382 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [40] 



37. PLAGIOSCION SQUAMOSISSIMUS. 



Scicena squamosissima Heckel, Annalen ties Wiener Museum, ii, 438, 1840. Reinhardt, 

 Videnskab. Medd. Naturhist. Forening Kjobenhavn, 108. 1854. Steindacbner, 

 Beitr. zur Kenntniss der Fisch-Fauna Sild-Auierica's, 1879, 3 (Amazon, Ori- 

 noco, Rio Negro). 



Pachyurw squamosissimus Giinther, Cat. Fisb. Brit. Mus., ii, 526, 1860 (copied). 



Diplolepis squamosissimus Steindacbner, Scisen. Brasil., 2, 1853 (Brazil). 



? Scicena rubella Schoniburgk, Naturalists' Library, Fisbes of Guiana, ii, 133, 1843 

 (Rivers of Guiana). (D. IX, 34; A. II, 6; anal spines presumably small.) 



Johnius cronvina Castelnau, Anim. Nouv. on Rares de l'Ain6r. du Sud, Poissons, 11, 

 plate v, bg. 1, about 1855 (Rio Crixas, Rio Araguay). 



Scicvna crourina Guntber, Cat. Fisb. Brit. Mus., ii, 287, 1860 (copied). 



Johnius amazonicus Castelnau, Anim. Nouv. on Rares de l'Am6r. du Sud, Poiss., 12, 

 plate iv, tig. 1, about 1855 (Amazon). 



Scicena amazonica Guntber, Cat. Fisb. Brit. Mus., ii, 284, 1860 (River Chapin, 

 Para> 



? Corvina monacantlta Cope,* Trans. Am. Pbil. Soc, 1866, 402 (near Parimaribo, Dutch 

 Guiana. 



? Scicena monacantha Jordan, Proc. U. S. Nat. Mus., 1886, 587 (name only). 



Habitat. — Eivers of Guiana and Brazil. 



We have examined specimens of this species from Obidos, Avary, 

 Eio Puty, Tajaparu, Iga, Coary, Rio Trombetas, and Lake Hyanuary 

 in Brazil. Our description is chiefly taken from 10807, M. C. Z., from 

 Obidos, and 10857 from Coary. 



We regard the Johnius amazonicus and Johnius crouviaa of Castel- 

 nau as identical, and we follow Dr. Steindachuer in placing both in 

 the synonymy of the earlier Sciwna squamosissima. of Heckel. We have 

 seen no specimens of this species from Guiana. It seems to us, how- 

 ever, that the scanty descriptions published of Scicvna rubella and Cor- 

 vina monacantha resemble this species more than any other, although it 

 is not impossible that both should be referred to Plagioscion surinamen- 

 sis. If the latter should be found to be the only species of the genus 

 in Guiana, it should stand as Plagioscion rubellus. 



83. PLAGIOSCION SURINAMENSIS. 



Pseudoscicena surinamensis Bleeker, Arch. Ncerl. Sci. Exact, et Nat., viii, 458, 1873 

 (Surinam). 



Scicena surinamensis Steindacbner, Fiscb-Fauna des Can en, 1880, 4 (Rio Canca). Jor- 

 dan, Proc. U. S. Nat. Mus., 1886, 587 (name only). 



Scicena magdalence Steindacbner, Zur Fiscb-Fanna des Magdalenen-Stromes, 6, 18T8 

 (Rio Magdalena). 



Scicena magdalena; Jordan, Proc. U. S. Nat. Mus., 1886, 5S7 (name only). 



Habitat. — Eivers of the northern part of South America. 



*The following is tbe substance of Professor Cope's description of Corvina mona- 

 cantha : 



First ventral ray produced as a filament which roaches past the vent ; pseudo- 

 brancbiaj none ; eyes 5 in bead ; depth equal to length of bead; preopercle sharply 

 serrate on its vertical margin ; pharyngeal patches of teeth small, tbe teeth bristly; 

 caudal fin sublanceolate ; pectorals as long as ventrals without filaments ; anal spine 

 short, single in typical specimens; color, silvery, grayish above ; no spots. D. X-L 

 33; A. I, 5. Scales 10-4'J-l 6. 



