^^>. I. Smith on Brazilian Crustacea. 3 



Xantho denticulata White. 



X'lntho denticulata Whits, liist oi Crnat. in the British Museum, p. 17 (no descrip. 

 tion), 1847 ; Annals and Mag. Nat. Hist., 2d series, vol. ii, p. 285 {X. denticulafus), 

 1848 {nnn Stimpson); Smith, Proc. Boston Soc. Nat. Hist., vol. xii, p. 274, 1869. 



A single specimen collected at the Reefs of the AbroUios does not 

 differ from specimens from Bermuda and Aspinwall. 



It seemes to be an uncommon species as it is not mentioned by Dana, 

 Gibbes, or Stimpson, and I have only seen a single one from each of 

 the localities mentioned, 



Chlorodius Floridanns Gibbes. 



Chlorodius Floridanus Gihhes, \oc. cit., p. 175, 1850; Stimpson, Annals Lye. Nat. 

 Hist., New York, vol. vii, p. 209. 



Several specimens, not differing perceptibly from those from Florida 

 and x\spinwall, were collected at the Reefs of the Abrolhos. 

 Three specimens give the following measurements : — 



PanopeuS politUS Smith, loc. cit., p. 282, 1869. 



Plate I, figure 4. 



This species is allied to P. transversus Stimpson, and resembles 

 somewhat the crenatus of Edwards and Lucas. 



The carapax is entirely naked above, broad, moderately convex in 

 two directions, slightly granulous and uneven on the front and along 

 the antero-lateral border, but smooth and highly polished on the median 

 regions and posteriorly. The regions are slightly but distinctly indi. 

 cated. The gastric region is surrounded by a well marked sulcus, but 

 its lobes are not distinctly indicated except the anterior extremity of 

 the median, which is slender and acutely pointed ; the frontal lobes 

 are indicated by slight prominences. The hepatic region is not divided, 

 but there are one or two slight plications on its anterior part parallel 

 to the antero-lateral margin. The cervical suture is distinct in its 

 outer portion but is not indicated near the gastric region. The median 

 and posterior lobes of the bi-anchial region are separated by a distinct 

 depression. The front is strongly deflexed, the edge somewhat bev- 

 eled from above and four-lobed ; the median lobes are very broad, 

 project prominently and are separated by a sharp notch ; the lateral 

 lobes project as small narrow teeth. The antero-lateral margin is di- 



