366 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
9. *Roccus americanus (Gmel.) Jor. & Gilb. White Perch. 
This fish is found from April to October, and is gravid in May and 
June. It is most plentiful in August and September. 
10. Pomatomus saltatrix (L.) Gill. Tailor. 
In very dry seasons small examples of this species are found here. 
11. * Tylosurus marinus (BI. Schn.) Jor. & Gilb. Silver Gar. 
The silver gar makes its appearance in April. A gravid female was 
seen June %). 
12. *Hsox reticulatus Le Sueur. Pickerel. 
The species is said to remain throughout the year. 
13. Fundulus diaphanus (Le 8.) Agassiz. 
14. Brevoortia tyrannus (Latrobe) Goode. DBug-fish; Alewife. 
The species occurs here only in very dry seasons. ’ 
15. *Clupea sapidissima Wilson. Shad. 
Shad measuring 445 inches in length were seined June 10. It is said 
that quantities of the young about 4 inches long were seen in 1882 with 
the adults. The species appears in April and spawns on the flats. Shad 
have been caught plentifully in July; on the 3d of the month, one year, 
aman caught 44 ina gill-net in the swash just below the light-house. 
The shad has until recently been considered one of the weakest of fishes, 
and it was astonishing to see the treatment which it survived at Bat- 
tery station ; examples were taken from the seine, carried several steps 
to the pool in dip-nets, afterward seined out of the pool and pressed to 
see if the eggs were mature, and then returned to the pool, where they 
seemed to suffer no injury from the handling they had received. Some- 
times, in taking shad from the gill-nets, lampreys, presumably the young 
ot Petromyzon marinus, are hauled in fastened to the side of the fish. 
16. Clupea vernalis Mitchill. Branch Herring. 
The branch alewife first appears in February. It comes along shore 
and runs up all the small streams ; it spawns in the creek, and departs 
in May. Plenty of young alewives 24 to 3 inches long are seen in the 
creek in May. On the 10th of June a young branch alewife 4+ inches 
long was caught in the pool with a dip-net. Many of the young were 
seen in this inclosure. 
17. *Clupea estivalis Mitchill. Glut Herring. 
These appear late in April, coming up through the deepest water. 
They spawn on the flats and go up the river, departing in June. A 
small number were caught in the large seine June 9. 
18. *Clupea mediocris Mitchill. Hickory Shad; Hickory Jack. 
This species comes early in March; it spawns in the creek, with the 
branch alewife, on gravel and rocks, well out of the tide. It leaves in 
May. 
