15 



captured off Burnmouth on January 6th after an absence of not 

 quite three months. Recaptures continued to be made at Burn- 

 mouth in February, March and April, and it may be added are still 

 being made in July. No. 75 was captured at Ej^emouth (26 miles) 

 on December 30th, after being free for 82 days. The recaptures 

 made at St. Abb's (28 miles) furnish even more surprising results. 

 It may be worth while to reproduce these in tabular form. 



Xo. 4 — liberated Oct. 7, recaptured Jan. 27 = 112 days. 

 ,, 161— ,, ,, 11 ,, Nov. 21 = 41 „ 

 ,, 164— ,, „ 11 ,, Jan. 6 = 87 ,, 

 ,, 227— ,, ,, 12 ,, Dec. 1G = 65 ,, 

 „ 290— ,, ,, 17 ,, Dec. 23 = 67 ,, 

 ,, 291— .. .. 17 ., Nov. 22 = 36 ,, 



Recaptures were also made at St. Abbs in February and March. 



At Dunbar (41 miles) Nos. 91 and 214 were recaptured on 

 December 25th (77 days), and on January 7th (87 days) respectively. 

 Recaptures continued to be made at Dunbar in February, June and 

 also in July. 



On the other side of the Forth, No. 282 was captured in April 

 at Cellardyke in less than six months. And still farther north, Xo. 

 143 was obtained from Bervie (80 miles) on June 3rd, and No. 110 

 from Catterline (84 miles) on May 22nd, in ~\ to 8 months. The 

 Gardenstown specimen was captured after being free for 8 \ months. 



It took about the same time, 8| months, in 1902-3 for a crab 

 to reach Portlethen, Kincardineshire ; and in 1905-6, 1\ months, 

 for one to migrate to Montrose. In previous years, likewise, we 

 have had records of migrations to Burnmouth and St. Abbs in 3| 

 months, 



In a former season also we had an example of a crab captured 

 in the second year after liberation. This one was marked at New- 

 biggin between October 19th and November 10th, 1905, and recap- 

 tured on July 24th, 1907, at Catterline, Kincardineshire. 



The above records now make it fairly clear that the migration 

 is completed during the one season, and the last cited example may 

 be said to show that the crab does not immediately return if it ever 

 does, or, more than likely, that the northerly migration took place 

 in the second year. 



I have now to refer to an example which indicates an excep- 

 tional migration to the south. This is No. 29 in the table — a female 

 liberated on October 7th, and recaptured at Staithes, 66 miles 



