382 THE GENUS PANOPEUS — BENEDICT AND RATHBUN. 



8. Pauopeus purpureus Lockington.* 



Panopeus pui'jnircHn. W. N. Lockington, Proc. Cal. Acad. Sci., vii, p. 101, 1876. 

 Streets and Kingsley, Bull. Essex lust., ix, p. 105, 1877. J. S. Kingsley, Proc. 

 Boston Soc. Nat. Hist., xx, p. 152, 1379. A. J^Iilne Edwards, Miss. Sci. au Mes- 

 ique, pt. 5, i, p. 31(3, pi. LVii, fig. 13, 1880. 



•Kingsley says of this species: 



This form is very near P. ralidits Smith, and probably will prove to be merely a 

 variety of it. In comparison with Smith's description and with authentic specimens 

 of P. raJidus hronght from the Gnlf of Fonseca, by J. A. McNiel, it presents the fol- 

 lowing ditferences: Carapace smoother, and the granulons ruga? less numerous ; front 

 less prominent, and, seen from above, nearly straight; fissures of the orbit less evi- 

 dent; tooth at iuntr angle of orbit below broader and shorter, second normal tooth 

 of antero-lateral margin separated from the angle of the orbit by a narrower, more 

 triangular notch ; notches between theremaining teeth narrower, the teeth themselves 

 having a distinct elevated margin. Propodus of chelipeds with an obtuse crest 

 above; the tooth on the outer surface of larger hand nearly obsolete, dactylus with 

 a large basal tooth. Ambulatory feet less compressed than in P. validus. 



Lower California; \vest coast of Nicaragua. 



This species appears to us to be nearer to chilensis thau to vaUdus. 



9. Panopeus xauthiforniis A. Milne Edwards. 



Pauopeus xanthiformis. A. Milne Edwards, Miss. Sci. au Mexique, pt. 5, i, p. 353, 

 pi. Liii, fig. 4, 18S0; Bull. Mus. Comp. Zool., viii. p. 13, 1880. E. .J. Miers, 

 Challenger Rept., ZooL, xvii, p. 129, 1886. 



Resembles Xantliodes. Carapace flattened, granulated on the antero- 

 lateral borders. Front composed of two lobes; median fissure narrow. 

 Orbit wide; inferior border crenulate. First antero-lateral tooth small, 



*Since this paper has been in type, several specimens of purpureus, from Guaymas, 

 Mexico, have been presented to the National Museum by Mr. P. L. Jouy. The fol- 

 lowing description is based on these specimens: 



Carapace convex in both directions, finely granulate, marked on the anterior half 

 by transverse gr.anulous rugai. Front nearly straight, faintly four-lobed. Coalesced 

 tooth with shallow, rounded sinus. Remaining teeth much as in herhstii, not strongly 

 hooked nor separated by broad sinuses as in validus. Suborbital margin three-lobed. 

 External hiatus deep and narrowly V-shaped. Subhepatic tubercle prominent. 



Proximal eiul of second segment of male abdomen much wider than the dist.alend 

 prolonged laterally in an obtuse lobe. Outline of last three segments resembling 

 that of herbstU. Seventh segment of sternum slightly exposed. 



Chelipeds granulate. Carpus broad, finely rugose; tooth at inner angle sharp, 

 groove present. Hands short, deep, with a double crest above. Dactyl of ^arge 

 hand with a stout tooth; a broad tooth on the hand at the base of the dactyl. 

 Dactyls of third and fourth ambulatory feet much longer than in vaUdus. 



Color of carapace, dark, bluish brown; upper surface of chelipeds, lighter violet 

 brown; both carapace and chelipeds spotted with irregular blotches of dark reddish 

 brown. Under surface of chelipeds, orange yellow. Fingers light brown, white at 

 the tips. 



This species is very distinct from validus, and is well figured by A. Milne Edwards. 



Length, '25.5 millimetres; width, 37 millimetres. 



GuaJ-mas, Mexico; P. L. Jouy, 1891 (16080). 



