THE FISHES OF PORTO RICO. 
327 
Color light-gray, thickly spotted with olive, giving it a granitic appearance, the rays of all the 
fins with narrow alternating olive and gray crossbars; some rays of vertical fins with short oblong 
spots extending in the direction of the raj'; blind side pale. 
A small -eyed Citharichtliys, in this respect related to C. spilopterus, but, except in small examples, 
bearing scarcely any other resemblance to that species. It differs from G. spilopterus mainly in the 
general heavier appearance, being everywhere broader and thicker, and in its color. There are two 
unnamed specimens in the National Museum from Santo Domingo referable to this species, otherwise 
known only from Porto Rico. This description is from a specimen, 162 mm. in total length (type 
The following table of relative measurements of these specimens is given for comparison: 
Comparative measurements of 10 cotypes of Citharichtliys arenaceus. 
No. 
Total 
length. 
Length 
to base of 
caudal. 
Head. 
Depth. 
Eye. 
Snout. 
Maxil- 
lary. 
Pecto- 
ral. 
Dorsal. 
Anal. 
Pores. 
1 
162* 
141 
3.8 
2 
6. 17 
5.3 
2.33 
1.5 
74 
54 
50 
2 
130 
110 
3.75 
2 
5. 8 
4.8 
2.41 
2.07 
68 
50 
54 
3 
114 
100 
3.84 
2.8 
5.2 
4.33 
2.6 
1.86 
69 
51 
45 
4 
94 
81 
4. 05 
2.14 
5 
5 
2.5 
2 
70 
50 
48 
5 
95 
82 
3. 86 
2. 1 
5.25 
4.66 
2.33 
2.1 
70 
53 
48 
C 
95 
81 
3.86 
2. 011 
5.25 
5.25 
2.62 
2.1 
75 
48 
50 
7 
88 
76 
4 
2.17 
4. 75 
4. 75 
2.7 
1.9 
74 
54 
50 
8 
84 
73 
3.94 
2.14 
5.3 
5.3 
2.5 
2. 05 
75 
53 
49 
9 
77 
65 
3.8 
2. 17 
4.86 
4.86 
2.43 
2.12 
72 
51 
48 
10 
59 
49 
3.8 
2. 33 
4.33 
4.33 
2. 6 
1.80 
72 
51 
48 
* The type. 
