24 CONTRIIU'TIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



anal, and of tin- lower caudal loin- black", (Giinthrr.) Tropical .seas; a 

 stra\ specimen taken at Wood's Hole, Mass. 



( nn -Inn-ill* , i'rinoilt'it i liinlmtiiH M. A II.. I'.i : t 'nrdttirinx limlmtux Giinther, viii, 157:$.) 



20.-APKIONODON (Jill. \*>\. 



^inaatli-tootlicd Sharks. 

 AIH-IOII MiilltT A Hriilr, ] in-occupied.) 

 .(iill, Ann. l.yc. Nat. JFist. N. V. vii. Ill : type SqvtUlU punctattu Mitch.) 



Snout more or less produced and conic: teeth entire, without serrie 

 or basal cusps, all of them narro\\ed on a broad base, the lower erect, 

 the upper cm-; or only slightly oblique; dorsal more or less posterior, 



opposite the space between pectorals and ventrals. (a, privative: -^t'w,, 

 saw : <"",, tooth : the edjjes of the teeth being always entire.) 



. A. IMIOK'tatllh (Mitcli.) (Jill. Siniiiitli-liMithal Shark. 



Distance of the extremity of the snout from the. mouth equals that 

 between the nostrils. Pectoral fin subfalciform. extending to the end 

 of the dorsal. Second dorsal much smaller than the first." (G tint her.) 

 Atlantic; probably not common on our coast. 



^limlni iiinirldtHK Mil. Lii. A I'liil. Trans. X. V. i. -1H: 1 , : < \in-liariafi ixodon M. .V H. 

 :W: Carc/iaruw puTJctoi/ Gtinther, viii, :ir>l.) 



21.- Si'OtlOBOIV Miill.T & Ilenlo, is;??. 



Oblique-toothed Hlutrkx. 



i.Miilli-r A llc-iil<-. \Virin; inn's Archiv 1'. Xaturji. iii : type Sculimloii lutirdiidim M. 

 A II 



Sharks with the teeth entire, oblique and flat, the points directed 

 toward the sides of the mouth, .so that the inner margins are nearly 

 hori/.ontal. and present a smooth cnttinu'ed^e. those in front more nearly 

 erect ; teeth not swollen at the base; each of them with a deep notch 

 on the outer margin below the sharp point ; no spiracles: a pit at base 

 ol tail: first dorsal well in front of ventrals, much larger than second. 

 ./ "-. t\\i>ted or crooked; ddibv, tooth.) 



:iO. s. 'rr:r itv;r (Richardson) Gill. 5/mrp-noed <Sftarfc. 



I'.od\ slender: snout <!<'] tressed, niodcraf el y rounded ; month U-shaped, 

 with a short labial -ioo\eat its anyle, which ^roox'e extends on the 

 upper jau a \\ell as on the lower; distance between nost rils greater 

 than distance from nost rils to end of snout : .uill openings narrow; first 

 doi'sal moderate, midway bet\\ecn jx-ctorals and ventrals; second dorsal 

 vei\ >mall. sli-htl\ behind, and rather smaller than the anal; anal (in 

 much shorter than distance from anal to ventrals: a slight furrow along' 



