98 
BULLETIN OF THE UNITED STATES FISH COMMISSION 
105. Caranx bartholomasi Cuvier & Valenciennes. Yellow-jack. (* t f) 
Very rare, but has been obtained during four different years. Nine specimens about 6 inches long 
were taken in 1876; one 5£ inches long was obtained November 10, 1885; another was caught in Great 
Harbor September 30 of the same year; one 2J inches long was seined August 10, 1886. On October 
6, 1887, one 4J inches long was caught in a fyke net in Great Harbor. 
106. Caranx hippos (Linnseus). “Crevalld” ; Jack. (* t) 
Common. First appear about July 1, and caught as long as the fish traps are set, being most 
numerous in October. No spawn found in them. Young an inch long are taken about July 1. Large 
examples occur in fall; they sometimes measure over 2 feet in length and weigh 12 to 14 pounds. 
107. Caranx crysos (Mitchill). “Yelloiv Crevalle” ; Hardtail; Runner; Jurel. (* t) 
Arrives and departs about same time as foregoing. Young, 2 to 2-£ inches long, are caught in 
Buzzards Bay in summer. The largest are about 15 inches long and weigh 2 to 3 pounds. 
108. Alectis ciliaris (Bloch). Cobbler-fish; Threadfish. (* t §) 
Usually not common, but some years numerous. Found from June 15 until November 1, or later; 
taken in traps. Three to 8 inches long. 
109. Vomer setipinnis (Mitchill). Horsefish; “Dollar-fish.” (* t) 
Common some years, rare others, in Buzzards Bay and Vineyard Sound. Usually more numerous 
than Selene vomer. It first appears in August and is found during that month and September. 
110. Selene vomer (Linnaeus). Lookdown ; “Dollar-fish.” (* t) 
Rare. A few are taken each year in traps and with the collecting seine, usually in September. 
First noticed here in 1885. 
111. Trachinotus falcatus (Linnaeus). Round Pompano, (t §) 
Young very common; adults never observed. Fish half an inch to an inch long appear in July; 
by September 15, when they disappear, they are about 2 inches long. 
112. Trachinotus goodei Jordan & Evermann. Permit; Black-finned Pompano, (t §) 
Rare, and not observed every year. First obtained in 1894, when about a dozen specimens were 
seined on Nobska Beach, on September 18. In September, 1897, a number were caught at various 
places, in company with T. carolinus and T. falcatus. The specimens are all small — 3 inches or less in 
length. 
113. Trachinotus argenteus Cuvier & Valenciennes. Silvery Pompano. 
Rare. On September 7, 1885, a specimen was taken at Woods Hole which was- identified by 
Professor Baird as this species. 
114. Trachinotus carolinus (Linnseus). Common Pompano. (* t§) 
Adult fish rare, none having been observed for ten years. Young, from 2 to 4 inches long, com- 
mon, usually appearing between July 20 and August 1, and remaining till about end of September. 
FOMATOMIDiE. The Blue-Fishes. 
115. Pomatomus saltatrix (Linnseus). “ Bluefisli.” (*t$) 
Common. Arrives about June 1 and remains till some time in November, being taken as late as 
the traps are operated. Most numerous in July and October. Young first appear early in July, being 
about 3 inches long. Fish from 3 to 6 inches long are often very abundant in the harbors, several 
hundred being taken at one haul of the collecting seine. Many of this size are caught with Hues off 
the Fish Commission wharves. The largest are taken in fall; some weigh 14 to 16 pounds. Well- 
developed spawn is found in a small proportion of the bluefish when they first arrive, and at Nantucket 
large roes have been found as late as July 15. 
RACHYCENTRIDiE. The Sergeant-fishes. 
116. Rachycentron canadum (Linnseus). Cobia; Crab-eater. 
Rare. Not observed every year. All specimens recorded in this region have been taken in 
September in Buzzards Bay traps and have weighed 5 or 6 pounds. The fish appears to have been 
more common in the seventies than at present. 
