FROM THE FALKLAND LSLANDS. 329 



Family Portunid.e. 



Larval Genus Zoea Bosc. (PI. II,) 



17G9. Monocidns Slabber, Natuurkundicje Verlustiijinoen iiart 5 



p. 35, pi. 5. figs. 1,2. » « '1 



1S02. Zoea Bosc, Hist. Nat. Crust, vol. ii. p. 135. 

 1813. Zoe Leach, Edirib. Eiicycl. vol. vii. p. 389. 

 1818. Zoiia Leach, iu Tuckey's River Zaire Exp., Ajipendix 4, 



p. 414. 

 1830. Zoea Thonipson, Zoological Researches, vol. i. [Milne 



EdwardsJ. 

 1837. „ Milne Edwards, Hist. Nat. Crust, vol. ii. pp. 431-438. 

 1878. Zoiia Claus, Untersuch. des Crustaceen-Systems, pp. 1, 31^ 



63, etc. 

 1903 „ Williamson, Fishery Board Scotland, Rep. xix. pt. 3, 



p. 136. 

 1911. „ Williamson, Fisheries, Scotland, Sci. Invest. 1901 



No. 1. 

 1918. Zoea Meek & 0. Jorgensen, Rep. Dove Marine Lab 

 pp. 23, 62. 



Slabber's description and figure of his Monocuhis taurus seem 

 to give him priority in the observation of this form of crustacean 

 life. By his laudable anxiety not needlessly to increase the 

 number of genera he has lost the credit, such as it is, of giving 

 it its first generic title. Yet he recognised the absurdity of 

 including in the definition of Jfonoculus "oculi duo," whether 

 expressed or implied in the plural " oculi approximati." It may 

 be noticed that Leach gives a very uninstructive figure of his 

 Zoea^ clavata. The account by Milne Edwards of fluctuatino- 

 opinion down to 1837 is of great interest, as is that by Claus 

 later on. Professor Meek proposes that the term Zoea should 

 be limited to the larvae which have "more than eight but not 

 more than thirteen pairs of appendages." The specimen which 

 I have figured from the Falklands shows much likeness to that 

 represented by Claus (loc. cit. pi. xi.) as the Zoea of some member 

 of the family Portunidaj. 



Tribe OXYRRHYNCHA. 



Larval Genus Megalopa Leach. (PI. III.) 



1813. Megalopa Leach, Edinb. Encycl. vol. vii. pp. 394, 431. 

 ^^16. „ „ Encycl. Brit., SuppL, Ed. 5, p. 417. * 



1818. „ „ iu Tuckey's River Zaire Exp., Appendix 4. 



p. 414. 

 1825. „ Desmarest, Consid. gen. Crust, p. 200, 

 1837. Megalops Milne Ed wauls, Hist. Nat. Crust, vol. ii. p. 260, 

 1874. „ S. I. Smith, Invert. Vineyard Sound, p. 237 (531), 



pi. 8. lig. 38. 



[3] 



