336 RKV. T. K. 11. STEBBIXG OX CRUSTACEA 



that the second to the fourth pairs of walking-legs are longer 

 and stronger than the fifth to the seventh pairs, though his 

 specific description shows that he means just the i-everse. Hodg- 

 son in describing the mandible says of the palp, " first and third 

 joints subequal, third the longest," his figure showing correctly 

 the second joint as the longest. Chilton and Hodgson, witii a 

 lingering retention of the name Ualiacris, agree that the name 

 must be regarded as a sj^nonym of Munna. Hansen points out 

 that the character "eyes distinct" must be withdrawn from the 

 definition given by Sars, if the genus is to include such species as 

 Munna cceca Richai-dson, M. truncata Richardson, and M. acanthi- 

 fera Hansen. But he does not notice Miss Richardson's proposal in 

 1908 (Pr. U.S. Nat. Mus. vol. xxxv. p. 79) to substitute the generic 

 name Ccecwiunna for the species truncatus and Haplomimna for 

 the species ccecus. Should these proposals be adopted, Hansen's 

 acanthifer would probably be allotted to Ccecimunna, thus with- 

 drawing all the blind species from Munna. In 1913 Miss 

 Richardson advocates the retention of Haliacris on the ground 

 of the special structure of the first gnathopods in the male and 

 their great size. This distinction would require the inclusion, 

 along with Pfefter's species, of Munna jmlmatus Lilljeborg, 1851, 

 and Mionna neozelanicus Chilton, 1892. But it is at least highly 

 inconvenient to have the adult male in one genus, while the- 

 females and young males can be appropriately placed in another. 

 In M. kroyeri Goodsir the carpal joint of the male's first gnatho- 

 po«l is large', while in M. palmatus it is very much larger, but 

 surely this by itself should not count for geneinc difterence. In 

 instituting his genus Pfeft'er was himself luiacquainted with the 

 full development of the fli'st gnathopod in tlie adult male. 



Munna antarcticus (Pfefl:er). (PI. V.) 



1887. Jialiaa'is antarctica Pfeflier, Krebse Siid-Georgien, Pt. 1,. 



p. 97, pi. 6. figs. 28-47"^ 

 1902. ,, australis Hodgson, 'Southern Cross' Crust.,. 



p. :^53, pi. 34. figs. 1 a-d, pi. 37. 

 1906. ,, ,, H. Richardson, Exp. Antarct, fran- 



9aise, p. 16, fig. 20. 



1909. ,, antarctica Chilton, Subant. Is. N.Zealand, Crust.,. 



p. 650, fig. 14 h. 



1910. .. „ Hodgson, Nat. Antarct. Exp., Isop., 



pp. 58-61. 

 1913. H. Richardson, Deuxieme Exp. Ant. 



frangaise, p. 19. 



Mr. Hodgson says of the specimens obtained by the ' Dis- 

 covery ' that some of the old males " attain a length of seven 

 millimetres." None of the Falkland Island specimens exceeded 

 3 mm. Yet the single example of an adult male first gnathopod 

 is very characteristic of the advanced development. It difiers 

 slightly from the only other available figure, given by Miss 



