354 APPENDIX. 



Page 91 : 



Jordan & Evermann divide the Exoccetidcs into four families : 

 Esocidm, Scomhresocidw, Hemiramphidce, and ExocxtidcB. 

 Page 93, read : 



HYPORHAMPHUS Gill, instead of Hemiramphus, which 

 contains H. halao, etc. 

 Our species is : 

 224. H. roberti (Cuv. & VaL). See Jordan & Evermann, pp. 



721, 722. 



Page 93, read: 



103. EXOCCETUS Linnsus, instead of Halocypselus. 

 The species is: 



227. E. volitans Linnaeus, instead of £. or iif. evolans, a later 

 name. See Jor. & Everm., part iv. 



Instead of 104. Exocoetus, read : 



104. EXONATJTES Jordan & Evermann ; with species : 



228. E. exsiliens (Miiller), 



229. E. rondeletii (C. & V.), 



230. E. viaciguerras (Jor. &Meek.), 



231. E. speculiger (C. & V.) and 



104 b. CYPSELURTJS Swainson, with species : 



232. C. beterurus (Rafinesque). 



233. C. furcatus (Le Sueur). 



234. C. gibbifrons (C. & V.). 



The original Exoccetus volitans was the species called Halocyp- 

 selus evolans. 



Page 98 : 



The species of Gasterosteus all seem to merge by degrees into 

 one, G. aculeatus (L.). 



Page 100, add: 



113. EIRTLANDIA Jordan & Evermann, for aa, with serrated 

 scales. 



248. M. gracilis (Giinther) is found with M. heryllina, in the 

 Potomac, and the latter may not be distinct. The name gracilis 

 is the older. 

 Page 103, read: 



Family LI. RACHyCENTRID.2E, instead of Elacatida:. 

 Also read : 



120. RACHYCENTRON Kaup. 



258. R. canadus (L.). 

 Page 104, read: 



260. Tetrapturus imperator (Bloch & Schneider). 



261. Istiophorua nigricans (Laodpfede). 



