6 c. BOVALLIUS, NOTES ON PTERYGOCERA AKENAKIA.. SLABBER. 



12) Annals and Magazine of Natural History. Second series. Vol. XIII. 

 London 1854, pag. 504. 



13) Report of the twenty-fifth meeting of^^tlie British Association for the 

 advancement of science, held at Grlasgow 1855. London 1856, pag. 18 

 pl. 13—21. 



14) Annals of Natural History. Second series, Vol. XIX, 1857, pag. 140. 



15) Transactions of the Tyneside Nat. Field Club. Vol. IV, pt. 1, pag. 15, 

 pl. 2, fig. 2. 1858, teste Sp. Bate. 



16) C. Spence Bate. Catalogue of the specimens of Amphipodous Crustacea 

 in the coUection of British Museum. London 1862, pag. 112, pl. 18. 



17) C. Spexce Bate and J. O. "Westwood. A History of the British Sessile- 

 eyed Crustacea. Vol. I, pag. 189. London 1863. 



18) James D. Daka. On the classification of the Crustacea Choristopoda or 

 Tetradecapoda. American Journal of Science and Arts, cond. by B. 

 SiLLiMAN, B. SiLLlMAN J:r and J. D. Daxa. Second series, vol. XIV. 

 New-Haven 1852, pag. 309. 



19) United States' Exploring Expedition during the years 1838, 1839, 1840, 

 1841, 1842, under the command of Ch. Wilkes. vol. XIII, Crustacea, 

 by James D, Dana 1852. Part. II, pag. 833, 844 and 1441. 



20) Ph. H. Gosse. A Manual of marine Zoology for the British Isles. Part. I. 

 London 1855, pag. 142, fig. 264. 



21) A. White. a populär History of British Crustacea, London 1857, 

 pag. 174. 



22) Axel Boeck, Crustacea amphipoda borealia et arctica. (Sserskilt af- 

 trykt af Vidensk.-Selsk. Forhandlinger for 1870.) pag 57. 



23) AXEL Boeck. De Skandinaviske og Arktiske Amphipoder. Christiauia 

 1872—75, pag. 222. 



Subfamilia; Pterygocerinae n. 



Cephalon rostrum ferens minimum, articulum primum anten- 

 narum non tegens. 



Labium superius breve, apice rotundatum. 



Mandibulse magnae, palpo elongato, articulo palpi secundo tertio 

 longiore. 



Maxillse primi paris parvas, palpo biarticulato. 



Pedes maxillares palpo laminari. 



AntennaB superiores flagello appendiculari iustructae. 



Gnathopoda primi paris dactylo unguiculato, secundi paris 

 dactylo minimo duplici. 



Pereiopoda primi et secundi pari articulis ultimis ligulas 

 formantibus. 



Pereiopoda sequentia dactylis carentia. 



