REPORT ON THE AMPHIPODA. 57 



regarJ^es comnie des machoires. Elles sont au nombre de six, trois de chaqiie cuto. Elles 

 sont larges, applaties, un peu ciliues k leur extremity interne. 



"La I6vre inferieiire qui se trouve en-dessous, est longue, recourbue, et couvre presque touto 

 la bouclie. Elle est membraneuse, echancree, et terminee par deux petites antennules. 



" Les antennules sont au nombre de huit ; elles sont courtes, presque setac(Ses, et compos(5ee de 

 trois ou quatre articles peu distincts. Les deux anterieures sont inserees au dos des 

 mandibules. Les quatre qui suivent, ont leur attache au dos des machoires, et les deux 

 dernieres sout placees a I'extremit^ de la levre inferieure." 



The species are given as follows : — "1. Crevette ampoule, Gnmmarus anqnilla ; 2. C. foltoe, 

 G. nugax ; 3. C. cancelle, G. cancellus ; 4. C. longicorne, G. longkornis ; 5. C. sauteuse, 

 G. locusta ; 6. C. gammarelle, G. gammarellus ; 7. C. des ruisseaux, G. pulex ; 8. C. cornue, 

 G. corniger ; 9. C. lineaire, G. linearis; 10. C. saline, G. salinus ; 11. C. filiforme, 

 G. filiformis ; 12. C. marucageuse, G. stagnalis ; 13. C. bossue, G. gibbosics ; 14. C. appat, 

 G. esea ; 15. C. des meduses, G. niedusarum ;" all of which have been already discussed. 



Some of the subsidiary observations show that the author was not fully aware of the distinction 

 between the Orchestidse and the Ganimaridse, nor is any special criticism exercised upon 

 the synonymy. Faxon, Bibl. EmbryoL 1882, calls attention to his "observations on young 

 Gammarus, p. 183." 



1791. WuLFEN, Franz Xaviee, L. Baron von, died 1805 (Hagen). 



Dn. FEANCISCI XAVEEII l. b. de WULFEN Descriptiones Zoologicx Ad 

 Adriatici littora maris concinnatse. Nova acta physico-medica Academise Csesarese 

 Leopoldino-carolinge naturae curiosorum exliibentia Ephemerides sive observatioues 

 historias et experimenta a celeberrimis Germanise et exterarum regionum Viris 

 habita et communicata singulari studio collecta. Tomus Octavus. Norimbergaj, 

 Anno MDCCLXCi. ("Prasfatio" dated xxii. Jul. mdcclxxxxi.). pp. 235-359. 



From the subjoined account of " Cancer Pulex," it would seem that this author has carried to the 

 highest point the confusion of species under this title, which to his apprehension probably 

 included almost aU the Gammarina. At page 312, he gives : — 



"52. Cancer Pulex. 



" Cancer macrourus incurvus articularis compressus ; pedibus quatuordecim ; anticis duorum 

 parium subcheliformibus, rctractili-uncinatis ; stylis caud» bifurcis trium parium. 



" Cancer macrourus articularis, manibus quatuor adactylis, pedibus decern. Linn, Syst. N. T. I. P. 

 2. p. 1055. N. 81. HOsel, Ins. 3. Supl. Tab. 62. Busier. Subs. 11. p. 31. Tab. 3. fig. 7. 

 Geofr. Lis. IL p. 667. K 2. Tab. 21. fig. 6. FrMi. Ins. T. 7. p. 26. Tab. 18. fig. 1. 

 Scojiol. Ent, K 1137. 



"SquiUa Pulex. De Geer. Ins. 7. p. 193. K 4. Tab. 33. 



" Oniscus Pulex. Fabric. Faun. Groenl. p. 254. N. 231. 



"Cancer Locusta. Linn, Syst. N. T. I. P. 2. p. 1055. N. 82. Scojml Entom. p. 411. N. 1136. 



" Vulgatissimus ad maris littora sub kpidibus; adherens etiam passim Fucis Ulvis Spongiis. 

 In dulcibus item fluviorum lacuum stagnorum aquis frequentissimus. Non differt Cancer 

 Linnaei Scopoliique Locusta, ab eorumdem Cancro Pulice specifice. Magnitudine, colore, etc. 

 variat admodum. Vidi aquose virentem, excolorem alias, et transparentem, nunc album, jam et 

 aquose f uscescentem, subnigricantem interdum etiam ; communiter aquose grisescit ; exsicca- 

 tione plus minus flavens semper. Nunc non nisi tres quatuorve lineas est longus; alias octo, 

 decemve, pollicaris reperitur etiam, ac cum proportione magis, minusve corimleutus. Bini 

 quoque extimi caudse styU longiores quandoque, alias contra aJeo parvi, ut vixdum liberis 

 (ZOOL, CHALL. EXP. — PAET LSVII. — 1887.) Xxx 8 



