KEPORT ON THE ASIPHIPODA, 45- 



1779. FaBKICIUS, JoHANN CHRISTIAN. 



Reise nach Norwegen, mit Bemerkungen aus der Naturliistorie unci Oekonomie. 

 Hamburg, 1779. 



At page 247 Fabricius says, "Unter den Insekten ist nichts seltenes ; doch fand ich eine Menge 

 kleiner Krebse, in Weingeist aufbevvahrt, die in Norwegen unter den Namen Aat bekannt 

 sind. Dieses Aat scbwimmet in Sommer bey -warmer "Witterung in imendlicber Menge in der 

 See. Man kan keiner Eimer voll Wassers schopfen, obne Millionen dieser Thiere mit 

 herauszuzielien. Diesc sind es, welclie den Fischen, insonderheit den Heringcn, zur N.ihruiig 

 dienen, sie unter das Land locken, da sie ihnen immer folgen, wie der Wind und der 

 Strohm sie treiben. Dieses Aat oder diese Krebsarten scheinen daher wenigstens mit die 

 Ursache zu seyn, warum sowol die Menge der Fiscbe, als das Gluck der Fischereyen so 

 sehr vom Strohme und dem Winde abbangt. Icb beschrieb bier 



" Astacus Humari antennis posticis bifidis, corporis segmentis dorso subspinosis, caudae stylis 

 serratis. 



" Cancer dorso carinato, serrato, Stroem. Act. Hafn. x. pag. 5. tab. 2. 



" Cancer macrourus artioularis, dorso crenato serrato, spinis caudje bifidis, Miill. Zool. Dan. 197. 

 2358. 



" Hummer Aat Norvagis. 



" Magnitudine differt ; mox maior, mox minor invenitur. Antennae quatuor pedunculatae, 

 setacese posticse bifidae lacinia exteriors minora. Caput ouatum absque vllo rostro. Corpus 

 segmentis 13. vltimis dorso eleuatis, acutis, subspinosis. Pedes vnguiculati septem parium, 

 interne lamina magna, ouata, obtusa suft'ulti ; Natatorii trium parium apice fissi. Caudre 

 styli plures, serrati." 



This species Fabricius seems afterwards to have regarded as the type of his genus Gmnrnarns, 

 and since the references identify it with what has since been known as AmathiUa sabini, 

 Leach, with which the description fairly corresponds, there seems no reason for wthholding 

 from the specific name given by Fabricius its right of priority. The species should there- 

 fore be called Amathilla homari, Fabr. 



On page 258, after mentioning the occurrence of Gam/marus locusta in gi'eat numbers at small 

 dejjths, he describes : — : 



" Gamriiarus longicornis manibus adactylis, antennis corpore longioribus cauda obtusa. 



" Gammarus erassipes Gen. Ins. App. 



" Cancer erassipes Linn. Syst. Nat. 2. 1055. 8o. 



" Oniscus volutator Pall. Spicileg. Zoolog. fasc. ix. p. 59. tab. 4. fig. 9. 



" Astacus muticus, pede antico subulato, edentulo, longissimo, crassissimo Gronov. Zooph. 989. 

 tab. 17. fig. 7. 



" Paruus. Antenna; anticae breves subulatse, posticse porrectoe, crassse, corpore longiores. 

 Articulus secundus apice interiori vnidentatus. Corpus griseum, immaculatum. Pedes 

 trium parium adactyli. Cauda obtusa : lamella vtrinque vnica." 



Why he rejects the earlier specific names, he does not explain. In the synonymy he seems to 

 have used the word crasfipes twice by mistake for grossipies, misled perhaps by Gronov. See 

 Note on Pallas, 1766. What is meant by "Gen. Ins. App." I have not been able to 

 discover. It may refer to some appendix prepared but not published. In the Species 

 Insectorum, 1781, the reference is not repeated. 



On page 326, he says, " ITntef den grossen Meclusis Melt sich ein kleiner Gammarus auf, dor 

 mir noch gleichfaUs unbekannt war. 



" Gammarus viedusarum, manibus quatuor monodactylis, capite obtusissimo. 



^' Pulex cancriformis, Stroem Sundm. Tab. 1. figs. 12. 13. 



