ZOOLOGY OP FERNANDO NOEONHA. 



507 



DECAPODA. 



MAIOIDEA. 

 Family Periceeid^. 



Grenus Microphrts, M.- Edwards. 

 1851. Microphrys, M.-Edwards, Ann. Sci. Nat. Zool. 3, xvi. p. 251. 

 1879. Microphrys, Miers, Journ. Linn. Soc. {Zool.) xiv. p. 664. 

 1881. Microphrys, A. M.-Edwards, Miss. Sci. Mex. (Crust.) p. 59. 



Microphrts bicornutijs (Latreille). 



1825. Pisa bicornuta, Latreille, Encycl. Meih. Hist. Nat. x. p. 141. 

 1872. Microphrys bicornutus, A. M.-Edwards, Nouv. Arch. Mus. Hist. 

 Nat. viii. p. 247- 



1881. Microphrys bicornutus, id. Miss. Sci. Mex. (Crust.) p. 61, pi. xiv. 

 figs. 2, 3, 4. 



Nine specimens, six males and three females (two with ova). 



This species is common on the coasts of Florida, Mexico, and 

 of the West-Indian Islands. Occurred under stones and on 

 coral-reef. 



G-enus Mithrax (Leach). 

 I8I7. Mithrax (Leach), Latreilley Begne Animal, iii. p. 23. 

 1834. Mithrax, Milne- Edwards (in pt.), Hist. Nat. Crust, i. p. 317. 

 1879. Mithrax, Miers, Journ. Linn. Soc. (Zool.) xiv. p. 667. 



Mithrax yerrucosus, M.-Edwards. 



1832-38. Mithrax verrucosus, M.-Edwards, Mag. Zool. vii. pi. 4. 

 1881. Mithrax verrucosus, M.-Edwards, Miss. Sci. Mex. p. 102. 



Four specimens, two males and two females (one with ova). 



The largest specimen (a male), with the following measurements 

 of carapace, width 42 mm., length 35 mm., differs considerably 

 from the others, of which the smallest (the female with ova) gives 

 the following measurements of carapace : — width 17 mm., length 

 15 mm. In the three small specimens all the spines are sharper 

 and relatively longer, and the carpus of the chelipedes is armed 

 above with four or five minute spines in addition to the three 

 spines which adorn its anterior (interior) margin. 



Brazil and the West Indies are localities given for this species. 

 Under stones at Morro do Chapeo. 



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