72 STALK-EYED CRUSTACEA. 



deeply fiirroweil along the median line, the clielipeds and ambulatory legs 

 are knobbed so as to present - a mass of tubercles above." P. panamcnsts 

 appears to be near P. barhidus A. M. Edvv. from the Azores, but in the latter 

 species the front is broader and the carpus more denticulated. 



Family GALATEID^. 

 PLEURONCODES Stimps. 



Aim. Lye. Nat. Hist. N. Y., YIL 2i5, l!^00. 



Pleuroncodes monodon (J^L Edw.) ? 

 Plate XV., Fig. 3-3'. 



■>Galathea monodon M. Edw., Hist. Nat. Crust., II. 276, 1S37. 

 ? Pleuroncodes monodon Stimps., Ann. Lye. Nat. Hist. N. Y., VII. 245, 1860. 

 Pleuroncodes monodon ? Fax., Bull. Mus. Comp. Zool., XXIV. 176, 1893. 



Station 3385. 286 fathoms. 16 males, 7 fem. (" half a bushel rejected "). 



" 3386. 242 " 9 " 14 " 



" 3396. 259 " 2 " 2 " 



" 3423. 94 " 18 " 11 " 



Compared with Milne Edwards's figure* of P. monodon, the "Albatross" 

 specimens, especially the mules, present a more obese appearance ; their 

 greatest width is across the cardiac region, while in the figure of P. monodon 

 (which imdoubtedly represents a female) it is near the posterior end of the 

 carapace ; the cardiac area, in the examples before me, is sunk below the 

 level of the rest of the carapace, and the transverse piliferous lines are more 

 broken at this point, as well as on the gastric region, than appears to be the 

 case in P. monodon, to judge from the figure referred to. Unless these dis- 

 crepancies are due to the inaccuracy of Milne Edwards's draughtsman, the 

 "Albatross" specimens belong to a new species. The type specimens of 

 P. monodon came from the coast of Chile. 



In P. planipes Stimps. the penultimate segments of the ambulatory 

 appendages are flattened and ciliated, and the cardiac area is not depressed 

 as in the " Albatross " specimens. P. phnipa appears to be a pelagic form. 

 It has been taken off the coast of California and western Mexico. 



The lateral expansion of the carapace of P. monodon carries the antero- 

 lateral angle some distance outward beyond the antero-lateral spine. This 



» Ann. Sci. Nat., Zool., .3""" Sdr., XVI., Plate XI. Fig. C-I), 1851. 



