84 U. S. BUREAU OF FISHERIES. 
SEAL KI“LInGs ON PrisiLor ISLANDS In 1920—Continued. 
ST. GEORGE ISLAND. 
See! Skins ca Skins 
Date. of. Hauling ground. se- Date. of Hauling ground. se- 
ania cured aio © cured 
May 31 Uae Northies.- osecee ceeeenes 5 || July 13 19) | Zapadnise=. be seer eee 36 
June 7 2 | East Cliffs and Staraya 22 || July 15 20 | North and Staraya Artil.. 206 
Artil. July 17 Di tWastetec#h= Sono oes seee 354 
June 9 SulpNionghsassoece- soe Se sees 26 || July 19 22 | North and Staraya Artil.. 224 
June 12 Ay |eWastiClitisenes-cecsuecesee 20 || July 22 23 | East Reefand North...... 430 
June 16 5 | North, Staraya Artil, and 131 || July 24 24 | North and Staraya Artil-. 277 
East Cliffs. July 26 25; | masteRecksnce sass seen 103 
June 19 Gnlehasti Clifisess-menscseece es 11 |} July 29 26 | North and Staraya Artil. - 269 
June 21 7 | North and Staraya Artil. . 100 || July 31 27) Hast Reefs. 5. sas. asses 163 
June 25 8 | East Cliffs and North..... 58 || Aug. 2 28 | North and Staraya Artil-. 26 
June 28 9 | East Reefand North...... 117 || Aug. 4 29 | East Reefand North...... 80 
June 29 105) Zapadnisese aces sccaee= scice 58 || Aug. 9 SOU eaaes (ORES SR orinAbr nsec. 104 
June 30 11 | Staraya Artil.... 130 || Oct. 20 31 | East Cliffs and North..... 199 
Do A2a Northen ase 88 || Oct. 23 B2ieecse Osi Seto = dese clear 53 
July 3 13 | East Reef. 11 |} Nov. 2 853 [Encode GOs%n2ccss see eee 53 
July, <5 14 | North...-. 170 || Nov. 17 34 | North and Staraya Artil.- 69 
July 6 15 | Zapadni-. - - 37 || Nov. 19 35)| "Mast iClitiss=- 5-22) ssseeeee 12 
July 7 16 | East Reef and North 175 
July 10 17 | North and Staraya Art 521 Total > o-oo 4,428 
July 12 185) Hast Reeiios2 ssn. eeeeae 90 
AGE CLASSES OF SEALS. 
The present method of classifying seals of unknown age has been 
developed from experimental work conducted since the summer of 
1912, when a large number of male and female pups of that season 
were branded with a permanent distinctive mark. A few of these 
animals have been killed in each season since 1912 and the body 
lengths—from tip of nose to root of tail—and other data have been 
recorded. On the basis of the grewth attained by these seals in each 
of the several years, limits of carcass length have been adopted for 
each year of age, and seals are now classified in accordance with the 
position their respective carcass lengths occupy in the scale taken 
from the branded animals. The limits now in use are as follows: 
AGE STANDARDS OF Bopy LENGTHS OF SEALS. 
Nee Lengths of Lengths of ire Lengths of Lengths of 
Be. summer seals.] fall seals. Be. summer seals.| fall seals. 
Inches. Inches. Inches. Inches. 
Wearlings: <<. <scc-c. Up to 36.75 | Up to 38.75 || 4-year olds.........-. 46 to 51.75 48 to 53.75 
2-year olds........-.- 37 to 40. 75 39 to 42. 75 || 5-year olds..-.....-.. 52 to 57. 75 54 to 59.75 
3-year olds..........- | 41 to 45. 75 43 to 47.75 || 6-year olds..........- 58 to 63. 75 60 to 65. 75 
