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BULLETIN OF THE BUREAU OF FISHERIES 
plus 12 or 13 behind. It is most easily confused with N. deliciosus stramineus (see 
comparison on p. 332), but the myomere count and position of the ventrals which 
are inserted about 4 myomeres before the dorsal origin in this species are sufficient 
differences to distinguish the two. 
Figure 41 . — Notropis atherinoides, 4.9 millimeters 
4.9-millimeter stage. — Total length, 4.9; length to vent, 3.3; length of head, 0.7; 
snout, 0.08; diameter of eye, 0.22; greatest depth before vent, 0.63; depth behind 
vent, 0.57 millimeter. Myomeres, 23 to vent plus 13 behind. Dorsal marginal fin 
fold originating about 12-13 myomeres behind head, narrow, pinching at peduncle 
and widening around lophocercal tail ; ventral marginal corresponding to dorsal con- 
tour; pectorals very small. Characterized by the exceedingly elongate colorless body, 
Figure 42 . — Notropis atherinoides, 6.1 millimeters 
colorless eyes, very elongate intestine, clear, elongate yolk which is granular in texture, 
and far inferior mouth. 
6.1 -millimeter stage. — Total length, 6.1; standard length, 5.9; length to vent, 
4.0; length of head, 0.9; snout, 0.15; diameter of eye, 0.32; greatest depth before vent, 
0.82; depth behind vent, 0.57 millimeter. Myomeres, 23 to vent plus 12 behind. 
Mouth small, terminal; marginal fins unchanged from preceding, but notochord 
turned slightly upward. 
Pigmentation. — The eye is pigmented with black, and about 9-10 very incon- 
spicuous chromatophores extend along underside of intestine at wide intervals and 
along ventral ridge behind vent. Pigment on dorsal aspect of intestine is confined 
to one rather large linear patch at vent. 
8.9-millimeter stage. — Total length, 8.9; standard length, 8.3; length to vent, 5.5; 
greatest depth, 1.0 ; diameter of eye, 0.4 millimeter. Myomeres, 22 to vent plus about 
14 behind. Snout somewhat longer and more pointed than in 6. 1 -millimeter specimen 
but still shorter than eye; short head assuming the conic aspect of N. atherinoides; 
