REPORT ON THE AMPHIPODA. 55 



" Habitat in f undo maris Groenlandiam alluentis, supi'a ulvas inaximan, minimus, vix 4 lineas 

 longus. 



" serratus. 38. O ventricosus supra cariuato serratus, rostro corniformi deflexo, manibus duabus 

 spiiriis ; antennis sunamis longiorilius. U. Fain: fn. groenl. p. 262. n. 237. 



" Habitat in prof undis maris Groenlandiam alluentis, ex albo croceocfiie fasciatus, egregie in aqua 

 saltans, sxpius pronus natans, pedes, antennas, caudamque sub abdomine condens." 



In the foregoing list Oniscus ceti, as Liitken points out, is no longer confused with Pycnogonuvi. 

 On tbe other hand Cancer- " medusarum " and Onisais " Medusarum " are curiously entangled. 

 Although they are retained in different genera, the same references to Midler and Strom are- 

 given for both, except tliat in regard to Strom, by an obvious slip, "p. 118" appears in one 

 reference and "p. 188" in the other. At the same time, to the second of these references 

 the words " Cancer medusarum" are added, pjrobably to warn the reader that if the last six 

 species of Oniscus, prssertim pulioi aflines, should be transferred to the Gammarus-giovcp, 

 Oniscus Medusarum would then become one with Cancer medusarum. Bovallius now 

 distinguishes them by calling the Oniscus in question " Hyperia Kroeynri," while the 

 Cancer is named Hijperia medusarum, 0. F. Mliller, 



1789. RcEMER, JoHANN Jacob, born 1761, died 1819 (Hagen). 



Genera Insectorum Linnfei et Fabricii iconibus illustrata a Johanne Jacobo 

 Roemer. Vitoduri Helvetorum, mdcclxxxix. 



In the Systema Linnasi here given the Aptera are on pages 32-36, not including any Amp)hipoda. 

 In the Systema Fabricii, the Agonata, pages 61-63, include "i37, Gammarus, antennx 

 quatuor simplicissimse pedunculate : anticx breves subulatse : posticx setacese. Longicornis, 

 Fabr. Sp. Ins. I. p. 516, n. 4. Manibus adactylis, antennis corpore longioribus, cauda 

 obtusa. Tab. xxxiiL f. 6. Habitat in Europoe oceano." Tin&is Coropliiumvolutator,Va\\. 

 The Antliata, pages 82-86, include "193, Pycnogonum, Haustellum tubulosum, conicum, 

 absque setis, Paljnduo ad basin haustelli. Balanarum., Fabr. S. Ent. 810, 35. Sp. Ins. 11. 

 p. 475, D. 1. Plialangiurii Linn. Pediculus Fabr, in Syst. Palpis duobus, corpore ovato. 

 Tab. xxxvi. f. 17. Habitat in Oceano Norwagico." The figure is obviously borrowed 

 from Briinnich, although that author is not mentioned. In the figures of C>/amus by 

 Martens, Egedo and Adelung, the head is represented pointing downwards, as though the 

 artists did not know which was the head and which was the tail, since the general rule 

 in older, as well as in recent, times is to give vertical figures with the heads uppermost. 

 Briinnich figures his Pijcnogonum head downwards, perhaps for purposes of comparison 

 with the old figures of djamus, since he at any rate well knew the structure of the creature 

 he was drawing. 



1789. MiJLLER, Otho Fridericus. Abildgaard, Peter Christian, bom about 1740, 

 died 1808 (Nouvelle Biograpbie generale). 



Zoologia Danica seu Animalium Danise et Norvegise rariorum ac minus 

 notorum Descriptiones et Historia. Volumen tertium explication! iconum fasciculi 

 tertii ejusdem operis inserviens. Auctore Othone Friderico Miiller. Descripsit et 

 Tabulas addidit Petrus Christianus Abildgaard. Havnise, mdcclxxxix. 



He figures, pi. ci., and on pp. 33-34 describes, Gawmariis jmdatus, "Gammarus linearis corpore 

 articulis sex, pedibus quatuordecim unguiculatis ultimis quatuor longioribus, cauda nulla 



