6 FOSSIL FISHES OF SOUTHERN CALIFORNIA 



ossified, the neural and haemal spines rather strong, short, directed back- 

 ward. The tail is not heterocercal. The fin rays cannot be exactly 

 counted.' The head is not well preserved in any specimen except for 

 the rather strong lower jaw and the small eye. Its surface bones are 

 enameled and smooth. Figure 20, entitled "A Clupeoid Fish, A," repre- 

 sents a specimen of ETRINGUS SCINTILLANS. Figures 18 and 19, labeled 

 doubtfully ETRINGUS SCINTILLANS, belong, however, to a different fish, 

 GANOLYTES CAMEO. 



I present here a restoration of the species by Mr. William S. Atkin- 

 son, and also a drawing of the tail vertebrae from a specimen in which 

 these are well preserved. The body vertebrae are deeper than long, 

 scarcely constricted, not hourglass-shaped. 



The species much resembles PHOLIDOPHORUS STRICKLANDI Agassiz, 

 as figured by Agassiz and by Woodward. This species, from the Lower 

 Lias of Leicester and Somerset, differs from the type of PHOLIDOPHORUS 

 in having but few of its scales arranged in oblique series. ETRINGUS 

 seems to differ from PHOLIDOPHORUS in the entire absence of this 

 arrangement and in the strictly homocercal tail. It belongs to a more 

 recent horizon than most of the other PHOLIDOPHORID.E. The genus has 

 also much in common with the LEPTOLEPID^ and it may really belong to 

 that family. 



Cotypes are numbers LXV, LXVI, LXXV, LXXVI, LXXVII, 

 LXXXIX, XCV, XCVI, XCIX, CI, CII, and CIV from Brown's Canon, 

 and LXXXIV from Soledad. 



Four other specimens (No. XCVII, XCVIII, C, and CIII) from 

 Brown's Canon differ in having the bones and scales entirely black, the 

 scales not lustrous. This distinction appears to be due to the fact 

 that these specimens lie in the surface where one stratum is separable 

 from another, the change perhaps due to infiltration of water. The 

 lustrous scales are from specimens hermetically sealed, within a stratum 

 of fine sandstone. 



The name ETRINGUS is from TJTQOV, abdomen, and iyY> short for 

 avQiyyo?, avQiyi, a tube, referring to the (fallacious) appearance of a 

 lateral line along the abdomen. 



2. Ganolytes cameo Jordan, new genus and species. 



(Plate II, fig. 3; Plate IV, figs. 1, 2) 



The specimens figured on page 123, figures 18 and 19, in my 

 "Fossil Fishes of California," as probably belonging to ETRINGUS SCIN- 

 TILLANS, certainly represent a different species, characterized by orna- 

 mental sculpture of the relatively thick and strongly enameled scales. 

 Of this fish, much larger than any specimen of ETRINGUS SCINTILLANS, 



