406 



BULLETIN OF THE BUREAU OF FISHERIES 



There is circumstantial evidence offered in the testimony of D. H. Smith & Sons, 

 of Port Washington, Wis., who on May 26, 1921, sent the samples of chubs of which 

 reighardi comprised the majority, which indicates that spawning grounds for the 

 species are found near Port Washington. Mr. Smith states that a heavy run of 

 chubs began during the last week of April and continued until the middle of June 

 on grounds 3 to 4 miles E. to NE. by N. of Port Washington. The nets were run 

 along the beach at depths of 14 to 35 fathoms on bottom of "dirty sand with some 

 showing of mud." As heavy runs of chubs examined from other ports have been 

 found to consist of spawning fish of some species, it is likely that this run consisted 

 of spawning reighardi. Hoyi, the only other spring spawner, spawns in March. The 

 finding of a majority of reighardi approaching the spawning condition in the sample 

 of fish taken on these grounds on May 26, 1921, and the coincidence of the dates of 

 this run with the period during which the species must spawn (according to an 

 examination of the sexual condition of specimens collected at various times and 

 places) confirm the assumption. Mr. Smith states that to his knowledge the fish- 

 ermen of no neighboring ports found the run, but he is of the opinion that atrial on 

 suitable grounds probably would have been fruitful. 



Evidence of two kinds thus indicates that reighardi spawns probably in May 

 and early June at depths of 14 to 35 fathoms on a muddy sand bottom. 



Leucichthys reighardi dymondi (new subspecies) of Lake Nipigon 



The Nipigon race (fig. 18) differs more markedly from the typical form than any 

 of the other races but is much like the Superior race. The characters that can be 

 expressed numerically are compared below: 



Gill rakers on the first branchial arch: 

 Michigan, (31) 35-38 (43). 68 

 Nipigon, (32) 33-36 (38) » 



Lateral-line scales: 



Michigan, (67) 72-81 (96) . 68 

 Nipigon, (64) 66-73 (77). 59 



L/H: 



Michigan, (4) 4.2-4.5 (4.8). 

 Nipigon, (3.5) 3.7-3.9 (4.1). 

 H/E: 



Michigan, (3.6) 3.9-4.2 (4.4). 

 Nipigon, (3.6) 4-4.4 (4.8). 

 H/M: 



Michigan, (2.5) 2.6-2.8 (3). 

 Nipigon, (2.2) 2.3-2.5 (2.7). 



H/S: 



Michigan, (3.5) 3.7-4 (4.4). 

 Nipigon, (3.3) 3.5-3.6 (4). 



Pv/P: 



Michigan, (1.8) 2.1-2.4 (2.8). 

 Nipigon, (1.4) 1.6-1.8 (2). 

 Av/V: 



Michigan, (1.2) 1.4-1.7 (1.8). 

 Nipigon, (1.1) 1.3-1.6 (1.7). 

 L/D: 



Michigan, (3.5) 3.8-4.3 (5). 80 

 Nipigon, (3.5) 3.6-4.1 (4.4). 

 Scale rows: 



1. Michigan, (38) 40-43 (46) ."i 

 Nipigon, (37) 39-41 (43). 92 



2. Michigan, (30) 32-35 (39) . 81 

 Nipigon, (30) 31-33 (34) .« 



3. Michigan, 22-24 (26) « 

 Nipigon, 22-24. 62 



Dorsal rays: 



Michigan, (8) 9-10 (11). «* 

 Nipigon, (9) 10-1 1.«* 



w These figures for Lake Michigan are based on an examination of 192 specimens of all sizes from the southern sector of the 

 lake. Most of them are paratypes. All unmarked figures are given for 146 specimens ranging in length between 200 and 243 milli- 

 meters. 



« These figures for Lake Nipigon are based on an examination of 98 individuals ranging in length between 145 and 304 

 millimeters. Unmarked figures are given for 83 specimens 200 millimeters or more in length, 

 eo One hundred and eleven specimens over 200 millimeters. 

 N Thirty-one specimens. 

 « ! Eighteen specimens. 

 63 One hundred and seventy-nine specimens. 



