478 



(Id. linck l)i'i):i(i ;iii(l ll:i Itcncd. 



(I. Two supi'siljiicriil Kp'iiHifi on cjicli side. 

 Siipi'iiorhil ill .spine pi'OiSeiit. Abdoriicii 



kvcJcd 1 7VU7//ia 



(Id. ()ii(> sii|)rjiljii<'iiil spiiio on cju'h side. 

 SiH)r:v()rl)it,nl spine Fechly dov('lo|)('(I. 

 AI)(l<)iii(Mi ^cjirccly l\('(d(Ml K cii I iDcd jivo^ 



CAi'i{<)rY(j I A, K;inp. 



(■(I I" "P'.l'.IKi ^ Kjinp : Arcli. U\v Nal n ijj;., \\i., IHr);"), p. 220' 

 ( :\ccr(in(i II nisi ridhi , Kjni|)). 



( -aiapjice willi six ridges — a dorsal, an abdominal, two 

 siij)i-alat(M-al, and two iiii'ralaleral. Eacli lateral ridi^e with 

 a siiiolo large spine, wiiicli is bioad and Hal ; no sn j)ra,()rbital 

 spine. C-audal peduncle vvilli a coinpielc ring of scutes 

 posteriorly. Dorsal willi \'2 11, anal willi 12-1.'^ rays. 



( !ai'II«)I'Y(Ji A UN'is'i'iM ATA ((ilrav), Kanp. 

 IM. xvi. 



Accniiiii f ( 'd inoin/fiid ) iiii isl liiila ((Jray, iMSi.), Kaup : Ai'ch. 

 liir Nalui-.',., \.\i., bsrjf), p. 2"_M) ; (iiin tli(M- : "Cal. I^'isli. lirit. Mus., 

 viii., IH7'1), p. 2()(). 



I). 12-1 I ; A. l'3-i:r, IV 1 I II ; C. 10-11. 



Lenglli of head, I'l-oni the rostral cud of tlu' (•ai'aj)aoe 

 to {\\o gill opening, .'Vfj-o'C), dej)(h ol" body 1"1-1'3 in the 

 length ex(dusive of the caudal rays. Nari'owesl intei-orbital 

 widtli s(!arcely greater than the orbital diameter, which is 

 r.'> in (he snout; snout, measuicd I'rotn (he rostral end of the 

 carapace to the anterior orbital margin, I'lVl'l in the head. 

 liongesl jiecloral I'ay 1*07, dorsal I'.'i, anal IM), and caudal 

 \"A in the lu'ad. 



Back and l)elly eac^h with a compressed keel; lateral edges 

 elevated above the general surface of the cai'apace. Snout 

 but little produced, iu)t compressed. Forehead flat between 

 the eyes, the supraorbital margins moi-e oi- less elevated, and 

 unai'iiKMl. Supralat'Cral spine in the posterior portion of the 

 median lliiid of the carapace; it is flattened, with a broad 

 base, and is dircM-t-ed outwai-d and uj)ward. Infralateral 

 spin(« similar l)nt smaller, inserted below the origin of the 

 dorsal tin, ami directed outward, downward, and backward. 

 (Jillopening Ixdow the Irinder portion of the eye; pectoral 

 usniilly entirely behind the verticle of the eye, its anterior 

 ])ortion sometimes below the hinder orbital margin. 



Scutes ol' the carapace^ in close i'ontact everywhere except 

 before the gill-opening, where t-liey are slightly se])arated. 

 Their surfaces are i-ougheir on the head than on the body, and 

 those on lh(> throat are tubercular. Three or four scutes 

 are present, ix'hind tJu» dorsal and anal fins, and t'ihere is a. 



