FISHES OF STREAMS FLOWING INTO SAN FRANCISCO BAY. 38381 
CATALOGUE OF SPECIES. 
1. Entosphenus tridentatus (Gairdner). 
Taken by Mr. A. C. Herre in Coyote Creek, March, 1905. 
2. Catostomus occidentalis Ayres. 
San Francisquito, Madera, San Antonio, Stevens, Campbell, Guadalupe, Coyote, 
Alameda, Arroyo Honda, Smith, and Isabel creeks. 
The species disappears from Madera Creek during periods of great drouth, 
returning when conditions are favorable. 
3. Orthodon microlepidotus (Ayres). 
Coyote Creek. 
4. Lavinia exilicauda Baird & Girard. 
Coyote and Alameda creeks. 
5. Pogonichthys macrolepidotus (Ayres). 
Coyote Creek. 
6. Ptychocheilus grandis Girard. 
This species differs from P. oregonensis, its representative in the Columbia basin, 
in having fewer dorsal rays (8 in P. grandis, 9 in P. oregonensis) and larger scales 
above the lateral line (13 to 17 rows compared with 17 to 21 in P. oregonensis) ; 
also, there are fewer rows of scales passing over the back between occiput and dorsal 
fin in P. grandis (37 to 41, against 40 to 53 in P. oregonensis). 
The number of rows of seales above the lateral line is usually 14or 15. Frequently 
but 13 are present, while rarely as many as 16 or even 17 have been observed. The 
pharyngeal bones appear to show no characters distinctive of the species. 
San Francisquito, Coyote, and Alameda creeks. 
Measurements of 10 speciinens of P. grandis from Alameda Creek, Sunol, Alameda 
County, Cal. @ 
SOS pee ca eelo seme ee acieracetee sears Male. Female. 
Length of body in millimeters......... VELL SOM a D465|> Tebn |= TOQ 23s 22: | Ss oe LOL 90 
Monet OLOmMNCAGs scence cocnse eee S29 Zo 200) | saloon 20 200 | tO” | Go| 26 29 
TD ieyetiol lover hie ee na aeno an ob odoeneDoodeead . 215 seal eet) .19 sal soll . 20 ApAL . 20 nee 
SMO WUsLO COTS Olen era eects aia = wlaraieres TOO) wos! |lmeon 57 57 .08 OO SOO! 1090 - 58 
SUOMebOnVeUUrales = see = eee ese tatelocia DSU eDOU spo) |) 0D. |) O60) O71). 5600! p65. |) 560 olay 
Depth caudal pedunele.-...---.......-- BOO) i 09.09%) 097) 095) 09L sO9r\ 309) 209 09 
Length caudal peduncle.....-......... as lbzfar |) theta salty oulaiey Ball) sal slaty Salefoy| eae als) .16 
IL(Savetiol SOY Ron asa eureceo Sooe JdoSer aaa P1OU | lO! P09N 095: |= HOON 095; | 09). 10" 095 .10 
ILSays imac b-aM AA eemeecoceoge oaSoOeaoe sails) Galil’ Scala alba) oa lal satay). gat! 5ailil anit apl 
MIAME ETI Chee sicemiaees sce cee ieee . 05 .05 .05 O5u Me Os .05 aCe | ala) . 05 .05 
MMEROT OULU W A CUUL = aeajeiereelsloiorarcmiateiei<fe< SOSH OSs OSH a USa SOSH = O7Dr i OSk\ Ovonl 08 . 08 
M CPUC ACLs yap eee etn oe cieeicine aeerowieee gills} salsa | stomp a ilisyel| ella Seahss || 9 aka). lose Salle .16 
Then pth base OLMOrsal-acnceecssen cle ola opal! Salil oe) CL05: |) S15 PLO Od" |. 205 Sil 
18 epee aiinte 09 dof eA Sa aero moAeRpascemene a by 18 .18 Aas; ple) .19 | .185 sats) 19 . 20 
Men ath base. Of amalloss- - soscne camel it .09 | .095} .09 | .095 | .095 | .095 | .09 | .095 | .09 09 
Telenione Phan eR eR Soe cocdenacodcoe .15 | .165 | .165 S16!) a6 AA! Gals 165°} .17 18 
HAG M OO DWC CTOLA NE ooops alate wien = =atetala taco slain Sa aelror ee ai ew enl Gl me alO a liene LG don atl: |eccueil .18 
Leva sol pasate Wo see epson pocoS - OBS oEBe pelican fi a sah aa ee! Od ii! .14 14 S14 4: als 
MRT UH CHU Ge ce cerepenie aciaris)n slaisic eee vie ies SOGDRl Se DOon ero tal) mete ede |e 2 tdimeneoel) cle Need 29 
WWoncnilerae=oesee ees conosco han ee n= stra 8 8 8 8 8 8 | 8 8 | 8 8 
PAT AEN SD OMe sete ete ewioe a claciaininic)slorsiate 8 8 8 8 8 8 8 8 8 8 
Sealesilaveral line: 28-45-05 ce~ o=—-- ~~ ~~ 75 77 74 73 77 77 chi 76 75 77 
Seales above lateral line....-......-... 13 14 14 13 14 14 14 14 15 15 
| | | 
aExpressed in hundredths of the length of the body measured from tip of snout to end of last 
vertebra. 
