312 On the Holotype of Amniotliea caroliiiensis. 



Third rij::ht leg {cunt.) :— 



Tliird coxa 2"4 



Femur 8"0 



First tibia 80 



Seooiui tibia 9-84 



Tar.>u3 and propodus 4*8 



Clanr 1-92 



Auxiliaries 1-2 



Palp :- 



Second segment 2'88 



Third „ 1-2 



Fourth ,, 576 



Fifth „ 104 



Sixth „ 1-12 



Seventh „ 1-12 



Locality. — Leach says, " For this singular species I 



am indebted to Mr, Latham of Compton Street, who received 

 two specimens from South Carolina, which were caught on an 

 anclior that had been recently drawn from the bottom of the 

 sea." 



Nothing resembling Leach's type has been found in the 

 North Atlantic during the century that has elapsed since he 

 described it, all the known ppecies that are congeneric with it 

 coming, without exception, from the Antarctic seas. It seems 

 not unreasonable, therefore^ to suppose that Leach or his 

 informant may have been mistaken as to the origin of the 

 specimen*, and it is a tempting suggestion that ''South 

 (Carolina '^ was written instead of " Soutli Geoigia." There 

 is nothing improbable in the supposition thjit the specimens 

 may have come from the last-named locality, wiiich was 

 much frequented by British and American sealing-vessels 

 during the first two decades of the nineteenth century*. 

 On the other hand, the Museum records atfi)rd no information 

 on the point, and our scanty knowledge of the distribution of 

 Pycnogonida does not give much contidence as to what genera 

 may, or may not, be expected in the North Atlantic. 

 Bouvier's recent discovery of a species of Pentapycnon on 

 the coast of Guiana is a reminder of the risk of dogmatizing 

 on the subject. Nevertheless, until some evidence is pro- 

 duced that a species resembling tiiat described by Leach 

 docs occur in the North Atlantic, it is, I think, justifiable to 

 disregard his statement as to its origin in considering its 

 aflBniti/s. 



Affinities. — On comparing the characters of the specimen 

 as described above with Bouvier's keyf to the species of 



* See Weddell, Voy. South Pole (London, 1826), p. 63. 

 t Deuxieme Exp^d. Antarctique Fran^aise 1908-1910, Pycnogonides 

 du ' Pourquoi Pas ?/ p. 123 (1913). 



