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



le cinquieme anneau de rabdomen doit etre lisse, a cependant ce segment garni d'un 

 faisceau d'epines ou de poils raides, comme sa Crevette ornee et comma notre Crevette de 

 Mores ; en sorte que ces espfeces doiveat etre placees, de moins quant h ce caractfere, dans la 

 meme division." He then proceeds to call attention to tbe appendages of the antennae 

 since called calceoli, which his species has in common with Gammarus ornatuK. The 

 characters by which he distinguishes the new species are in fact oidy the comparative 

 shortness of its upper antennae and magnitude of its first gnathopods. 

 In the Brit. Mus. Catal., Spence Bate comments on the fact that Guerin has figured the 

 mandible of Talitrus plafycheles, with a very minute appendage (see Note on Atlas to this 

 work, under date 1835). "This is a feature," Sp. Bate says, "that is absent not only 

 from the genus, but from the whole tribe of Saltatoeia." It will be remembered, how- 

 ever, that Savigny has likewise figured such an appendage for the mandible of Orchedia 

 moiifagui. In the Iconographie des Crustaces Guerin appears to have used Savigny's 

 figui-e of this mandible, and therefore his testimony is perhaps not independent. 



1832. SCHLOTHEIM. 



Merkwlirdige Versteinerungen aus cler Petrefactensammlung des verstorbenen 

 wirklicheu Geh. Eaths Freiherrn v. Schlotheim. ]\Iit 66 Kupfertafeln. Gotha, 

 1832. 



In this reprint at page 22 is mentioned in the description of Tab. xxii., " Fig. 8. a. Ii. 

 Trilobites problematic us. Aus den jiingern Schichten des zur Kupferschiefer- 

 formation gehijrigen Kalksteins bei Gliicksbrunn." The original figures are reproduced 

 on the plate named. 



1832. Zekker, Jonathan Carl. 



De Gammari Pulicis, Fabr. historia natural! atque sanguinis circuitu commen- 

 tatio. Accedit Tabula iEnea. Jenae, 1832. 



Zenker believes that Degeer "(quern vulgo De Geer falso scribunt) ", Gruithuisen, Mayer, 

 Wagner {Ids, 1832, in), had observed the circulation of the blood in Gammatiis pul&c 

 before him. 

 His section prior on the natural history of G. pulex, Fabr., begins with a " Conspectus generuni 



prsieipuorwn familix Squillarum, cui Gammarus noster adnumeranclus est." Thus : — 

 "A. Antennse quatuor 



"a) antennae inferiores baud in pedis modum effictse, pluries articulatse. 

 " aa) antennas superiores inferiores subsquales. 



" 1. PoUices manuum sic dictarum anteriorum 2-articulati : 



Corapiis et Leucotlwc. 

 "2. Pollices manuum anteriorum larticulati : 



Melita, Efirlifhus, Squilla, Phasmatocarcinus, AmphUlwii, Dexamiw., Gammarus ct 

 Pherusa. 

 " bh) antennse superiores inferioribus breviores ; 

 Orchestia, Talitrus et Atylus. 

 " h) antennae inferiores magnse pedum instar efformatae (pedatae), vix 4-articulat8e : 

 Corophium, Podocerus et Jassa. 

 " B. Antennas duie ; Phronima." 



