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



Frisch's fresh-water forms being out of place. But, since under 1253 the reference to 

 the Iter Oel. and the word " rufescens " imply that the shrimp with the red blotches, of 

 the Olandska resa, p. 96, is in question, Boeck can hardly be right in calling it in one 

 place marinus and in the other locusta. 



1747. LlNN^US. 



Systema Naturae. Recusum et societatis, quae impensas contvlit, vsvi accommo- 

 datum curante Mich. Gottl. Agnethlero Saxone Trausilvano. Eclitio altera auctior 

 et emendatior. Halee Magdebvrgicse. do lo ccxxxxvii. 



For Cancer this fully agrees with the edition of 1740, and, as in the German edition of that date, 

 against "Gamarus" is placed "kleitiste Krebs mit langem Schwanz (SprLngkrebs)." 



1748. Linnaeus. 



Systema Naturae. Editio sexta, emendata et aucta. Stockliolmiae, 1748. 



In this, as in previous editions, the Animale Eegaum has six classes, the Insecta being the 

 fifth, which is divided into seven orders, of which the Aptera, " alje nullas," are the last. 

 This contains eleven genera, Pediculim, Pulex, Podura, Monondus, Acarus, Aranea, Scorpio, 

 Cancer, Oniscus, Seolopendra, Julus. " Cancer " contains eight species, Cancer, Pagurus, 

 Majas, Gammarus, Astaeus, Squilla, Eremita, Pulex aquaticus. ' Oniscus " has three, 

 Entomon pyramidale, Millepes, Asellus aquaticus. 



Cancer is defined as having "Pedes X : primores eheliformes. Oculi II. Ca.nda, foliosa." 



A copy of this edition was published Lipsioe, 1748. 



1749. Klein, J. T. 



Jacobi Theodori Klein Historiae Piscium Naturalis promovendae Missus quintus 

 et ultimus de Piscibus per branchias apertas spirantibus. Gedani, 1749. 



In the Fasciculus Septimus, on Callarias (Gadus, Morrhua, the Cod), he says, page 9, " Delec- 

 tantur Callarife squillis cinereis {prxlud. de crusfatis, p. 36) & pidicihua martnis ; Horum 

 meliores figuras superaddimus Tab. IV. f. A. naturalis magnitudiuis. C sub vitro auctus sed 

 pedibus mutilus, B vero exacte animalculum repriesentat." He then proceeds, with a 

 reference to " Eilianus Stobxiis (Act Suec. 1733. p. 79)," to retract the opinion exjaressed 

 in his earlier Prfeludium, "quod nullum insectum crustaceum, nedum KapKivtov Aristot. 

 exuvias suas deponat, neque cancri neque astaci marini." His figures evidently refer 

 to Gammarus locusta, although, as Boeck notices, the secondary flageUum is not given, 

 nor the eye correctly drawn. 



1751. LlNN^US. 



SHnska resa, p§, boga Ofverhetens befalluing forriittad §,r 1749. Stockholm, 

 1751. 



The Pulex fluviatilis which Linnisus found skipping about on the strand like a grasshopper, is 

 clearly, Boeck says, Orchestia littorea. It must therefore be distinguished from the Cancer 



