102 Eoermann and Goldshorotigh — Fishes from Canal Zone. 



line .specimens sliowino; very distinctly the dark sjiot cm middle anal base. 

 Each has many eggs with the young, fairly well developed, curved 

 around the yolk and fully formed. 



Twenty-nine specinu-ns, '^f^ to 1}4 iuches long, from reservoir stream, 

 Caldera Island, Forto Bello Bay, April 9, 1908. All of tliese hut four 

 have the prolonged anal fin. The smallest of these four is 1 inch long. 

 In all the others the first 3 or 4 anal fin rays are produced and show a 

 white color in alcohol, behind wliich is the dark falcate spot extending 

 nearly to tip of fin. 



Dorsal 8; anal 9; scales 27; teeth fixed, in anarrow band, nolargeones. 



11. Poecilia sphenops Cuvier I't Valenciennes. 



Six specimens, % to IJ4' inches long, from a small stream at Tal;)ernilla, 

 agreeing well with current descriptions. 



Four specimens, 1% to 2}4 inches long, from Caldera Island, Porto 

 Bello Bay. The smallest one of these is a male. The others are females, 

 the largest of which had many well-dev£loped young, one of them being 

 % of an inch long. 



Three females, each about \^4 inches long, from a small mountain 

 stream on Caldera Island. 



Thirty-five specimens, % to 2^4 inches long, from Paraiso. 



Twenty-five specimens, Jg to 2 inches long, from a small seepage pool 

 below spillway of reservoir dam at Gorgona. In these specimens and 

 those from Paraiso there seems to be but a single row of teeth in each jaw, 

 an outer row of movable conic teeth; if there are smaller teeth behind 

 this row they are most minute and invisible with a good lens. 



Fifty specimens, % to 2^-4 inches long, from Tabernilla, January 15, 

 1908. 



Five spt'cinicns, -^i to l^g inches long, from Taberiiiilu, and 12 speci- 

 mens, 1 to 2 inches long, from Rio Boqueron. 



One c'xaniplc, a frniale 2 inches long, containeil (in young developed 

 sufficiently to sIkjw the eyes plainly. This sjjccies is evidently vivii)arous. 



Dorsal 9; anal 7; scales 28 to ;>0; teeth very small, conical, in a single 

 row or very narrow band, movable. 



F.\.Mii.v ARGENTINID.E. 



THE SILVERSIDK.'^. 



12. Thyrina pachylepis ((iill). 



One specimen, 2 inches long, from Rio Bocpieron. 

 Panama is the tyiie locality of this species. 



Family MUGILIDiE. 



THE MULLETS. 



K). Agonostomus monticola (Bancroft). 



Two specimens, XjJ^ and i!;^ inches long, from a small mountain brook 

 on Caldera Island. 



Dorsal IV, 8; anal 9; scales 38. 



