8 



BtJLLETIN 150, UNITED STATES NATIONAL MUSEUM 



Head. — The head is typically blunt though sometimes distinctly 

 pointed as in Liparis rhodosoma. The snout is usually truncate, 

 rarely projecting as in Acantholiparis opercularis and Allinectes 

 ectenes. The lower jaw is typically included and the mouth horizon- 

 tal. In Paraliparis cephalus and Nectoliparis pelagicus the lower jaw 

 projects and the mouth is oblique. The projecting shovel-shaped 



e:} 



^tS^- '■ supra branchial pores rudimentary pores 



snout pores :-.' 



snout to disk 



■ notch 

 lower lobe of pectoral 



disk 



disk to vent 



dorsal to oaudal 



Tent to anal 



'•/ caudal r 



skln-oovered base of caudal 



center or base 



margin or flap 

 Figure 1.— Diagrams showing parts of fish 



snout of Acantholiparis opercularis suggests a mud-bottom environ- 

 ment. The species of Liparis typically have the width of the head 

 greater than the depth, the reverse being true of the majority of the 

 remaining species, in which the head is compressed and the cheeks 

 vertical. One species, Acantholiparis opercularis, has the opercular 

 arms projecting as spines from the sides of the head. The lower 



