526 MEMOIRS OF THE CARNEGIEJMUSEUM 



aa. Gill-openings small, narrow slits on the sides of the head; snout produced into a pendant reaching the origin 

 of the ventrals; scales well-developed. 



6. Both ventrals well-developed Achiropsis. 



66. Left ventral reduced to one or two minute rays near the anus; eyes rudimentary, the space between 



them about five times the diameter Apionichthys. 



666. Left ventral absent; eyes well-developed, the space between them about equal to the diameter. 



Soleonasus. 



Achirus Lacepede. 

 Achirus Lacepede, Hist. Nat. Poiss., IV, 1803, 659 (fasciatus, etc.). — Cuvier, 



Regne Animal, ed. 2, II, 1829, 343 (restricted to fasciatus, etc.). 

 Trinectes Rafinesque, Atlantic Journal and Friend of Knowledge, I, 1832, — 



(scabra) . 

 Grammichthys Kaup, Archiv fur Naturg., XXIV, 1858, 94 (lineatus and fasciatus; 



Achirus restricted to Pardachirus barbatus, etc.). 

 Monochirus Kaup, Archiv fiir Naturg., XXIV, 1858, 94 (maculipinnis) , not of 



Rafinesque, 1814, a genus of Soleina?. 

 ? Aseraggodes Kaup, Archiv fiir Naturg., XXIV, 1858, 103 {guttulata). 

 Baiostoma Bean, Proc. U. S. Nat. Mus., V, 1882, 413 (brachiale). 

 Barostoma Jordan and Gilbert, Synopsis Fishes N. Am., 1883, 965 (emended 



orthography) . 



Jaws equal; ventrals nearly equally developed, not continuous with the anal, 

 their origin remote from the chin; scales ctenoid, a margin about the blind side 

 of the head with profuse fringes; lateral line straight. 



359. Achirus lineatus (Linnaeus). 

 "Passer lineis tranversis notatus" Sloane, Jamaica, II, 1725, 277, pi. 246, fig. 2 



(Jamaica). 

 "Pleuronectes fuscus subrotundus glaber" Browne, Jamaica, 1756, 445 (Jamaica). 

 Pleuronectes lineatus Linnaeus, Syst. Nat., ed. 10, I, 1758, 268 (Jamaica), based on 



Browne and Sloane; not of ed. 12, which is Achirus fasciatus. 

 Monochir lineatus Quoy and Gaimard, Voy. Uranie et Physicienne, Zool., 1824, 238. 

 Achirus lineatus Valenciennes, in d'Orbigny, Voy. Am. Mer., V, ii, 1847, pi. 16, 



fig. 2.— Jordan and Goss, Ann. Rept. U. S. Fish Com. for 1886, 1889, 312.— 



Jordan and Evermann, Bull. U. S. Nat. Mus. No. 47, III, 1898, 2697 (Coary; 



Teffe; Tapajos; Porto Alegre; Pernambuco; Cannavierias; Manacapuru; 



Porto do Moz; Rio Grande do Sul; Rio Janeiro; San Matheo; Rosario; 



Itabapuana; Obidos; Xingu; Gurupa; Jutahy; Curacao; Para; Bahia; San- 



tarem; lea; Fonteboa; San Paolo; Rio Trombetas; Sambaia; Maues; 



