10 



THE VOYAGE OF H.M.S. CHALLENGER. 



directs antrorsum extendit ; ad quamm radices alias duse, multf) breviores. Corjras fere 

 pellucidum, celerrimfe movetur saltando ut Pulex, sed praecipufe extra aquam. Pedum 

 secundum par chelarum instar latum. Inter pedes et caudam aUa sunt sive Appendices, 

 sive pedes, graciles et breves quibus ova adhferere probabile est ut in Locustis. Cauda 

 cirrorum fascicule constat. In litoribus sub lapidibus innumer^ inveniuntur. 



" Pulex fluviatilis, q. An h marino differat. F. W. Pedum quinque paria posteriora longa et 

 gracilia sunt, duo capiti proxima breviora, non chelis sed (ni fallor) bamulis donata, ut in 

 Squillis. Juniores matribus adliserent, quae in circulum ferfe se contorquent, et puUos 

 amplectuntur. A capite duo procedunt Anteunarum paria. Quae in nostris rivuHs sunt, 

 non saltant ut marinoe, sed incurvant se et natant podicem exerendo satis celeriter. Hoe in 

 aquis calidis in specu Custozx prope Vincentiam in Italia inveniuntur, ubi nulla animalia 

 vivunt." 



Of these tbree notices the first probably refers, as pointed out by Pallas himself, to Oiiiscus vohifator, 

 Pallas, 1766; the second, to judge by the short upper autenuEe, the large-handed second 

 feet, and the saltatory motion, especially out of water, no doubt principally refers to Oniscus 

 gammarellus, Pallas, though the attendant query implies that sjsecies of Gammarus were 

 also in view ; the third notice evidently includes two species, that from the warm springs 

 of Custoza in Italy being, Boeek says, Gammarus pungens, while the other is obviously 

 the common fresh- water Gammarus pulex. 



1728. Feisch, Johann Leonhard, born 1666, died 1743 (Hagen). 



Besclireibung von allerley Insecten in Teutschland, Nebst nutzliclien Anmerck- 

 nngen Und nothigen Abbildungen Von diesem krieclienden und fliegenden luland- 

 isclien Gewurme, zur Bestatigung und Fortsetzung der Grimdliclien Entdeckung, 

 So einige von der Natur dieser Creaturen lierauso-egeben, und zur Ergantzuns; und 

 Verbesserung der andern. Siebender Tlieil. Samt einer Vorrede, darinnen von 

 Ulyssis Akirovandi Buch von den Insecten ausfuhrliebe Meldung gescbicbt. 

 Berlin, 1728. 



In part vii., section xviiL, page 26, is headed "Vom Krebs-formigen Wasser-Wurm." Of 

 this he says, " Der grosste mrd etwan ZoU-lang die Ubereinkunfft mit Krebsen, der 



Gestalt nach, leidet gar wohl, dass man ihm 

 davon einen Nahmen giebt, weiler noch keinen 

 hat. " With the longer upper antennae he thinks 

 it feels what is in front of and beside it, with 

 the smaller lower ones it feels what underneath 

 might do it harm or supply it with food. 

 He concludes that it cannot be one of the 

 insects which undergo further transformation. 

 Its fresh-water habitat, and the figures which 

 Frisch gives, justify Boeck's opinion that 

 Gammarus pulex is here in question. It is 

 The whole plate is reproduced in the accom- 



Fig. 



depicted on pi. xviii. figs. 1, 2, 3. 

 panying woodcut. 



