418 A. E. Verrill — Decapod Crustacea of Bermuda. 



long ; 9™™ wide with spines ; 7.5™"" without spines ; length of chela, 

 gmm. height, S-S™-". 



Saussure's specimens Avere from the Antilles. Off Tortugas 

 (Stimpson). 



The single small specimen, which I refer to Saussure's species, 

 without much doubt, was dredged on the Challenger Bank by the 

 party from the Biological Station, in 1903. 



In proportions and general appearance it resembles /*, Ponrtalesii, 

 with which it was at first thought to be identical by me and others. 

 The latter is not a Platylambrus. 



It differs considerably from Stimpson's original description* of 

 P. Ponrtalesii in the form of the rostrum, areolation, tubercles, and 

 form of the carapace, number and character of the marginal teeth 

 and of those on the chelipeds, etc. 



The principal references to P. Pourtalesii are as follows: 



Parthenope Pourtalesii (Stimp.). 



Lambrus Pourtalesii Stimpson, Bull. Miis. Comp. Zool., ii, p. 129, 1870. 



? A. M.-Edwards, Miss. Sci. Mex., v, p. 149, pi. xxx, figs. 2-2cl. In part, M. 



J. Rarhbun, Amer. Naturalist, xxxiv, p. 514 (fig. 11 copied from S. I. Smith's 



L. Verrillii). 

 'i Lambrus Verrillii Smith, Proc. Nat. Mus., iii, p. 415, 1881; op. cit., vol. vi, 



p. 14, 1883 ; Annual Eep. U. S. Fish Comm. for 1885, p. [24], pi. ii, fig. 2, 



1886. 



It should be noted that the figures given by A. M.-Edwards do 

 not agree very well with Stimpson's description.! M.-Edwards' 

 figures show a decidedly larger number of tubercles on the carapace; 

 more numerous lateral teeth; two, instead of one, large posterior 

 spines; more denticles on the chelipeds; a broader rostrum. It maj^ 

 well be doubled whether he really had the same species, unless his 

 figures are very incori'ect or the species remarkably variable. Our 

 specimen comes nearer to Stimpson's type, in some respects, than to 

 M,-Edwards' figures. But it agrees much better with Saussure's 

 figure. 



Prof. S. I. Smith, in 1881, described and figured J a very similar 

 form from deep water off the eastern coast of the United States, 

 under the name of X. Verrillii. 



* Stimpson's types of Crustacea were destroyed in the great Chicago Fire. 



f The description in Edwards' work is a mere translation of Stimpson's and 

 does not agree with the figiires. 



X This same figure has been used by Miss Rathbun, without credit, to illustrate 

 L. Pourtalesii (Amer. Natur,, xxxiv, p. 515, fig. 11). She considers the two 

 identical. 



