OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 281 



Albunea guerinii, Lucas. 



1758. (?) Cancer earabus, Linn., Syst. Nat , ed. 10, vol. i. p. 632 (reprint). 



1849. Albunea symnista, Lucas, Expl. Algerie, "Crust.," p. 27, pi. iii. figs. 2, 2a. 



1853. Albunea guerinii, Lucas, Rev. et Mag. Zool., ser. 2, vol. v. pp. 45-47, pi. i. figs. 9, 9a, b, b, c. 



1858. Albunxa guerini, Stimpson, Pr. Ac. Philad., p. 230 (68). 



J87S. Albunea guerinii, Miers, J. Linn. Soc. London, vol. xiv., No. 76, p. 327. 



In regard to this handsome species, Miers says : " It is possible that this is the 

 species described by Linnaeus (Syst. Nat., p. 1052) from the Mediterranean, under 

 the name of Cancer- earabus." Considering the locality and the unusually full 

 description which Linnaeus had given in the earlier edition of his Systema, it seems 

 even highly probable that his C. earabus is the species with which we are here 

 concerned. That the flattened eye-stalks, tapering to little black dots, should have 

 been mistaken for movable parts of a divided rostrum, is not so very surprising for 

 times when observers trusted much to unaided eyesight. From the typical species 

 of the genus A. symmysta (Linn.), 1758, the present is distinguished by the terminal 

 joint of the third perseopods, which is without the narrow linear lobe conspicuous in 

 the type. This deficiency, however, it shares with A. microps, Miers, and A. thur- 

 stoni, Henderson, from the Bast Indies. The Scotia specimen has a very small 

 rostral tooth in the central concavity of the frontal margin ; there are eight very 

 distinct teeth on either side of this margin, the outermost four being the largest, 

 and the one next the eyes being larger than the intermediate three. A strong spine 

 projects over the front border of the pterygostomian region, and a smaller one arms 

 the basal joint of the outer antennae. The three terminal joints of the third maxilli- 

 peds are ventrally and laterally carinate. The oval telson is dorsally grooved down 

 the centre nearly to the end, the apex being drawn out subacutely. Length of cara- 

 pace at centre 17 mm., at longest part 23 mm. ; breadth 23 mm. ; first antennae 48 mm. 

 long ; telson 7 mm. long by slightly over 4 mm. broad. 



Locality. — James Bay, St Helena, June 2, 1904 ; Station 499. 



Lucas in his fig. 9, 1853, shows a frontal margin with three little teeth near the 

 eye, and outside of these six larger ones, stating in his text that the teeth are " ordi- 

 nairement au nombre de neuf," in contrast to A. symmysta, in which they vary 

 between eleven and fourteen. The figure of a finger is marked 9b, and likewise the 

 figure of two pleon-segments with the uropods. 



Macrura genuina. 

 Tribe SCYLLAKIDEA. 



1893. Scyllaridea, Stebbing, Hist. Crust, Internat. Sci. Ser., vol. lxxiv. p. 191. 



Family Scyllaridje. 

 Genus Scyllarides, Gill. 

 1898. Scyllarides, Gill, Science, new ser., vol. vii. p. 98. 



