236 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
GOBIIDrE. 
Philypnus dormitator (Lacepede). T. 
Rio San Juan, and seen in Yen to springs near Havana; very abundant in the San Juan, where 
specimens 46 to 256 mm. long were obtained; young with black stripe from tip of lower jaw to caudal. 
Dormitator maculatus (Bloch). T. 
Rio San Juan, at its mouth and at the first ford; very dark; lagoon at San Cristobal, very light. 
Eleotris pisonis (Gmelin). T. Rio San Juan, at its mouth and at the first ford. 
Lophog'obius cyprinoides (Pallas). M. Rio San Juan. 
Gobius soporator Cuv. & Val. M. Mouth of Rio San Juan at Matanzas and at its first ford. 
Gobius boleosoma Jordan & Gilbert. M. Mouth of Rio San Juan and at its first ford. 
Awaous taiasica (Lichtenstein). T. Sumidero. 
BROTULIDiE. 
Styg-icola dentatus (Poey). f* 
This blind fish was taken in the M cave near Alacranes, 20 specimens; Jaiguan, 5 specimens; 
Frias, 2 specimens; Modesta, 4 specimens; and Tranquilidad, 7 specimens; caves near Cafias without 
specific locality, 5 specimens. In all, 43 specimens were secured, ranging from 60 to 152 mm. long. 
Poey records this species from Cajio and Ashton, in which it was not found by us. Pie also records it 
from La Industria, which is said to be between Cajio and the Cafias caves. 
The males of Stygicola dentatus are distinctly larger than the females. Average length of the 20 
females caught is 97 + mm., the largest one 120 mm. The average size of the 23 males is 113 + mm., the 
largest one being 152 mm. long. The males were in excess of the females in the ratio of 100 females 
to 115 males. There is but an appreciable difference in the averages of the fins, as far as these could 
be counted, the average formula for the females being D. 91.4, A. 74; and for the males D. 91.1, A. 73.6; 
or the average for the two are I >. 91.2, A. 73.6. 
Lucifuga subterraneus Poey. t * 
This species was taken in all but one of the caves in which Stygicola dentatus was taken, and in 
several others besides. The localities are Ashton, 13 specimens; Los Banos, 5 specimens; Cajio, 3 speci- 
mens; Hawey, 16 specimens; San Isidro, 2 specimens; Jaiguan, 18 specimens; Las Frias, 5 specimens; 
Modesta, 2 specimens; Tranquilidad, 3 specimens; Cafias, without specific locality, 9 specimens; total, 
76 specimens, ranging from 24 to 94 mm. long. The females of Lucifuga subterraneus are distinctly 
larger than the males. In making the average for the size of the sexes individuals less than a year old 
were not considered, because the differences in the sexes would, if present, be but very slight, and 
because in such young the sex could not always be determined with certainty. An examination of all 
specimens makes it probable that at the end of a year after birth the young are about 50 mm. long. 
In obtaining the average size of the sexes only specimens over 50 mm. were considered. The males 
above this size measure 59.7 mm. on an average, with a maximum of 94 mm. The females measured 
71.1 mm. on an average, with a maximum of 93 mm. Of the specimens over 50 mm. long 23 were males 
and 22 females, or 100 females for every 104.5 males. The fin formula to the nearest decimal for those 
of the individuals over 50 mm. which would lie counted is, males, D. 82.1, A. 67.4; females, D. 81.9, 
A. 68. The average formula for those less than 50 mm. long is D. 83, A. 67.2, or for all together, I). 
82.6+, A. 67.5. 
While the average number of rays differs considerably in the two species, the number in each varies 
so much that the numbers in individual cases overlap, individuals of Lucifuga reaching as high as 88 
dorsal rays and individuals of Stygicola as low as 87. The same is true regarding the anal. 
A female of this species (fig. 3, pi. 21), 65 mm. long, contained four young about 20 mm. long. 
