FERNHOLM and HUBBS: WESTERN ATLANTIC HAGFISHES OF THE GENUS EPTATRETUS 



Prebranchial length: from tip of snout to front 

 of anteriormost gill aperture. 



Branchial length: from front of anteriormost 

 gill aperture to front of pharyngo-cutaneous aper- 

 ture. 



Preocular length: from tip of snout to center of 

 clear area marking ocular region. 



Body width: maximum, with body molded into 

 seemingly natural conformation. 



Body depth: maximum overall, near middle of 

 body, including ventral fin fold (if applicable). 



Body depth excluding fin fold: same region as 

 in body depth, but excluding fin fold. 



Body depth over cloaca: over front of cloacal 

 slit. 



Tail depth: maximum, taken at right angle to 

 local axis, including fins. 



Length of each of the three barbels: from 

 crease at outer-anterior base. 



The following counts have been taken: 



Cusps on multicuspids (Figure 2): outer/inner 

 row of teeth on both sides. Usually the head is cut 

 open ventrally to count the teeth. 



Unicuspids, outer row (including smaller cusps). 



Unicuspids, inner row (including smaller 

 cusps). 



Total sum of all cusps. 



Prebranchial (tip of snout to front of anterior- 

 most gill aperture) slime pores (left side). 



Branchial slime pores (left side). 



Trunk slime pores (left side). 



Tail slime pores (left side). 



Figure 2.— Multicusps of Eptatretus springeri by scanning electron microscopy. A— right outer tooth row, B— right inner tooth row to 

 show pattern of fused teeth 3/2 ( see text) . Multicusps ofE. minor. C —right outer tooth row, D— right inner tooth row to show pattern 

 of fused teeth 3/3. Scale indicated in B is 2 mm for all figures. 



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