REPORT ON THE AMPHIPODA. 65 



the lower. Amathilla sabim', it is true, has an accessory flagellum on the upper autennfe, 

 but of that feature Fabricius took no notice in his definition of the genus Gammarus. 

 On page 570, in Classis XIII. Antliata, " Os haustello inarticulato," the genus Pycnogonum 

 is given and defined as having " Haiistellum tubulosum, conicum absque setis. Palpi ad 

 basin haustelli." The only species mentioned is Pycnogonum ceti, with Cymothoa ceti, 

 Ent. Syst., and Onisais ceti, Linn., as its synonyms. In the Systema Antliatorum, 1805, 

 Pycnogoiium no longer appears. 



1799. Odmann, Samuel {alias Odman). 



De Cancro Pulice, Linn. Gammaro, Fabr. (Svet. Grundmargla.) et noxa, quam 

 retibus piscatorum infert, experimenta olim instituta communicat Samuel Odmann. 

 jS^ova Acta regise Societatis Scientiarum Vpsaliensis. Vpsaliae, mdccxcix. 



On the much disputed question whether the Crustacean in question does or does not injure fishing 

 nets Odmann pronounces most decidedly that it does, on the ground of repeated experi- 

 ments. With equal decision he denies that it attacks live fish. " Ipsos autem a piscibus 

 minoribus copiose deglutiri, in culina discitur quotidie. Prje primis vero generi anatino 

 sapidas exhibent dapes." He says that at the beginning of November they come in from 

 the deeper sea to the sheltered parts of the shore in incredible numbers, and that it is from 

 then till May that their destructive industry chiefly needs guarding against by steeping the 

 nets in a decoction from the bark of the alder {Betnla Alnus). In January and February he 

 repeatedly saw the Sturnus Cincliis spend the morning hours, from 7 to 10, in catching 

 those Gancri Pulices before his windows in the island of Ingar6. 



Y^QQ CuviER and Dumieril. 



Lecons d'anatomie comparee, torn i. Paris, An viii. 



The tableau septieme of this work, as quoted by Desmarest, Cons, gen., 1825, shows " Crustac^s. 

 Classe VII". AnLmaux invertebres, ayant des vaisseaux sanguins, une moelle epiniere noueuse, 

 et des membres articules," including "1. Monocles. Limulus, Caligus, Apus, Cyclnpfi, 

 Polyphemus. 2. Ecrevisses. Cancer, Inachus, Pagurus, Astacus, Palimirns, /Scyllaru,", 

 Squilla." These are followed by "Insectes. Classe VHP. Animaux invertebres, d^pourvus 

 de vaisseaux sanguins, ayant une moelle epinifere noueuse, et des membres articules," of 

 which section A are provided with "machoires." Of these a subsection are "sansaUes," 

 one division of which are " GNATHAPTiRES. Plusieurs paires de m3,choires," containing the 

 " PoLTGNATHES. Asellus ou Physodes, Oniscus, CymotJioa." 



On this classification MUne-Edwards, Hist. nat. des Crust., i. p. 207, observes that the progress 

 of science has withdrawn the Polygnathes from the Insecta, and has necessitated the 

 employment of additional characters to distinguish the Crustacea from the Arachnida, which 

 also have blood-vessels. 



1801. Pallas, P. S. 



Bemerkungen auf einer Reise in die siidlichen statthalterseliaften des Russischen 

 Reichs in der Jabren 1793 und 1794. Zweyter Band. Leipzig, 1801. 



Of Crustacea in the Crimea he says, page 475, "in den Fliissen endlich hiiufige Krehse von 

 gutem Geschmacke, und in der See zwey Arten von Taschenkrehsen, deren die eine im 



(ZOOL. CHALL. EXP. — PART LXVII. — 1887.) XxX 9 



