FISHES OF SACRAMENTO-SAN JOAQUIN BASIN. 125 
7. Orthodon microlepidotus (Ayres). (Greaser Blackfish. 
Leuciscus microlepidotus Ayres, Daily Placer Times and Transcript, 1854, May 30, San Francisco. 
Gila microlepidota Ayres, Proc. Cal. Ac. Nat. Sci., vol. 1, 1855, p. 21, Sacramento and San Joaquin rivers. 
Orthodon microlepidotus, Pace Ry. Surv., vol. x, 1859, p. 237. Jordan & Evermann, Fishes of North & Mid America, 
pt. 1, p. 207, 1896. 
Head 3.8 in body, depth 4; eye 6 in head; interorbital 2.4; snout 3; dorsal 11; anal 9; pectoral 16; 
ventral 10; scales 27-97-11; teeth 6-6. (Measurements based on a specimen 184 mm. long from Sacra- 
mento River at Butte City.) 
Body long, slightly compressed; head small, the snout broad, wedge-shaped; mouth small, nearly 
horizontal, lower jaw included, the maxillary falling far short of eye, 4.5 in head; teeth 6-5 or 6-6; 
origin of dorsal in middle of body, over insertion of ventrals; ventrals reaching vent. Dusky, nearly 
black above. 
A large minnow of little value, distinguished by the small mouth and fine scales. 
The following is a table of measurements of 4 specimens: 
We Bo ; : | Es | 
acra- es oa- Kings acra- | © oa- | Kings 
mento | pelts quin River, mento SADIE quin River, 
Loeality River, | River River, Cen- Locality. | River, AGS River,| Cen- 
Butte | Gojusg.| Black  ter- | Butte | Goyie,| Black | ter- 
City. | Sa.) Dia- ville. | City. usa! Dia- | ville. 
| mond. | mond. 
| 
Length of body.-....... mm... 182 l40 154 123 Depth caudal peduncle ..... | 085 085 085 | 09 
Length of head... Soe ZF | -26 -26 | .26 || Length caudal peduncle....| .21 | .22 | -21 | 20 
Denthe. =< (oso 05-2 ae ees +25 -25. | .25 || Seales above lateral line... .| 26 | 26 | 25 24 
Diameter orbit. --| -052) 055 -055 | .06 || Seales on lateral line. -. -| 103 98 | 99 95 
Interorbital - .- 4b | -l1 | .11 || Seales below lateral line. .... | 13 | 13 | 12 13 
Length snout-.-.............| .09 | .08 | ‘08 | :os|| | 
} 
| 
Locat DistrrBuTion. 
Locality. Stream or lake. | Collector. Name as reported. Authority. 
} | 
San Francisco markets......| Sacramento and San Joaquin | Ayres...............- Leuciscus micro- | Ayres, 1854a. 
rivers. lepidotus, Gila 
microlepidota. 
Wie oScaas erica ateenens aaa WO ne oaaes~ fesse ages eas Orthodon micro- | Girard, 1856. 
lepidotus. 
DO: Jess ssevsnetiws sce Weeac GOR ate es se oe toe do. Lockington. 
Sacramento Rive Jordan & Jouy. 
| Clear Lake... .- Jordan & Gilbert. 
BULL Clty es. cncaesccase oss | Sacramento River. 
WOlQ8 A sees ae sos oe eaten | et ae COC are. ene eee d 
POI Ca UO swec aeccee seen | Arcade Creek. .......-.......- Rutter & Atkinson...)..... 
1 (1 eee ee oS ee eee Sacramento River...........- Eaten & Chamber- |.._.- 
ain. 
TRAV LY eS a [oaeien GIN a eRe be ee eo eal Re (Wena sese2 aecense-| Sane GG E sues sndee 
Black Diamond............- SiisunEBiy= 55 s2-2 aac ose c seeafece ee do... [Scotts Saas eee 
Gentarvillase Jc. s sss 52 hina Sloneh sn. car seca ct lee ee doreeees SEC (5 SA ee 
Dp eeeeee a secso See: ebonpetkitverse.6.2 s-225. 528. <2 | Rutter & Atkinson...|_.... ts (seer wee 
8. Lavinia exilicauda Baird & Girard. 
Lavinia exilicauda Baird & Girard, Proc. Ac. Nat. Sci Phila., 1854, p. 137, Sacramento River. Jordan & Evermann, Fishes 
of North & Mid. Amer., pt. 1, p. 209, 1896, and p. 2799, 1898. : 
Leucosomus occidentalis Baird & Girard, 1. c., Poso Creek. 
Lavinia compressa Proc. Cal. Ac. Nat. Sci., 1854, p. 21, San Francisco. 
Lugilus occidentalis Jordan & Evermann, |. c., p. 247. 
Head 4 in body, depth 8.5; eye 3.6 in head; snout 3.6; interorbital 3; dorsal 11, anal 13, scales 13-56-6, 
teeth 5-5, long and hooked. (Measurements based on a specimen 98 mm. long from Sacramento River 
at Jacinto.) 
