CALIFOHNIA ACADKMY OF SCIENCES 



Family BALISTIDiE. 



282. Balistes polylepis SliiiulacUner. 



Not iiiicommoii at Panania; three specimens were collected wliich agree very 

 wi'll witii Steiridachiier's description of the tyi)e and co-types from the west coast of 



Mexico. 



it may ho distinguished from B. carolinensis hy the smaller scales, deej)er 

 body, more elevated and convex interorbital, less sharply angiilated anal, and the 

 shorter caudal lobes. Our three si)ecimens of B. caroHntmis all have 24 anal rays, 

 wiiile B. po/i/kpis has 2o or 20; the lateral series of scales of carolinensis are 55 or 

 oC) in number, those of polylepis G9 to 73. B. carolinensis has the depth of the body 

 contained twice in the length, polylepis 1,,' to 1,! times; in carolinensis the caudal 

 lobes are somewhat longer, more slender and of erjual length, while in polylejns the 

 lower lobe is the shorter. 



Mcastirements in Hundredths of Length witliout Caudal. 



Lengtli without caudal, in mm 



Head 



Depth 



Orbit 



Snout 



Interorbital 



Length of pectoral 



Height of anterior part of soft dorsal. 



Height of anterior part of anal \ 



Length of middle caudal rays 



Dorsal rays 



Anal rays 



Scales, from upper part of gill-opening... 



211 



32 



59 



7 

 26 

 1 1 



i3i 

 27 



23 

 20 



in, 27 



25 



70 



283. Balistes naufragium Jordan d- Starks. 



The commonest Balistoid in Panama Bay; many specimens were taken about 

 the rocky islands. 



We have re-examined the type of the species, from Mazatlan, and correct 

 here a few slight errors in the original description: 



Dorsal III, 26; anal 24; scales 50. Head to lower end of gill-slit 2;: in body. 

 Snout Vg in head; eye 5^; longest dorsal ray Ig; longest anal ray IJ; pectoral 1|. 



