REVISION OF THE FISH FAMILY LIPARIDAE 57 



E^. Gill slit extending down in front of 3 to 5 pectoral rays. 



Ji. Disk usually more than 2 in the head in the adult; greatest 

 depth of the body usually behind the origin of the second 



dorsal; color brownish or striped mucosus. 



J2. Disk 2 or less in the head; color slaty or olive gray; body 



deepest at the origin of the dorsal micraspidophorus. 



C*. Dorsal unnotched, of if notched the gill slit extends down in front of 

 more than 6 pectoral rays. 



M'. Pectoral with not more than 35 rays, less than the 

 number of dorsal rays; gill slit in front of 10 or less 

 pectoral rays. 

 N^ Pectoral 29-32; gill slit extending down in front 



of 3-5 pectoral rays cyclopus. 



N2, Pectoral 34; gill slit in front of 9 pectoral rays 



frenatus. 

 M2. Pectoral 3S-43, with more rays than the dorsal; 



gill slit in front of 13-16 rays fucensis. 



B*. Caudel connected to the dorsal for more than one-fifth and less than three- 

 fourths its length, or if connected for three-fourths its length the 

 pectoral is unnotched; the number of pectoral raj^s greater than the 

 number of anal rays. 



O^ Pectoral notched in adult and young. 



P^ Gill slit extending down in front of not more 

 than 10 pectoral rays. 

 Q*. Gill slit extending down in front of 6 or 

 less pectoral rays; pyloric coeca less than 

 55. American. 

 R'. Dorsal 38-40; anal 32-35; prickles ap- 

 parently always present- _bristolense. 

 R2. Dorsal 41-44; prickles never present. 

 S'. Pyloric coeca 36-48; gill opening in 

 front of 3-6 pectroal rays_tunicatus. 

 S^. Pyloric coeca 18-20 (?); gill opening 

 in front of 0-3 J^ pectoral rays 

 herschelinus. 

 Q2. Gill slit extending down in front of_6-9 

 pectoral rays; coeca more^ than r 55; 



Asiatic agassizii. 



P^ Gill slit extending down in front of more 



than 10 pectoral rays; coeca less than 55. 



T^. Head blunt; width of head usually 



greater than the depth ; head and 



body resembling the tide-pool 



forms; snout to disk usually less 



than 7.5 in the|^length.^ Flesh 



not pinkish. 



U^ Dorsal 37-40; no prickles; dorsal 



frequently notched.'*; Coast of 



Washington and southeast 



Alaska dennyi. 



U^. Dorsal 40-44; no prickles. Ber- 

 ing Sea cyclostigma, gibbus. 



