Jordan a?id Evermann. Fishes of North America. 469 



the associate of Linnaeus, and perhaps the ablest systematic zoologist of 

 the 18th century.) 



Coregonus artedi, LE SDEUR, Journ. Ac. Nat. Sci. Phila., i, 1818, 231, Lake Erie; Niagara 



River ; JORDAN & GILBERT, Synopsis, 301, 1883. 

 Coregomis clupeiformis, GUNTHER, Cat., vi, 198, 1866, and of many authors, but not Salmo 



chqieiformis, of MiTCHlLL. 



Salmo (Coregonus) Jiarengns, RICHARDSON, Fauna Bor.-Amer., in, 210, 1836, Lake Huron. 

 CoregoHus harengus, GUNTIIEK, Cat., vi, 199, 1866. 



Represented in numerous small lakes in Indiana and Wisconsin (Tip- 

 pecanoe, Geneva, Oconomowoc, La Belle, etc.), by the slightly modified 



764a. ARGYROSOMUS ARTEDI SISCO, Jordan. 

 (Sisco OF LAKE TIPPECANOE.) 



Smaller than the Lake Cisco, but superior as food; living in deep waters, 

 except in December, when it ascends brooks to spawn. (Sisco or Cisco, a 

 vernacular name, probably Indian.) 



Argyrosomus mco, JORDAN, Amer. Nat., 1875, 136, Lake Tippecanoe, Warsaw, Indiana. 

 (Coll. Judge J. H/ Carpenter.) 



765. ARGYROSOMUS HOYI, Gill. 

 (MOON-EYE Cisco ; Cisco OF LAKE MICHIGAN; KIEYE OF LAKE MICHIGAN.) 



Head 4i; depth 4|; eye 4 5 L to 4; snout 3| to 3^ ; maxillary 2 to Sin 

 head, reaching to vertical of middle of pupil. D. 10; A. 11 or 12; scales 

 8 or 9-73 to 80--7. Gill rakers 14 -f 25 or 26, slender, about 2 in eye. 

 Vertebras 58 ; branchiostegals 8 or 9. Body rather elongate, compressed, 

 the back somewhat elevated. Mouth rather large, subterminal, the lower 

 jaw shorter than upper, even when the mouth is open; tip of muzzle 

 rather bluntly truncate, somewhat as in a true Coregonus] mandible 

 nearly reaching posterior edge of eye, 2 in head. Head rather long, 

 slender, and pointed. Supraorbital and preorbital long and narrow. 

 Distance from tip of snout to occiput 2 to 2| in distance from occiput to 

 origin of dorsal fin. Fins low ; free margin of dorsal very oblique, the 

 length of the anterior rays If in head, that of the last ray less than half 

 length of the first; longest anal ray 2f in head and more than twice as 

 long as the last ray. Pseudobranchiae very large ; tongue with traces of 

 teeth. Color light iridescent blue on back, scales with a few fine dark 

 punctulations reaching about two scales below lateral line ; sides and 

 under parts rich silvery, brighter than in any other of our Coregonince, 

 much as in Hiodon and Albula', top of head light olivaceous; cheeks sil- 

 very; dorsal, caudal, and pectorals with some dark on their margins; 

 anal and ventrals white, with some dark dustings ; the male perhaps a 

 little richer, more iridescent blue on back, and with the scales a little 

 thicker and less closely imbricated. Length 13 inches. Deep waters of 

 Lake Michigan ; one of the smallest and handsomest of Coregonince. The 

 only specimens known were the two sent to Dr. Gill and the one to Dr. 

 Jordan by Dr. Hoy, until recently rediscovered by the United States Fish 

 Commission, who find it to be the principal fish caught in the gill nets in 

 the western part of Lake Michigan. It is taken in large numbers off 



