868 Bulletin 4y, United States National Museum. 



Tliijnnus rochcamtf, Risso, Eur. M6rid., in, 417, 1827, Nice. 



Aiixis vulgaris, CuviER & Valenciennes, Hist. Nat. Poiss., vui, lliO, 18:il, Mediterranean. 



Atixis la2)einosoma, Uleeker, Fauna Japan, 408, 1854, Japan. 



Auxis thynnoiilis, Bleeker, Ternato, v, 301, 1855, Ternate. 



Anxisrochei, Guntiier, Cat., ii, 3G9, ISOO. 



Auxis thaMTil, Jordan & Gilbert, Synopsis, 425, 1883. 



390. GYMNOSARDA, (;ill. 

 (Little Tunnies.) 



Gijiiinomrda, Gn,L, Troc. Ac. Nat. Sci. I'liila., 18G2, 125, {uiiicolor). 



Tlii/nnnn, Lutken, Spolia Atlantica, 460, 1880, (iielami/s); not of Cuvier & Valenciennes. 



Tliijnnkhthijs, GiQLioLi, Catal. Pesci Italiana, 25, 1880, (ttmmiina, not Tliynnickthi/s of Bleeker, a 



genus of Ci/prinid-e) . 

 Enlhyiinus, Lutken, MS. (in Epist. Feb. 1881); Jordan & Gilbert, Synopsis, 429, 1883, (//iiuiHrna). 



This genus according to Liitkeu ' differs from Thimniisi (1) in the 

 absence of teeth on vomer; (2) by the complete absence of scales outside 

 of the corselet, -while in Tlitoniuti of the same size the skin is covered with 

 small scales ; the limits of the corselet in the Tunny and Albicore are 

 obscure, so that it can not properly be said that they have distinct corse- 

 lets; and (3) by an important osteological character, namely the peculiar 

 development, in the form of a network or trellis, of a portion of the 

 abdominal part of the backbone, between the vertebrie proper and the 

 ha?mapophyses. Vertebr;e 38. Species of smaller size than the Tunnies, 

 also pelagic, and of little value as food, {yv/xvo^, naked ; Giifj6a, a kind of 

 tunny caught about Sardinia; Sarda.) 



a. Lateral line with a decided curve below second dursal ; 4 lengthwise stripes on sides of body 



below lateral line. pelamis, 1255. 



aa. Lateral line without distinct curve; no stripes below lateral line. .alleterata, 1256. 



1255. GYMNOSARDA PELAMIS (Linnwus). 



(Oceanic Bonito.) 



Head 3i ; depth 4. D. XV-12-VIII ; A. II, 12-VII. Body oblong, robust. 

 Lateral line making a decided curve immediately beneath the second dor- 

 sal. Corselet strongly developed, covering the entire space between the 

 diagonals connecting the posterior extremity of the spinous dorsal and 

 the base of the pectorals. Posterior margin of preopercle about IV in 

 inferior margin. Pectorals reach vertical from tenth dorsal s^nne. Back 

 bluish; belly silvery ; 4 brownish, stripes on each side of belly, parallel 

 with the lower curve of body; no spots below pectorals. Warm seas; 

 pelagic; not very common; north to Cape Cod and Bermudas on the 

 Atlantic Coast of America, once recorded from California. t {nijlafiiq, 

 tunny.) (En.) 



* Spolia Atlantica, 596, 1880. 



t We follow Dresslar and Fesler in uniting FMhijnnns and Gijmnosarda, hecaxiss the external 

 characters of Enthiinnns are all shown by Ciimiidsmda inula, the Asiatic type of the latter genus, 

 Gijnmosardu. Probably the skeletons are also similar. 



X See Eigeumann, Pioe. Cal. Ac. Sci., in, 1889, 8. 



