FISHES OF THE DISTRICT OF COLUMBIA. 
185 
ESOCIDiE. The Marine Gars. 
50. Tylosurus marinus (Walbaum). * “Silver Gar”; Sali-ivater Gar ; Needle-fish; Billjlsh. 
This salt-water fish is a regular visitant, coining in spring with the braucii herring and remaining 
throughout tlie suuinier. It ascends the river as far as the Aqueduct Bridge. Usually oliserved 
swiiuniing at the surface in scattered bodies. At times it is a nuisance to anglers on account of its 
bait-stealing habits. 
SYNGNATHIDiE. The Pipefishes. 
51. Siphostoma fusciim (Storer)*. Pipefish. 
A straggler from salt water, once taken at Guustou, Va. 
PERCOPSIDiE. The Trout Perches. 
52. Percopsis guttatus Agassiz.* Trout Perch ; Sand-roller. 
This sjiecies is not abundant, so far as known, and has up to this time been taken only in Rock 
Creek and Cabin .John Run. 
APHREDODERIDiE. The Pirate Perches. 
53. Aphredoderus sayanus (Gilliams).* Pirate Perch. 
Professor Baird has reported that he saw a specimen of this fish from the Potomac many years 
<ago. Recently found at Laurel, Md., by Mr. George Marshall, of the U. S. National Museum. 
ATHERINIDiE. The Silversides. 
54. Menidia beryllina (Cope).* Silverside. 
This species was described in 1866 by the late Professor Cope from specimens taken in tlie 
Potomac near Washington. It is more or less common in the vicinity of Long Bridge and the mouth 
of Four-Mile Run. 
CENTRARCHIDiE. The Basses and Sunfishes. 
55. Pomoxis sparoides (Lac6phde).* “Strawberry Bass”; “Strawberry Perch”; “Grapple”; Calico 
Bass; “Speckled Perch.” 
56. Pomoxis annularis Rati nesque.* “ Crappie” ; Bachelor. 
Both of these species were introduced into the Potomac River and the Chesapeake and Ohio 
Canal by the Fish Commission in 1894, and have become very common in places, noticeably Little 
River, Four-Mile Run, Eastern Branch, and in the river near Seven Looks; also throughout the canal 
as far as Harpers Ferry. P. annularis is the more abundant hero. These are excellent game and food 
fishes and many are now caught by anglers. The two species are much alike and not usually distin- 
guished by local fishermen, rvho apply the names “crappie,” “strawberry bass,” “strawberry pei'ch,” 
and “speckled perch” indiscriminately. 
57. Ambloplites rupestris (Ralinesque). Bock Bass; Bed-eye Perch; Goggle-eye. 
Not native, but introduced by the United States Fish Commission in the Patuxent River near 
Laurel. Md., and in Rock Creek in the fall of 1894. Also distributed to individuals for pond culture 
in the District and adjoining parts of Maryland. 
58. Chgenobryttus gulosus (Cuvier & Valenciennes).* Warmouth; Bed-eye Perch; Goggle-eye. 
Introduced into the Potomac by the Fish Commission about 1895, and apparently becoming 
common in a few places. First specimen was taken December 4, 1897, in Little River. In 1898 five 
were caught in Four-Mile Run. 
59. Eiineacaiithus glorio.sus (Holbrook).* Blue-spotted Siinfish; Little Sunfish. 
This very pretty sunfish frequents sluggish waters with aquatic vegetation. Specimens have 
been taken in Roach’s Run, where it is fairly common, and in the Government fish ponds near the 
Washington Monument. Maximum length about 3 inches. An attractive and hardy aquarium fish. 
60. Eiineacanthus obesus (Baird).* Little Sunfish. 
Found under the same conditions as E. gloriosus, but not so common. 
