362 PEOCEEDIXGS OF UXITED STATES NATIONAL MUSEUM. 



38. Diabasis maculicauda (Gill) Jor. & Gilb. 



{Orthostocchus maculicauda Gill, Proc. Ac. Nat. Sci. Pliila. 1802,2r>5=^ir(:cm!<?oH mazaf- 

 lanum Steiudacbuer, Iclithyol. Notiz, viii, 12, taf. vi, 1869.) 



6557. (Tyj)es of Orthostoechus maculicauda.) Several immature speci- 

 mens. 



39. Pomadasys inornatus (Gill) J. & G. 



(Microh'pidoivs inornatus Gill, Proc. Ac. Nat. Sci. Pliila, 1862, 256 = ? Pristipoma hreri- 

 innne Steiudacliner, Ichth. Notiz, viii, \S^9,\i) = ? Pristipoma notatum Peters, Berliu. 

 Monatsber. 1889,708.) 



3684:. (Types of Microlepidotus inornatus.) Two adult specimens, iu 

 good coudition, 8 inches long. 

 2999. One young example. 



6558. Numerous immature exami^les, from 1 to 4 inches long, showing 

 lengthwise stripes. 



7313. Four specimens, partly grown. 



All the specimens examined have 14 spines in the dorsal, and the 

 membranes of the soft dorsal and anal seem to be without scales. 



The young of this species is silvery, with three regular parallel black- 

 ish stripes, the lower from eye to middle of base of caudal, the next 

 from above eye to upper x)art of caudal pednncle, the third higher uj), 

 to middle of soft dorsal. The adults are nearly plain with traces of 

 about 6 narrow, dusky, wavy streaks, which do not follow the rows of 

 scales. 



The specimen from Guaymas (Xo. 29386), i-eferred to by us in a pre- 

 vious paper (Proc. U. S. Xat. Mus. 1881, 274) as Pomadasys inornatus, 

 belongs apparently to Pomadasys cantharinus (Jenyns) J. & G. 



40. Pomadasys ?bilineatus (Cuv. & Val.) J. & G. 



{Gcnytrcmus Intcrruptus Gill, Proc. Ac. Nat. Sci. Phila. 1832, 256 (young). 



30927. (Tyjjes of Genytremiis interruptus.) Nine young specimens, 3 to 4 

 inches in length. These young specimens resemble to a remarkable 

 degree the young of the Atlantic species, P. bilineatus, with which they 

 were comj^ared by Professor Gill. Compared with specimens of the 

 latter species they differ only in the larger size of the scales, above the 

 lateral line mesiallj\ In bilineatus there are usually 6 scales in a ver- 

 tical series between the spinous dorsal and the lateral line. In the types 

 of interruptus we find 4, 5, or 6 scales in such a series. In Pomadasys 

 fiirthi we find 4. Filrtlii differs from bilineatus, so far as we can see, 

 only in a slightly different color, more arched back, and rather larger 

 scales between the spinous dorsal and lateral line. We are unable at 

 present to decide whether the types of interruptus are the young of 

 fiirtM or of bilineatus. If the former, which is not unlikely, the occur- 

 rence of the latter species in the Pacific is yet to be verified, although 

 not improbable. All the definite records of bilineatus on the west coa.st 

 of tropical America refer to young specimens, with lateral stripes like 

 the types of bilineatus. 



