1020 Bulletin 47, United States National Museum. 



The following are the numbers of the vertebrae in species of Percidceas 

 given by Jordan & Eigenmann and by Boulenger: 



Perca fluviatilis 22 + 19=41 



Perca flavescens 22 + 19 = 41 



Lucioperca volgensis 22 + 21 = 43 



Lucioperca sandra 25 + 21 = 46 



Stizostedion vitreum 25 + 21 =46 



Zingel asper 20 + 24 = 44 



Zingel zingel 22 + 26 = 46 



Percarina demidoffii 14 + 19=33 



Acerina cernua 15 + 19 = 34 



Percina caprodes 23 + 21 = 44 



Hadropterus aspro 19 + 23 = 42 



Hadropterus evides 18 + 22 = 40 



Hadropterus phoxocephalus_ 19 + 20 = 39 



Hadropterus scierus 18 + 22 = 40 



Etheostoma zonale 16 + 23 = 39 



Etheostoma maculatum 15 + 24 = 39 



Boleichthys fusiformis 16 + 20 = 36 



Etheostoma variatum 15 + 21 = 30 



Etheostoma lepidum 16 + 19 = 35 



Etheostoma whipplii 15 + 21 = 36 



Etheostoma flabellare 13 + 20 = 33 



Microperca punctulata 14 + 16 = SO 



Cottogaster copelandi 18+ 20 = 38 



Boleosoma camurum 17 + 21 = 38 



Boleosoma nigrum 15 + 22 = 37 



Ulocentra simotera 15 + 23 = 38 



Diplesion blennioides 19 + 23 = 42 



Ammocrypta pellucida 23 + 21 = 44 



Ammocrypta vivax 21 + 20 = 41 



463. STIZOSTEDION,* Rafinesque. 

 (AMERICAN PIKE PERCHES.) 



Stteosledion, RAFINESQUE, Ichth. Ohiensis, 23, 1820, (sdmonea). 

 Pomacampsis, RAFINESQUE, Ichth. Ohiensis, 23, 1820, (nigropunctata; mythical). 

 Oynoperca, GILL & JORDAN, Bull. U. S. Nat. Mus., x, 44, 1877, (canadense). 

 Stizosledium or Slizostethium, amended spelling. 



Body elongate, fusiform, the back broad. Head subconical, long. 

 Cheeks, opercles, and top of the head more or less scaly. Mouth large, 

 the jaws about equal; premaxillaries protractile, little movable. Teeth 

 in villiform bands, the jaws and palatines with long, sharp canines. Gill 

 rakers slender, strong; gill membranes separate. Preopercle serrated, 

 the serrse below turned forward ; operele with 1 or more spines, termina- 

 tions of radiating striae. Dorsal fins well separated, the first with 12 to 

 15 spines, the second with 17 to 21 soft rays ; last dorsal spine not erectile, 

 bound down by membranes ; anal spines 2, slender, closely appressed to 

 the soft rays, which, are rather long, 11 to 14 in number. Ventral fins 

 well separated, the space between them equal to their base ; ventral spine 

 slender, closely appressed to the soft rays. Scales small, strongly ctenoid ; 

 lateral line continuous. Branchiostegals 7. Pseudobranchise well devel- 

 oped. Pyloric cceca 3 to 7. Two species, diifering considerably from each 



* The genus Stizostedion is closely related to the European genus Lucioperca, Cuvier (type Perca 

 lucwperca, L.). From Lucioperca, however, it differs sufficiently in the wide-set ventrals and in the 

 weak development of the anal and ventral spines, which are closely approximated to the soft rays. 

 The dorsals in Lucioperca are slightly connected. The name Lucioperca, according to Boulenger, 

 "should date from the first edition of the Regne Animal, 1817, when Cuvier (p. 295) does use the 

 Latin name [as well as the French plural ' Les Sandres''] ( 4 ce qui leur a fait donner le nom de 

 lucio-perca') although indirectly and without a capital." (Boulenger, Proc. Zool. Soc. Loud., 

 892, 411.) But, as Dr. Gill has shown, this i s too great a strain on the words of Cuvier, who 

 "simply stated a historical fact and did not formulate a nomenclatural proposition." In other 

 words, Cuvier states that the name Lucioperca was used by Gesner, but to the genus to which 

 Gesner's Lucioperca belongs he supplies only the French name "Les Sandres," and Lucioperca can 

 only date from its use by Fleming, Phil, of Zool., 394, 1822. Since that time, the names Sandat, 

 Cloquet, 1827; Sandrus, Stark, 1828, and Schilus, Krynicki, 1832, have been applied to the typo of 

 Lufioperca. See Boulenger, 1. c., and Gill, Proc. U. S. Nat. Mus., 1894, 123, for discussions of the 

 relationships and nomenclature of the Pike Perches. 



