i 

 (position of dorsal fin incon-ect) ^' ' ^ ' ^^- ^S'" ^'^ 



D.ll. A. 10 V. 10. L.lat.59. L. transv. 10/10. Vert. 26/15. 



7.,5? "-Pi"^'- ^«^^ «/ '^'^ caudal fin is considerahly loyu,er than the 



unao^ea. ine height of the body is nearly equal to thp Ipno-fi! 

 of the head, which is more than one-fifth of tl^^ toHwJf"^ 

 caudal). Head two-thirds as deep as lon^ "'Ip)!. r / ?T* 

 eve is onp fiffh r.e +;, i li. J^ f '»• ^'^^ diameter of the 



oi moaeiate width, the maxillary extend ng to the verticil f,-n^ +y,l 

 front margin of the orbit; uppe'r jaw overlapping the loweiPr^' 

 orbita longer than deep, larger than the postorbttal, whkh is Sr 

 than the other suborbital bones. The ori<nn of 4. ii 1 T ■ 



the lateral liiie and ventral fin. Coloration uniform 



Iharyngeal teeth strongly compressed, hooked. 5 or 4 2—2 5 



Gill-rakers moderately developed, acutely pointed, claw-like The 



attachment of the gill-membranes to the isthmus taLrpkce in 



advance of the angle of the pra^opercidum. ^ '^ '"^ 



California. 



"'^^O^ULl^'"'^""'^"''^^- S^^ ^^^^^i«««- Presented by Dr. 

 '^' ^^^cT^' '' '^'^'*°°- '^'™ ^'■''''''''^- Presented by Dr. W. 0. 



LeuJlSci'^" it' itf ''"\ f «<^^tiaUy differ from that of European 

 1.CUC1SC . ihe last caudal vertebric ^rith their apophvses are rP 



