318 CALLORHINUS URSINUS NORTHERN FUR SEAL. 



five pounds, but that they range in weight from seventy-five to 

 one hundred and twenty pounds, and that the five and six year 

 old males, on their first appearance in May and June, when fat 

 and fresh, may weigh a third more than in July, or at the time 

 those mentioned in the table were weighed, which would thus 

 indicate an average maximum weight of about 375 pounds for 

 the six-year-old males. According, however, to my own meas- 

 urements of old males, from mounted and unmounted specimens, 

 the length is between seven and eight feet ; and of a full-grown 

 female, about four feet. Captain Bryant states* that the males 

 attain mature size at about the sixth year, when their total 

 length is from seven to eight feet, their girth six to seven feet, 

 and their weight, when in full flesh, from five to seven hundred 

 pounds. The females, he says, are full grown at four years old, 

 when they measure four feet in length, two and a half in girth, 

 and weigh eighty to one hundred pounds. The yearlings, he 

 says, weigh from thirty to forty pounds. The relative size of 

 the adults of both sexes and the young is well shown in the 

 accompanying cut (see p. 317), drawn by Mr. Elliott. 



The subjoined table of external measurements may be taken 

 as indicating the general size of the adult males and females, 

 and the young at thirty-five days old. In some respects the 

 dimensions are only approximately correct, being taken from 

 mounted specimens ; in the main, however, they are sufficiently 

 accurate. A few measurements taken from the soft skin are 

 also given $ I accidentally omitted to make a complete series of 

 measurements of the skins before they were mounted. In addi- 

 tion to the six specimens of Captain Bryant's collection, I am 

 indebted to Mr. W. H. Dall for measurements of a male and a 

 female, taken by himt from the animals immediately after they 

 were killed. The female (said by Mr. Dall to be six years old) 

 is evidently adult, but the male, being but little larger, seems 

 not to have been fully grown. In the last column of the table 

 a few measurements are given of a male specimen of the Arcto- 

 cephalus " falklandicm? taken by Dr. G. A. Maack from a fresh 

 specimen collected by him at Cabo Corrientes, Buenos Ayres. 

 This specimen appears also to have not been fully grown. 



* Bull. Mus. Comp. ZooL, vol. ii, p. 95. 



t At Saint George's Island, Alaska, August, 18G8. 



