Report on the Malacostraca, Pycnogonida and some Entomostraca. 515 



In addition to the adult animals, the Danmark Expedition also 

 brought home 4 developmental stages of prawns, but, unfortunately, 

 of each stage there is only a single, in some respects imperfect 

 specimen. I have nevertheless thought it right to describe these 

 specimens, as we know developmental stages of the following 

 Greenland prawns only. 



Dijmas typus (Krøyer: Naturh. Tidsskrift, 3. R., vol 1, 1861, p. 63) 

 is a Mysis stage, though we do not know to what species it belongs; 

 in the Copenhagen Zoological Museum there are some fragments of 

 the specimen dissected by Krøyer, but figures of them do not exist, 

 though Krøyer writes (1. с p. 72) : "Figurae, quaadDymantatypum expla- 

 nandum confectae sunt, cum fasciculo hujus libri proximo apparabunt". 



Sclerocrangon boreas : G. O. Sars: Bidrag til Kundskaben om 

 Decapodernes Forvandling. III. Crangonidae. Archiv f. Math, og Na- 

 turvid., 1890, p. 180, PI. 6, figs. 14— 31. 



Sclerocrangon ferox : Wollebæk: Le développement du genre 

 Sclerocrangon. Bergens Museums Aarbog 1906, No. 11, 2 pi. — and 

 Koelbel, Crust,, Pycnog. u. Arachn. von Jean Mayen. Die Inter- 

 nationale Polarforschung 1882 — 83. Die oesterreichische Polarstat. 

 Jean Mayen, Beobacht. Ergebn. vol 3, 1886, p. 51, PI. 4, figs. 1—12. 



Pontophilus norvégiens G. О. Sars, 1. с. 1890, p. 160, PI. 4. 



Sabinea sepiemcarinata G. О. Sars, 1. с. 1890, p. 168, PI. 5, pi. 6, 

 figs 1 — 13. The Mysis stage is described under the name of Myto 

 Gaimardii by Krøyer in Naturh. Tidsskrift, Ny Række, vol 1, 1844, 

 p. 470 and 3. Række, vol 1, 1861, p. 63, 69, 73—75 and figured by 

 Krøyer in Gaimard, Voyage en Scandinavie, Crust., 1846, PI. 7, figs. 1. 

 it is erroneously referred by H. J. Hansen (1887, p. 53) to Sclero- 

 crangon boreas. 



Spirontocaris polaris, embryo. Krøyer: Monografisk Fremstill. SI, 

 Hipp., Kgl. Danske Vid. Selsk. math, naturvid. Afh., vol 9, 1842, 

 p. 245, PI. 6, figs. 120—132. 



Pandalus borealis and P. Montagui G. O. Sars, Account of the 

 postembr. develop, of Pandalus borealis with remarks on the devel. 

 of other Pandali. Report on Norwegian Fishery and Marine Invest., 

 vol 1, 1900, No.3,p.6, Pl.l— PI. 7, figs. 1—3 and p. 23, PI. 7, figs. 4— 11, 

 PI. 8, figs. 1—2. 



Acanthephyra purpurea Coutière, Bull. Mus. Océanogr. Monaco, 

 No. 70, 1906, p. 12—20, figs. 5—7. — Kemp, Decap. Biscayan Plankton, 

 XI, Transact. Linn. Soc. London, ser. 2, Zool., vol 10, 1907, part 8, 

 p. 206, PI. 14, PI. 15, fig. 1. 



Pasiphae tarda Björck : Bidrag till Kännedomen om Decapo- 

 dernas larvutveckling, I, Passiphæa. Arkiv for Zoologi, vol 7, no. 15, 

 1911, p. 4— 17 (with figs), 1 PI. 



