ZOOLOaY OF FERNANDO NORONIIA. 513 



are of a dark green colour with feeble indications of maculce, the 

 latter red-brown with maculee well developed. [Very common on 

 the rocks all over the group, running briskly just above water- 

 mark and leaping from stone to stone. — //. N. 



Grenus Plagusia, Latreille. 

 1806. Plagusia, Latreille (pt.), Gen. Crust. Ins. i. p. 33. 

 1837. Plagusia, Milne-Edwards, Hist. Nat. Crust, ii. p. 90. 

 1878. Plagusia, Miers, Ann. Mag. Nat. Hist. ser. 5, i. p. 148. 

 1886. Plagusia, Miers, Brachyura of H.M.S. ' Challenger,' p. 27L 



Plagusia depeessa (Fabricius). 

 1775. Cancer depressus, Fabricius, Syst. Ent. p. 406. 

 1782. Cancer squamosus, Herbst, Naturg. der Krabben, i. p. 260, pi. xx. 

 fig. 113. 



1878. Plagusia depressa, Miers, Ann. Mag. Nat. Hist. ser. 5, i. p. 149. 

 [This ran about on the stones and rocks like the Grapsus. — 



Genus Leiolophus, Miers. 

 1850. Acanthopus, deHaan, Faun. Japon., Crust., p. 29 (nom. prajocc). 

 1876. Leiolophus, Miers, Cat. New-Zeal. Crust, p. 46. 

 1878. Leiolophus, Miers, Ann. Mag. Nat. Hist. ser. 6, i. p. 153. 



Leiolophus planissimus (Herbst). 



1804. Cancer planissimus, Herbst, Naturg. der Krabben, iii. Heft 4, 

 p. 3, pi. hx. fig. 3. 



1878. Leiolophus planissimus, Miers, Ann. Mag. Nat. Hist. ser. 5, i. 

 p. 153. 



A single sj)ecimen (female with ova) of this wide-spread form 

 was taken. 



POECELLANIDEA. 



Family PoRCELLANIDiE. 



Genus Peteolisthes, Stimpson. 

 1869. Petrohsthes, Stimpson, Proc. Acad. Nat. Sci. Philad. x. p. 227. 



Petholisthes marginatus, Stimpson. 



1862. Petrohsthes raarginatus, Stimpson, Ann. Lyc. Nat. Hist. New 

 York, vii. }). 74. 



I have had no opportunity of examining specimens of P. 7?iar- 

 fjinaius (Stimpson), and consequently not being certain of the 



