Ko.12.3. LAXCELETS, etc., FROM JAPAN-JOIWAX AX D SXYDER. 729 



2. EPTATRETUS Dunneril. 



Epiatren.s (Dumeril) CunnKT, Dirt. Sri. Nat. XV. ISU), p. 134 {<h>v,beii Dumeril, 



not Lac^pede). 

 Homea Fleming, Philos. Zool., II, 1822, p. 374 {banks,). 



Les Heptat^'h.rs Doieril, Cuvier Regne Anim., 2d ed., II, 1829, p. 405 iarrhatm) 

 Heptatreme. (Dumeril) M'MrRTRiE, Anim. Kingdom, II, 1831, p. 29S {nrrhatm). 

 Heptatrema XoiOT, Das Thierreich, II, 1832, p. 529 {cirrhatus). 

 Bdeimoma MI^ller, Abb. Ak. Wiss., Berlin, 1834 {he.rairema) 

 Hrptafrem,'.^GmFFvm, Animal Kingdom, X, 1834, p. 621 (orrhatu.). 



This o-enus includes those E}>tatret>d<x which hare six to eight gill 

 opening" , thus differing from the West American genus. Polutotrema, 

 which has from ten to twelve. 



2. EPTATRETUS BURGERI (Girard). 



NUTAUNAGI OK SLIME-EEL. 



(Plate XXX.) 



Heptmiema cirrhatum Schlegel, Fauna Japonica, Poiss., 1847, p. 310, pL cxliii, 



Na-a^aki (not Petromyzon cirrhdus Forster, from Soutb Afru-a). 

 BdelkJoma eirrhatian Ishikawa, Cat., 1897, p. 63, Coast of Musasbi (off Tokyo . 

 B.Mloston>a hurgM Girard, Proc. Ac. Nat. Sei. Phil., 1854, p. 199, after Scldegel. 



Snout 6 to 6f in distance to first gill opening; gill area, with six 

 openinos, somewhat longer than snout; last gill opening on the left 

 side do'uble the size of the others; eye well developed; head, to gill 

 opening, 3^ to 3| in length of body: barbels, eight, the outer buccal 

 b'lrbels^lono-est 2 to 2| in snout: inner short and thick; nasal 1)arbels 

 lono- much'longer than la])rum, the lower longest; teeth in upper row 

 about 11 in number; tip of snout or labrum very broadly rounded: 

 its width oreater than length of upper barbel; dorsal and anal hns 

 spreadino-'widelv on the tail; greatest breadth of tail with hns one 

 and one-half times length of snout; tail, from vent. 2i in head, from 



gill opening. , . , i ^ 



Color purplish or plum color, the belly a little dorsal, and anal 



darker, conspieuouslv edged with pale; a pale ridge about middle line 



of Lack: l>arbels pale; row of slime pores distinct along whole length 



of l)odv. ^^ , ., J 



Coasts of Japa.i, from Tokvo southward, not rare. Here described 

 from three large examples, the largest ISi inches long, from Sagami 

 Bav (off Misaki and off Enoshima). and from one about a foot in 

 leiio-th from Wakanoura. In all these the number of gill openings is 

 six'^on each side. The specimen from Waktuioura has the snout very 

 much shorter than either of the others, the outer buccal barbel 

 reaching within half its length of the eye, almost a whole length short 

 in the oUiers. No other important differences appear, and probably 

 thi. i^ within the range of individual variation. It is barely probable 



