332 ME. E. J. MIEES'S EEVISION OF THE HIPPIDEA. 



certain Amphipo^a (e.g. Ceretptis) , except ihsit in the Amphipoda 

 the antepenultimate joint is produced at its antero-inferior angle. 

 The species are all from America. 



Lepidops sctjtellata. 



Albunea scutellata, Desm. Consid. Crusf. p. 173 (1825) ; M.-Edw. Hist. 



Nat. Crust, ii. p. 204, pi. xxi. figs. 9-13 (1837) ; Gibbes, Proc. Amer. 



Assoc, T^. 187 (1850); Dana, U.S. Expl. Exp. xiii. Crust, i. p. 406 



(1852). 

 Lepidopa scutellata, Stimpson, Proc. Ac. Nat. Sci. Phil.^. 230 (1858); 



Ann. Lye. Nat. Hist. New York, vii. p. 79 (1862). 



Carapace scarcely emarginate, and without any noteworthy 

 denticles or spines on its anterior margin. Eye-peduncles much 

 broader than long, and truncate anteriorly. Length of carapace 

 7 lines. 



Hah. Peru, San Lorenzo ? (Dana) ; Island of St. Thomas (A, 

 H. Jtiise). 



No locality is mentioned by Desmarest * or Milne-Edwards for 

 this species. Dana observes of the specimens collected at San 

 Lorenzo that the proportions are different from those in the figure 

 by Edwards. The hand is very thin and high, the height being 

 equal to the length ; the lower margin is slightly arcuate, and not 

 at all deflexed at the base of the immobile finger ; this finger h 

 acute and short, the margin above it vertical and hairy. The front 

 margin has a low median point, and also another equally advanced, 

 halfway to the side, with the margin between sinuous. It is not 

 improbable that the specimens from St. Thomas and San Lorenzo 

 may prove upon comparison to belong to distinct species. Lengtl> 

 of carapace of female 6 lines. I have seen no specimens. 



Lepidops venusta. 



Lepidopa venusta, Stimpson, Proc. Ac. Nat. Sci. Phil. ip. 230 {1858, 

 sine descr.) ; Ann. Lye. Nat. Hist. New York, vii. p. 79 (1862). 



Carapace glabrous, of a silvery hue, with bluish reflections (in 

 specimens preserved in spirits). The markings of the dorsal 

 surface of the carapace are less profound and less numerous than 

 in L. scutellata ; and the principal transverse sulcus is nearly 

 straight and not undulated as in that species. Eront tridentate ; 

 lateral teeth situated at about halfway between the median one 

 and the lateral angles, and consequently nearer the median one 



* Desmarest considered his specimens to be the Hijjpa {Albunea) scutellata of 

 Fabricius; but see above, under Ecmipes scutellatus. 



