184 REPORT OF NEW JERSEY STATE MUSEUM. 
pharyngeal enlarged, and fourth wanting or united to third. 
Stomach siphonal, without pyloric appendages. Air-vessel sim- 
ple, often wanting. Basis cranii simple. Sexes usually unlike, 
fins largest in males, but in some species females are much larger 
in size. Many are ovoviviparous, the young well developed at 
time of birth. In these species sexes are very unlike, the anal 
fin of male developed as an intromittent organ. Body covered 
with rather large cycloid scales, which are adherent and regularly 
arranged. Head scaly, at least above. Lateral line wanting or 
represented by a few imperfect pores. Dorsal fin single, inserted 
posteriorly, of soft rays only or rarely with a single spine or 
rudimentary spinous dorsal. No adipose fin. Caudal not forked. 
Pectorals inserted low. Ventrals abdominal, rarely wanting. 
Mostly fresh-water fishes of small size, though some occur in 
the arms of the sea in warm regions, and difficult of determina- 
tion. 
Key to the genera. 
a. FUNDULIN#. Teeth all pointed, none compressed, bicuspid or tricuspid. 
b. Teeth in villiform bands or in at least one or more series. 
c. Origin of dorsal before that of anal, radii 11 to 17. FUNDULUS 
cc. Origin of dorsal behind that of anal, radii 7 to I1. ZYCONECTES 
bb. Teeth uniserial; origin of dorsal before that of anal; mouth oblique. 
LUCANIA 
aa. CYPRINODONTIN®. Teeth incisor-like, notched, bicuspid or tricuspid. 
CYPRINODON 
Genus Funputus Lacépéde. 
The Killi Fishes. 
Key to the species. 
a.-Scales large, 31 to 38 in a lengthwise series. 
b. Female with 2 or 3 black horizontal stripes; male with about 12 
dark cross-bars and a dorsal ocellus; branchiostegals 6. MAJALIS 
bb. Females nearly plain; males with many pearly spots, and dorsal 
ocellus faint or wanting; branchiostegals 5. 
HETEROCLITUS MACROLEPIDOTUS 
aa. Scales small, 44 to 60 in lateral line. DIAPHANUS 
