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



certainly tbe female, and Cerapus dlfformis is probably the male in a less advanced stage, or 

 possibly a form assumed between the pairing seasons. The account given by Gosse of 

 the tubes of his "Cerapus Whitei" taken at Ilfracombe (see Notes on Gosse, 1853 and 

 1855, and Brit. Sess. Crust., i. p. 468) induces me to suppose that his species ought not to 

 be referred to SiphoiKecctes but to be made an additional synonym of Ericldhcmius 

 diffwmis. 



Dryope irrorata, Sp. Bate, and Drijope crenaiipalmata, Sp. Bate, are entered as separate species, 

 but recognised as " deux formes tres voisines." The fact that they were dredged together 

 tends to confirm my opinion that they are forms of a single species. 



In the Second Part, M. Chevreux gives, he says, " un resume de tous les documents que j'ai pu 

 reunir sur la repartition geographique des Amphipodes de nos cotes." In the notes he 

 observes that Sp. Bate has not described any species of the name Iler/amaera suhserrulata, 

 as in Grube's list from Saint- Vaast-la-Hougue, 1 869. Grube nu doubt intended the species 

 Megamsera semiserrata, Sp. Bate. Of the existence of the true Mierodeutopus anomalus on 

 the French coasts M. Chevreux is not certain ; but in regard to the females of the genera 

 Microdeutoptis, Aora, and Stimpsonia, he promises soon to publish differentiating characters, 

 based on the examination of living specimens at the moment of reproduction. 



In "la liste des Amphipodes recueillis sur le littoral des Alpes-Maritimes parM. Adrien DoUfus," 

 two new species are included: — ^' Sieitothoe DoUfad n. sp.," thus described: — " Anfemix 

 pradongafx, siihsequales ; etiam inferiores flagellum elongatum gerentes. Pedes 2di paris 

 manii elongata, p>lus quam duplo longiore quam lata, pahna vcdde excavata, in parte 

 anteriore dentibus duohus instrucfa (fig. 8)," on page 10 of the text. 



" Guernea leevis n. sp." thus described : — " G. coalit£e valde affinis, sed carina segmentorum 

 abdominis duorum posteriorum non denticulata differf." If there be no other distinction 

 between the species than that here mentioned, I should be inclined to regard Guernea 

 laevis as a synonym of Guernea eoaUta. 



The " relev(5 gi5neral de nos espfeces de la MMiterranee " includes the names of 75 species, 

 beginning with " Vibilia Jeangerardi Lucas " and ending with " Cyamus ceti." 



The " Distribution geographique et batbymetrique " is given in a tabular form, the " liste des 

 espfcces marines signal^es sur les cotes de France " in this table numbering 174. As to the 

 bathymetric distribution M. Chevreux says, " Enfin, le fait le plus frappant est la capture 

 par V Expedition Norvegienne 1876-1878, de V Hippomedon HoJboUi, drague par 1215 

 brasses (2284 m.) de profondeur. Cette forme ne diffore de celle qui habite les fouds de 5 

 a 10 m. de la bale du Croisic que par I'absence des organes de vision." He remarks in a 

 note that adult specimens of Podocerus falcatus, AmjMthoe rubricata, and Pruto ventricosa 

 coming from depths of 80 to 100 m. are much smaller than shore-specimens; but this 

 observation cannot, I think, have any very general application. 



The "Index bibliographique " contains sixty-six entries, beginning with Risso, 1816, and ending 

 with J. de Guerne, 1887. 



1887. ClAUS, C. 



Die Platysceliden. Mit 26 lithographirten Tafeln. Wieu, 1887. 



The preface notices that hitherto sufficient attention has not been paid to sexual dimorphism 

 and metamorphosis occurring in the Hyperina, and that accurate details in regard to the 

 mouth-organs and inner structure of the Platyscelidse have been entirely wanting. 



The description of families, genera and species, pages 30 to 75, corresponds closely with that 

 already published by Clans in 1879 ; see Note on Clans under that date. But the value of 

 that description is here enormously increased by the addition of the beautifully executed 

 and highly instructive plates. 



