FISHES OP THE FAMILY LOBICAEIID.E. 223 



2. Dorsal with I 10-13 rays. 



a. Supraoccipital entirely bordered posteriorly by a single scute. 

 D. I 10; length of base of dorsal equal to its distance from the 



caudal 2. A. undecimalis Stdr. 



D. I 11 ; length of base of dorsal greater than its distance from 



the caudal 3. A. etentaculatus Spix, 



b. Supraoccipital bordered posteriorly by a median scute and by 1 on each side. 

 a. Supraoccipital with strongly elevated median ridge. 



Interoperculum with a few very short spines 4. A. gibbiceps Kner. 



Interoperculum with 1.2-15 spines, the longest l\ times the diameter 



of eye 5. A. liluratus Kner. 



/3. Supraoccipital with low median ridge. 



Interoperculum not notably spinate 6. A. multiradiatus Hancock. 



Interoperculum with a few spines 7. A. punctatus Gthr. 



B. Occipital without distinct median ridge; snout broad, rounded; scutes mostly strongly 



carinate. 



1. Depth of body 4£ times in its length; interoperculum with 30 or more slender 



spines. 



Dorsal with I 7 rays 8. A. medians Kner. 



Dorsal with I 10 rays 9. A. gigas Blgr. 



2. Depth of body more than 4* times in its length ■ interoperculum with less than 



30 spines ; dorsal with I 7 rays. 

 Interoperculum with a few short spines ; base of dorsal a little longer 



than its distance from adipose fin 10. A. aspidolepis Gthr, 



Interoperculum with about 20 spines ; base of dorsal considerably 



longer than its distance from adipose fin ; 23-24 scutes in a 



longitudinal series 11. A. brackyurus Kner. 



Interoperculum with about 15 spines; base of dorsal equal to its 



distance from adipose fin ; 26-27 scutes in a longitudinal 



series 12. A. scaphirlnjnchus Kner. 



C. None of the scutes carinate ; dorsal with I 7-8 rays. 



1. Supraoccipital with low median ridge. 



Length of mandibular ramus 2\ times in the interorbital width; 



large round dark spots on head, body, and fins 13. A. oligospilus Gthr,. 



Length of mandibular ramus 2A times in the interorbital width ; 



body and fins with a few broad dark bands 14. A. vittatus Stdr. 



2. Supraoccipital without median ridge. 



a. Length of mandibular ramus less than interorbital width. 



Interorbital width If times in the length of head 15. A. bachi Blgr. 



vol. xvii.— part in. No. 5. — October, 1904. 2 h 



