OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 30 1 



carapace and telson of these juvenile forms. It still carries the obliquely upward- 

 pointing medio-dorsal spine not far from the hind margin of the carapace, this being 

 a spine which has disappeared from the E. palliatus stage. Nearly equal to it are 

 the medio-lateral spines, the position of which is noted as distinguishing these 

 larvae from those of Lysiosquilla scabricauda (Lamarck). In a strictly balanced 

 dorsal view they are not visible. The narrow part of the rostrum is subequal in 

 length to the postero-lateral spines, about 4 mm. in each case. The under margin 

 of the rostrum has three microscopic spinules, the middle one the largest ; its apical 

 portion is finely serrate on both sides. Adjacent to the eyes is a very small tooth 

 on each side, behind which the carapace widens considerably. A minute denticle 

 points inward from the base of each postero-lateral process, and between these the 

 pleon is clear of the carapace from the third segment. The postero-lateral angles of 

 the fifth pleon segment are acute, as are those of the telsonic segment, of which 

 the hind margin is finely pectinate and fringed with about forty tiny spinules, its 

 centre indented ; the sides have each two teeth, which in this specimen are micro- 

 scopic. The slender, strongly geniculate first maxilliped is minutely chelate, the 

 small thumb having the inner margin distally finely denticulate ; some of the spines 

 on the hand are pectinate. 



Locality.— Lut. 19° 59' N., long. 23° 34' W. ; Station 18. 



ISOPODA EPICARIDEA. 



Family Bopyrid^. 

 Genus Bopyrina, Kossmann. 



1881. Bopyrina, Kossmann, Zcitschr. Wiss. Zoo/., vol. xxxv. p. 666. 

 1900. „ Bonnier, Trav. zool. Wimereux, vol. viii. p. 364. 



Bopyrina latreuticola (G-issler). 



1845. Bopynis squillarum, Goodsir (not Latreille), Ann. Nat. Hid., vol. xv. p. 75. 



1882. Bopyroides latreuticola, Gissler, American Naturalist, vol. xvi. p. 591, text-figs. 6-8 on p. 593. 



1895. „ „ H. J. Hansen, Ergebn. Planldon-Exp., " Isop.," p. 44. 



1900. Bopyrina latreuticola, Bonnier, Trav, zool. Wimereux, vol. viii. p. 370, text-fig. 61, a-c (from 



Gissler). 

 1913. Probopyrus latreuticola, Tattersall, Tr. R.S. Edinb., vol. xlix. part iv. p. 391. 



Bonnier says: "This genus is characterised, in the female, by the absence of 

 pleural plates on the pleon, the rudimentary state of the pleopods, of which the last 

 pairs have disappeared, as also the uropods, which, however, are still visible in the 

 male." Of the species here named no males were discovered. The female is less 

 than 2 mm. in length, with the protuberance on one side near the end of the peraeon, 

 as delineated by Gissler. 



For the locality see under Latreutes fucorum, p. 291. 



TRANS. ROY. SOC. EDIN., VOL. L. PART II. (NO. 9). 42 



