276 THE GENERA OF FISHES, PART II 



Agassichthys Newberry, 3; orthotype Placothorax agassizi Meyer (fossil). A 



synonym of Macropetalichthys Ag. 

 Machaeracanthus Newberry, 6; orthotype M. peracutus Newberry (fossil). 

 Onychodus Newberry, 7; orthotype O. sigmoides Newberry (fossil). 



586. NEWBERRY (1857). Letter Changing the Genus Mekolepis to Eurylepis, 



the Former Being Preoccupied. Proc. Acad. Nat. Sci. Phila., IX. 

 John Strong Newberry. 

 Eurylepis Newberry, 150; orthotype Mecolepis granulatus Newberry (fossil). 

 Substitute for Mecolepis Newberry, preoccupied. 



587. PETERS (1857). Neue Ckromidengattung (Hemichromis). Monatsber. Akad. 



Wiss. Berlin. 

 WiLHELM Carl Hartvvig Peters. 

 Hemichromis Peters, 403 ; orthotype H. fasciatus Peters. 



588. PHILIPPI (1857). Ueber einige chilenische Vogel tmd Fische, etc. Arch. 



Naturgesch. 

 Rudolph Amandus Philippi (b. 1808). 



Genypterus Philippi, 268 ; orthotype G. nigricans Philippi. 



Thysanochilus Philippi, 268; orthotype T. valdivianus Philippi. A synonym of 

 Velasia Gray, suppressed (but printed) by Troschel, editor of the Archiv. 

 Not Thysanocheilus Kner, 1865. 



Rhynchobatis Philippi, 270; orthotype a ray from Juan Fernandez, not given a spe- 

 cific name, only the dried head with long, flat snout preserved. Name preoccu- 

 pied as Rhynchobatus. This animal is described as a ray with a long, thin, 

 flat snout, rounded at the tip apparently like that of the shark, Mitsuku- 

 RiNA. Its surface below, except at the smooth base, is covered by small stel- 

 late prickles, curved backward at tip. Larger spinules cover the head with 

 six still larger ones forming a curve around the eye. As this form, obvi- 

 ously distinct, is without a name, it has been called Tarsistes philippi 

 Jordan. 



589. RICHARDSON (1857). On Siphonognathus, a New Genus of Fistularidce. 



Proc. Zool. Soc. London. 

 John Richardson. 

 Siphonognathus Richardson. 237 ; orthotype S. argyrophanes Rich. 



590. RUTIMEYER (1857). (Encheiziphius.) Verh. Ges. Basel, I. 



Carl Ludwig Rutimeyer. 

 Encheiziphius Riitimeyer, I, 561; orthotype E. teretirostris Riitimeyer (fossil). 

 A synonym or fossil homologue of Istiophorus. 



591. TROSCHEL (1857). Beobachtungen Uber die Fische in den Eisennieren des 

 Saarbriicker Steinkohlgebirges. Verh. Naturh. Ver. Preuss. Rheinl. Westphal. 



Franz Hermann Troschel. 

 Rhabdolepis Troschel, 15; logotype Pal^eoniscum macropterum Bronn (fossil). 

 A synonym of Elonichthys Giebel. 



592. 'WAGNER (1857). Characteristik neucr Arten von KnorpelHscheti aus den 



lithographischen Schiefern der Umgegend von Solenhofen. Gelehrte Anz. 

 Bayer. Akad. Wiss., XLIV. 



JoHANN Andreas Wagner. 

 Palaeoscyllium Wagner, XLIV, 291; othotype P. formosum Wagner (fossil). 



