NEW WHITEFISHES. 
9 
The body is relatively slender, head short, snout short and rounded, maxillary just reaching a 
perpendicular through anterior margin of orbit, the latter being very angular anteriorly, and extending 
well forward of the iris. Gill rakers 7+11, short, thick and pointed. Fins large, the pectorals and 
ventrals bluntly pointed; dorsal with a straight edge; adipose much larger than maxillary; caudal 
deeply cleft, the lobes pointed. 
Color dusky above, silvery on the sides and below; no spots; scales on sides and below outlined 
with fine blackish dots; fins dusky, the caudal dark edged. Sex male. Each scale from the back 
to the level of the pectoral fin with a round, pearly mucous nodule. 
In a series of specimens the scales in the lateral series number from 69 to 78; between occiput 
and dorsal fin 25 to 30; above lateral line 8 or g; dorsal rays 10 or 11; anal g to rr. 
MEASUREMENTS OF TEN EXAMPLES OF COREGONUS ABYSSICOLA. 
Lengthiof body. o..32.ivecce es mm. . 258 234 211 235 233 245 213 223 180 206 
3 3 Cy a 3 2 ie 2 g 2 
Weeriptie eddie hse caciticice cle ciinieine exisivd oe «0 0. 22 0.225 | 0.22 0. 22 0-215 | 0.225] 0.23 0.215 | 0.24 ©. 205 
Depth’ body) ...55....05..00% pon +24 -24 +23 +235 +24 +25 ~26 25 -25 =24 
Depth caudal peduncle... . aoe 08 +075 +07 +075 +075 +074 +072 +07 +08 +07 
Length caudal peduncle.................... +13 4 +145 +14 +16 +16 +16 +16 +155 Sas 
Length STOWE... eee eee eee eee eee «07 08 +07 +O75 +07 O75 -O7 °75 +08 -O7 
Length MMARUAL Unt aceite neiesininideninn eases +05 +05 +05 +05 +052 +052 +05 +05 +055 +05 
Diameter eye....... etal lateie eter win eta icra etal iat +046 +05 +048 +045 +05 +047 +052 +046 +055 +05 
aterorbitalwridtha sso): hi isa keciesav ests-o sini -065 +06 +065 -065 +063 +06 -06 06 -06 -06 
Depth head......... Lae ate ae aero ciate +155 -16 +15 mais +14 +155 +155 +15 -16 +14 
Snout to occiput........ maot -19 «at -19 +19 +19 +19 +19 +19 +195 -18 
Snout to dorsal.......... 495 st 48 +48 475 49 48 +47 +47 485 
Snout to ventral........ sone 54 +55 +54 +54 +535 +56 +55 +55 +54 55 
arengthi hase of dorsaly ec. ene cence eee oe -12 .125 = 105 +10 +115 +10 +115 Io 12 Io 
Tenigth base of anal].2 oo: a. 20s. he: - os = 095 +085 -08 +085 +10 +09 +08 085 - 085 08 
Lei pitt ch ons Nepeetere aot ate eee cent eis +18 -18 165 +16 +16 -16 +155 155 +16 -16 
Height anal... ni 13 12 105 = 12 12 12 11s 11s -It 105 
Length pectora 205 21 19 +185 18 20 19 17 +19 19 
Length ventral Ee 155 “25 135 14 +15 +15 +14 +13 135 13 
SpemipthienGal es ie cia sialon cede ae ne +215 +215 +195 ~20 -20 +20 .22 195 20 2I 
Morsaliraysssctcs oer fee oo rete acini! Ir IL 10 ro Ir to Ir Io 1r 10 
Analrays......... noe It Io 10 10 Io 10 9 Ir 10 10 
Scales lateral line.......... Spar} 76 71 74 75 75 75 72 69 70 72 
Scales above lateral line... ict 8 8 9 8 8 8 8 9 9 
Scales below lateralline.................... 7 7 7 7 7 7 6 6 7 7 
Scales beforetdlorealys .. - 2.3. cane cess 30 28 27 28 27 27 25 25 27 28 
As indicated by the scales, the rate of growth appears to be as follows: 
- Length in 
millimeters. 
RV EATS Ol Clery tf elon eic cheese cree ercter-ketracslen ACR toon ooacee ai ble rakes say tecgees 180 
if ASE NETS) 0 IN RASC CRU OES Ge BERRI DRS AeA ROR CSE Th Sena Cri otal Sa Cie 210 to 240 
CSIC GNC) (7 LAS ee re AC ran 250 
RV EASON Cate trees tlt eras evterrre wf, poiaie, hers eis Mtacinie ates ate meee csmeaie eas 265 
MOEYCATS Gl edies favesyics stores. a yas eames ester tas Cusine mel nerve alelers st naiorsle ates atine eater 300 
SRY REAUS Ol Clee sterstenranee Leccdie de myas Urn wlan he sistem oases nie erase ate arene eet 310 
The gill rakers number 6 to 8+-13 to 15 on the first arch; the ceca 73 to 78; branchiostegals 7 or 8. 
