132 BULLETIN OF THE BUREAU OF FISHERIES. 
Body long and slender, head long; mouth large, terminal, jaws even, maxillary extending to 
below anterior margin of eye, no barbel; eye in anterior half of head; scales small, lateral line nearly 
straight; dorsal inserted behind ventrals, which are behind middle of body; pectorals extending half 
way to ventrals. 
The following are the extremes of measurements: 
Head Si eet eee cones eee anes. |e ONE eee eae (052820:31 .\Snotitectes 2 Seether ee 0.09 -0.11 
Depths ce ee eee ee en ee eee eee 0.18-0.22 | Depth of caudal peduncle. -- 0. 085-0. 10 
ByOssce2 sssceeee eee c ee s-« 2 ote pack Bee eee 0.05-0.07 | Length of caudal peduncle. - 0.18 -0. 22 
Anterorbital aspect eee ee aes ee eee 0. 07-0. 085 | 
The summary of head measurements indicates the relation between the size of the head and the 
length of the fish, though there is not enough variation in the size of the specimens to make the table 
of particular value. In specimens ranging from 80 to 150 mm. the size of the head apparently bears 
but little relation to the size of the fish. 
Number of specimens having the head— 
Length of fish. = = ——— - ————— 
0.28. | 0.285. | 0.29. | 0.295. | 0.30. | 0.305. | 0.31. 
Millimeters. | 
100-109. - 
110-119-- 
120-129. . 
130-139. . 3 = 
140-149... Sj) PA esebe asc esc’ cl fsasoseod bonosaas 
Measurements, however, vary inversely with the size of the fish, as is indicated by the following 
summary table of eye measurements: 
SS | 
Number of specimens having the eye— 
Length of fish. 7 
0.065. | 0.07. 
Millimeters. | | 
100-109 
110-119 
120-129 
130-139. . 
140-149... 
150-159... . 
The number of scales in the lateral lines of 77 specimens varies from 65 to 78, as follows: 
Specimens. | Specimens. 
GHG) CRS es tesadon oe OaCECE ed ue taonn Se spaarnbaseeasig 2 | 72 scales 9 
G6iscales\:2 a eeec see ene nee eae 3 | 73 scales 10 
Giiscales! sseeeeee ae eee eee See 3 | 74 scales 8 
68 seales - 9 | 75 seales 4 
G60'scalesti. 22.5 Seek Fae aca s eee ee coc see a= 5 | 76 scales 3 
TO}SC BIOS Rete ates ee ety ere eee tees 8 | 77 scales 2 
Tliscales?.< oc ce eee ten eee ee eo eee een 10:| ‘78iseales}<2s2...2525s8e25 so: esis See a eee 1 
The number of scales in an oblique row backward and downward from the origin of the dorsal to 
the lateral line is 13 or 14, and from the ventrals to the lateral line 6 or 7. The scales in the type of 
Ptychocheilus harfordi are 15-87-10. 
The dorsal fin in one of the 77 specimens has 10 rays, inthe others9. The anal is uniformly of 9 rays. 
The teeth of 21 specimens are 2, 54, 2; 2 specimens from Pollasky have the teeth 3, 4-4, 2. 
