PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 421 



don with six species, as follows, the names under which they Avere 

 retained in the last systematic work on fishes — GUnther's Catalogue of 

 the Fishes in the British Museum being added: 



T. {Cheilichthys) testudineus, G. viii, 282. 

 T. {Gastrophysus) lagocephalus, G. viii, 273. 

 T. {Arothron) faJiaJia, G. viii, 290. 

 T. (Gastrophysus) ocellatus, G. viii, 279. 

 T. (Arothron) hispidus, G. viii, 297. 

 Orthagoriscus mola, G. viii, 317. 



No species having been signalized as the type of the genus, it remained 

 for succeeding uatumlists to restrict the names to a more definite grouj). 



Tbe T. mola was first removed as the type of the genus Mola by 

 Cuvier in 1798. 



The remaining species were left together till W. Swainson,* in 1839, 

 subdivided the genus, and named five sections distinguished by trivial 

 characters, but which, nevertheless, must be taken cognizance of. 



These were named and defined at p. 328 of v. 2 as follows : 



Tetraodon Linu. — Head short; the body being entirely covered with prickles. 



T. Ihieatus. Bloch, 141. t T. {Arothron) stellatus, G. viii, 294. 



testudineus. lb. 139. t T. (Arothron) reticularis, G. viii, 29G.t 



maculatus. Haiuilt. 18, fig. 2. T. {Chelonodon) imtoca, G. viii, 288. 

 fluviatilis. lb. pi. 30, fig. 1. T. {Arothron) fluviatilis, G. viii, 299. 



Leisomns Sw. — Head short ; the body entirely smooth. 

 T. Inwissimus. Sch.^ 



mnrmoratus. Haniilt. pi. 18, fig. 3. T. {Mnnotretns) cutcutia, G. viii, 290. 

 Lagocephalus Sw. — Head short; the upper parts of the body smooth ; the belly armed 

 with angnlated spines, as in Diodon. 



L. stellatus. Bl. pi. 143. T. {Gastrophysus) Honckenii, G. viii, 276. 



Fennantii. Yarrell, ii, 347. T. {Gastrophysus) laf/ocephalus, G. viii, 273. 



Cirrhisomus Sw. — Sides of the body fnrnished with cirriforni processes. 



C. Spcngleri. Bloch, pi. 144. T. {Cheilichthys) Spengleri, G. viii, 284. ' 



Psiloiotus Sw. — Fore part of the head and muzzle prolonged, narrow, as in Batistes ; 

 the back carinated; belly furnished with prickles. 



I', rostratus. BI. \A. 146. T. {Anosmius) rostratus, G. viii, 303. 



electricus. Ph. Tr. 76, pi. 3. T. {Anosmius) mnrgaritatus, G. viii, 300. 



It is necessary to add tbat the author, on a previous page (v. 2, p. 

 194), had defined the same groups in essentially the same manner, but 



* On the Natural History and Classification of Fishes, Amphibians, and Reptiles, by 

 William Sw'kinsou, v. 2, pp. 194,328. 



tNot identical but congeneric with T. lincatus, L., = T. (Arothron) fahaka, G. viii, 

 290. 



t Generically distinct from T. testudineus, L., = T. ( Cheilichthys) testudineus, G. viii, 282. 



§ There is no " T. hevissimus" in Bloch and Schneider's " Systema Ichthyologiie," and 

 Swainson has simply copied the name from Regne Animal of Cuvier, who, in his second 

 section of the genus Tetraodon, characterized by the entire body smooth, groups two 

 species: " T. herissimus, BL, Schn."; and " T. cutcutia, Bucliau, xiii, 3". The first 

 species is unidentifiable, unless it bo with the 2\ Iceviyatus, Bl., Schn. 



