16 THE V^OYAGE OF H.M.S. CHALLENGEE. 



1754. LlNN^US. 



Museum Eegis Adolphi Suecorum, &c., iu quo animalia rariora, imprimis exotica, 

 quadrupedia, aves, amphibia, pisces, insecta, vermes describuntur et determinautur. 

 Stockholm, 1754. 



The Onisciis ceti may be, Liitken thinks, the Gyamus which lives on Balxna mysticetus. He 

 quotes the description from p. 89, " Oniscus ovalis, segmentis excepto secundo in medio 

 inteiTuptis ('med afbrutna leder '). Caput parvum." " Antennae 2, singulae articulis 4j 

 corpus ovale, magnitudine Ricini, sectum segmentis 7, Lnterruptis in medio, excepto solo 

 secundo. Pedes paribus 7, quorum 1 minutum sub capite, 2 crassius ovatum, 3 & 4 

 mutica, 5, 6, 7 ovata, uucinata." Seba's figure is referred to. The statement that the 

 segments, except the second, are interrupted in the middle, Liitken considers rather 

 obscure. It seems to allude to their being articulated to one another only by the central 

 portion, while between the first (cephalothoracic) segment and the second segment there 

 are no such lateral interspaces. 



1755. E6sEL VON RosENHOF, AuGUST JoHANN, bom 1705, died 1759 (Biographic 

 Universelle). 



Der monathlich-herausgegebeneu Insecten-Belustigung Dritter Theil worinnen 

 ausser verschiedenen, zu den iu den beeden ersten Theilen enthaltenen Classen, 

 gehorigen Insecten, auch mancherley Arten von acht neuen Classen nach ihrem 

 Ursprung, Verwandiung und andern wunderbaren EigenschafFten, aus eigener 

 Erfahrung beschrieben, und in sauber illuminirten Kupforn, nach dem Leben 

 abgebildet vorgesteUet werden von August Johann Eosel von Eosenhof. 

 Nurnberg, 1755. 



He accepts Linnseus's classification of the Crustacea with the Apterous Insects, for the additional 

 reasons that, like insects, they have no bones, that their mouths open and shut not from 

 above and below but from side to side, that they cannot shut their eyes, and that their 

 breathing is not through mouth or nose but through lateral openings in the body (p. 306, 

 mis-pagination for p. 308). Pages 351-357 describe " Die kleine Garneele unserer Fliisse. 

 Tab. LXIl." From its agreement with the marine Garneele, Eosel thinks that the 

 little river shrimp would fitly be called die kleine Flusgarneele, and as the Garneele is 

 called Squilla in Latin, he explains that the inscription Astacus fluviatilis on his plates Ixii. 

 and Ixiii. ought to read Squilla fluviatilis for pi. Ixii., and Squilla marina for pL Ixiii. 

 He carefully observed the habits and structm-e of his specimens of the former, which 

 cannot be confused with Gammarus pulex, if any trust is placed in Rosel's statement, 

 " Vom Leib ist solche ziemlich schmal, und diesen bedecken vierzehen Schuppen, von 

 welchen die sieben hintersten oder letzeren, mitten auf dem Rucken mit rothen scharfen 

 Spitzen versehen sind, welche, wenn sich die Garneele kriimmet in die Hohe gehen und 

 hervorragen." Burgersdijk, who discusses the synonymy and characteristics of Gammarus 

 pulex with great fulness, retains the name Gammarus roeselii, first given to Rosel's species 

 by Gervais in 1835, but there seems no adequate reason for rejecting the specific name 

 fluviatilis given by Eosel himself. 



