64 THE VOYAGE OF H.M.S. CHALLENGER. 



ou I'absence des ailes, leur nombre, et leurs tegumens ; Falrririus, uniquement d'api'fes leurs 

 organes de la mastication on de la deglutition. Nous adopterons line methode combinee 

 d'apres ces trois points de vue, de nianifere a faire connoitre les classes etablies par ces trois 

 auteurs, et nous les subdiviserons jusqu'a ce que les reunions de genres nous pavoissent 

 entierement naturelles." This notice is followed by a chapter headed "Des insectes 

 pourvus de machoires, et sans ailes." In this order he includes — "A. Les crustaces, qui 

 oni plusieurs jmires de mdchoires. (AGONATA,^!!.}}!.)." " B. Les MILLEPIEDS, qui ont 

 le corps compose de bemirmip de segriiens, pmrtant des pieds, mais qui n'ont pas plusietirs 

 maclioires. (Mifosafa, Fabr.)." "C. Les ARACN^IDES : une seide piece pour la tete et le 

 corselet, pinrtant huit pieds; I'abdomen sans pieds. (UNOGATA, Fabr.)." "D. Les 

 PFITYREIDES : dtetedistincte; corselet portant sir jneds; ahd omen sans pieds." Section A. 

 comx^Yis&s— ''I. LES MONOCLES. (Monoculus)." "II. LES ECREVISSES. (Cancer)." 

 "in. LES CLOPORTES. (Oniscus, Lin.)." These divisions are again divided and sub- 

 divided, but in none is any reference of any kind made to the Amphipoda, a curious omi.ssion 

 on the part of an author on terms of intimacy, as he explains in his jDreface, both witli Fabricius 

 and Latreille. Among " LES ECREVISSES pnqm'ment dites. {ASTAGUS, Fabr.)," are 

 included "Ze homar. [Cancer gamniarus, Lin.)" and " La crereite ou saJicoque. (C. squilla, 

 Lin.)," two stalk-eyed Crustacea, in describing which, the names gammarus and crereite 

 might naturally have called Cuvier's attention to the se.ssile-eyed legion, especially as in 

 regard to the insects he says that Fabricius has helped him with the mouth-organs, " et, en 

 general, il a bien voulu parcourir toute cette portion de I'ouvrage, et m'aider de ses conseils." 



1798. Fabricius, J. C. 



Supplementum Entomologise Systematicse. Hafnige, mdccxcviii. 



In the preface Fabricius says " Agonatoriini classem imprimis et nomine et charactere e speci- 

 minibus bene conservatis ab amicissimo Daldorffio ex India orientali allatis mutavi, divisi 

 et classes magis naturales characteresque firmiores obtinui." He is here referring to Baron 

 Dagobert Carl de Daldorff. 



The Agonata no longer appear, but in their place Classis VIII. Polygonata, " maxilla; plures 

 intra labium," containing Oniscus, Lirjia, Lclotea, Cymothoa, and Monoculus ; Classis IX. 

 Kleistagnatha, " Maxillx plures extra labium os claudentes," the genera beginning with 

 Cancer and ending with Limuhis ; Classis X. Exochnata, " Maxilhe 2)lures extra labium 

 tectse palpis," the genera included being Albunea, Scyllarus, Palinurus, Palxmon, Alplieus, 

 Astacus, Pe7ixus, Orangon, Paguriis, Galathea, Squilla, Posydon, Gammarus. The old 

 definition of Gammarus is given, based only on the antennse ; and a single species, " Crammarus 

 Ilomari," is thus described : — " 15. Corporis segmentis dorso subspinosis, cauda fasciculata : 

 stylis serratis. Astacus Homari Ent. Syst. 2. 481. 10. Stroem. Act. Hafn. 10. 5. tab. 2. 

 Iklyll. Zool. Dom. 197. 2358. Habitat in Oceano Norwegico. Antenna? simplices baud 

 bifidae." These references to Strom and Miiller's Zool. Dan. prodr., as earlier notices have 

 stated, are probably concerned with Amatldlla Sahini, Leach, while " Astacus Homari," 

 Fabr., has apparently nowhere found admittance into the ranks of the Amphipoda. Milne- 

 Edwards and Spence Bate do not include it in their lists, Boeck definitely, de Skand. og 

 Arkt. Amph., p. 38, rejects it from his. But from the fact that Fabricius here singles it 

 out as an example of the genus Gammarus, it is not unreasonable to suppose that he had 

 changed his mind about its systematic position, especially as we find him adding the 

 remark, "antenna; simplices hand bifidse," as though to correct an error in his j^revious 

 description, which contains the expression, "antennis posticis bifidi.s." By antennis posticis 

 Fabricius apparently means the up>2Kr antennre, not, as might more naturally be supposed 



