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BULLETIN OF THE BUREAU OF FISHERIES 



Type 



The type is a female specimen (catalogue No. 87351, U. S. National Museum), 

 210 millimeters in length, collected in Lake Michigan on April 1, 1921, off Michigan 

 City, Ind., in 30 fathoms of water. Counts of certain multiple parts and pro- 

 portional lengths for this specimen are shown in Table 33. Certain numerical 

 expressions of type characters are repeated in the description. 



Leucichthys reighardi reighardi of Lake Michigan 



Reighardi is one of the smaller chubs, ranking in respect to size with Tciyi and 

 hoyi. The largest specimen collected measures only 278 millimeters in length, and 

 most of the fish seen have been smaller than 240 millimeters. The body is little com- 

 pressed, much less than in any other member of the genus excepting artedi, and, as 

 seen from the side, tapers smoothly and regularly to the head and tail from the 

 deepest portion of the body, which is through a point at the front of the dorsal. 

 In most of the specimens at hand the depth at this point is 22 to 26 per cent of the 

 total length. Occasionally an individual is taken in which this figure rises to 29 per 

 cent, and in such specimens the predorsal profile is steeper over its anterior half. 



The head is of medium size, moderate depth, bluntly triangular in side view, its 

 dorsal contour (not including the premaxillaries) straight or faintly curved. It is 

 contained 4.4 [(3.9) 4.1-4.5 (4.8)] 50 times in the total length. 



The snout is relatively short and is contained 3.8 [(3.2) 3.4-4 (4.4)] times into 

 the head length. In side view it is usually truncate on account of the nearly vertical 

 position of the. premaxillaries. The premaxillaries are always heavily pigmented and 

 usually make an angle of 60° to 70° with the horizontal axis of the head, so that their 

 tip is usually at or below the lower edge of the pupil. The maxillary is always more 

 or less pigmented, the cutting edge usually rimmed with black halfway to its distal 

 end. It is contained 2.7 [(2.3) 2.5-2.8 (3)] times in the head length. The lower jaw 

 is always shorter than the upper and is usually heavily tipped with black. The max- 

 illary plus snout divided by eye equals 2.3 [(2.2) 2.4-2.6 (2.8)] 51 in south; in north 

 [(2.2) 2.5-2.7 (3.1)]. 52 The eye is relatively large and is contained 3.8 [(3.6) 3.9-4.2 

 (4.6)] times in the head length. It is situated in the second quarter of the head's 

 length, encroaching more or less on the third. The gill rakers on the first branchial 

 arch number 14 + 23 [(11) 12-14 (16) + (19) 21-24 (27)= (30) 34-38 (43)]. 63 The 

 lateral line is nearly straight; its scales number 74 [(66) 72-81 (96)]. 63 Rows of scales 

 around the body in front of the dorsal and ventrals number 41 [(38) 40-43 (46)]; 54 

 in front of the adipose and anus 31 [(30) 32-35 (39)]; 54 around the caudal peduncle at 

 its commencement 22 [22-24 (26)]. 64 



The dorsal fin is relatively low and has 9 [(8) 9— 10(H)] 55 rays. The anal rays 

 number 10 [(9) 10-11 (12)]; 56 the ventral rays 11 [10-12]; 56 the pectoral rays 16 



m The ratios given in brackets (except where otherwise noted) are based on an examination of 314 specimens, among them 145 

 paratypes, ranging in length from 200 to 278 millimeters. 



•i One hundred and thirty-three specimens 200 millimeters or more in length. 



82 One hundred and fifty-eight specimens 200 millimeters or more in length. 



83 Four hundred and six specimens of all sizes. 

 « Thirty-one specimens. 



81 One hundred and seventy-nine specimens. 

 19 Forty-four specimens. 



