2870 Bulletin tf, United States National Museum. 



ally from its parent form, Salmo clarkii henshaivi. It may bo described as 

 follows : 



780(d). SALMO CLABK1I TAHOENSIS, Jordan <fc Evermann, new subspecies. 

 (SILVER TBOUT OF LAKE TAHOE.) 



Head 4-jV; depth 3| ; eye 7f in head. D. 9; A. 12; Br. 10; scales 

 33-205-40; 140 pores. Pectoral If in head; maxillary If. Body very 

 robust, compressed, unusually deep for a trout, the outline elliptical. 

 Head large, rather more compressed than in typical Salmo clarkii henshawi ; 

 eye small, silvery. Vomerine teeth in 2 long series, those of the 2 

 series alternating in position; hyoid teeth distinct, in a rather long 

 series; gill rakers short, thickish, 5 + 13. Mouth large, the maxillary 

 extending well beyond the eye. Preopercle moderate, its lower posterior 

 edge not evenly rounded, but with a slightly projecting, rounded lobe and 

 a slight concavity above and below, this character not strongly marked ; 

 opercle evenly, but not strongly, rounded. Scales small, reduced above 

 and below, those in or near lateral line largest. Fins moderate, the anal 

 rather high, with 1 more ray than usual ; caudal slightly lunate, almost 

 truncate when spread open. Color dark green above, belly silvery; sides 

 with a broad coppery shade covering cheeks and operclcs; sides of lower 

 jaw yellowish; fins olivaceous, a little reddish below; orange dashes 

 between rami of lower jaw moderately conspicuous; back, from tip of 

 snout to tail, closely covered with large, unequal black spots; spots on 

 top of head and nape round; posteriorly the spots run together, forming 

 variously shaped markings, usually vertically oblong; these may be 

 regarded as formed of 3 or 4 spots placed in a series, or with 1 or 2 at the 

 side of the other ; the longest of the oblong markings not quite as long as 

 eye; along side of head and body the spots are very sparse, those on head 

 round, those behind vertically oblong; belly profusely covered with small 

 black spots which are nearly round; still smaller round spots numerous 

 on lower jaw; all the spots on caudal peduncle vertically oblong or 

 curved; dorsal and caudal densely covered with oblong spots, smaller 

 than those on the body; anal with rather numerous round spots ; pec- 

 torals and ventrals with a few small spots, the first ray in each case with a 

 series of faint small spots; adipose fin spotted. The above description 

 from a specimen 2 feet 4 inches long and weighing 7 pounds. This form 

 attains a weight of 10 to 30 pounds and spawns only in the depths of 

 the lake. Salmo clarkii henshawi reaches a much smaller size, is much 

 darker in color, and spawns in the streams. Thus far known only from 

 the deep waters of Lake Tahoe. (lahoensis, from Lake Tahoe.) 



Salmo clarkii tahoensit, JORDAN & EVERMANN, new subspecies, Lake Tahoe. (Coll. 

 A. J. Bayley.) 



Page 518. It is wholly uncertain where Valenciennes got the specimen 

 which he called Thymallus ontariensis. It is probably the ordinary Gray- 

 ling ( Thymallm thymallus) of Europe, erroneously attributed to Milbert's 

 New York collection. In any case, its identity with the Michigan Gray- 

 ling ip more than doubtful, as the rivers in which the latter occurs were then 

 unexplored. The American Graylings would therefore stand as follows : 



