58 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



"FAMILY VI. SCYLLIID^E. 



"(T/<e 



^liurks with two dorsal lins, without spines. the first above or be- 

 hind tin- ventrals. An.il I'm present, usually below the second dorsal; 

 caudal tin ratlin- long, with or without a basal lobe. Tail not keeled. 

 Spiracle- present No nictitating membrane. Last gill-opening above 

 tin- root ->f tin- pectorals. Mouth usually broad, with small teeth, sev- 

 eral series being in function. Teeth with a median cusp, and 1 to 4 

 .small ones on each side. Usually a distinct furrow at the angle of the 

 mouth. Nostrils near the mouth, sometimes confluent with it, some- 

 times provided with cirri. Oviparous. Coloration often variegated. 

 Th< ;scs quadrate, with prehensile tubes at the angles.* Sharks 



of the warm seas. Ceiiera 8 or 9 ; species about 30. 

 " (Scylli'Hl.i; Ciinther, viii, 400-414.) 



Nostrils confluent with the mouth ; caudal hent upwards, with hasal lobe, (fiin- 



"ti. Trrtli in Imlli jaws in maiiy scries, each willi a >i nuiLC median ensp, and one (ir 

 two smaller cusps on each side ; nasal cirri present ..... GlNGLYMosn >M.Y, 13. 

 " ** No>ti i!s not continent with the month; caudal not bent upwards. (.SC - '///IJH<I > .) 

 "fc. N'ostriK separated l>y an istlinins; no nasal cirri; tail not sorratc<l. 



SCYLLIUM, 13 (fc). 



'13.-GIIVCJL 1 YinOSTOIIA Miilln- \ lln.lo." (See pa-. 1^.) 



" 13 (6). SCYLL-IIIM Cuvi.-r. 



"(Cnvier K'I -in- Animal ed. 'J, l^x.".): typeScyllium <Mtulu8CllV.=8qualu8 /t7/(/m(}nu'l.) 

 liody rather stout. Uead more or less short and broad, the snout 

 low and blunt. Mouth rather large. Teeth small, sharp, triciispid, in 

 about four rows. Labial fold small or obsolete. Nost rils not continent 

 with the month, Separated by a broad isthmus from each other, each 

 with a free llapand no cirrus. Spiracle moderate, close behind the 

 eye, l-'ir-t dorsal beginning over ventrals ; second dorsal nearh over 

 anal. Tail .slender, not much bent upwards. Spotted. Warmer parts 

 of the Atlantic and Pacific. As here understood, (list in-ui.slied from 

 ,SV;////o/-///"////.s r,lain\ ille. ls](; (\. rniiiriiliin L.), by the separate nasal 

 \.il\i--. < Ucoy, a shark from ,;/'././.;, to tear.) 



II. .id \ir\ l.i.'.id and depiv c,l, l.roader lliau lon^. ( ('< ^Juilom-i/llium \ ( Jill.) 



In ii<i>r;<i,,nti<i.i il. are without leu tades and spirally twisted. Except 



tlii- >'< -'iHii'ln and Hettrodontido), oiii- sliai Us aii- all o\ o\ i\'i]iaroiis. 



t <Jill. Ann. I . Ili-i. N. VI-. I II'. 1 : t \ jie S.-iillhtm lutti-ifix I )nm.'ril. (i:c^a^jf t 



Sc\ Ilium, i 



