EEPORT ON THE AMPHIPODA. 29 



As Oniseormn cancriformium species, lie enumerates and describes, "1. Oniscus Pulex, compressus 

 ■pedibus quatuor anticis cheliformibus," with references to LinnKus, Frisch and Eoesel ; 

 " 2. Oniscus Locusta, compressus chelis nuUls; jjedilms secundi paris marcidis," with 

 references to Linnseus, Scopoli, Eay, and Dodonaeus, pempt. p. 476, and figure, Tab. XIV. 

 fig. 15, this being the Amphipod since known as Talitrus locusta, Pallas; " 3. Oniscus 

 Gammarellus, compressus pedibus secundi paris ei/eliformihtis maximis." " apud auctores 

 nusquam occurrit, meruitque ideo Tah. XIV. fig. 25. delineari," this being since known 

 variously as Ordiestia Uttorea or Orchestia gam,mareUus, the latter name having priority 

 beyond all contradiction. The next species is thus introduced : " Adfinis est Oniscis 

 mmriformibus singularis species, cui Onisci vohttatoris nomen dodi, quia in aquas superficio 

 singulari modo capite cum antennis prasvio volutatur. 



" 4. Oniscus volutator, suhcompressus, anteimis exteriorihus maximis. Astacus muticus, pede 

 utrinque antico subulato, edentulo, longissimo Gronov. Zooi^liylac. vol. II. p. 232. n. 989. 

 Oniscus bicaudatus Lin. Faun: svec. edit. 2. 71. 2062. Pulex marinus cornutus Eaj. 

 hist. p. 43. 



" Celeber. Geonovius ad banc speciem nomen meum citare dignntus est. Aliquot nempe Onis- 

 corum descriptiones & iconee in litteris olim communicaveram. Erant inter hos, quern supra 

 descripsi, 0. Locusta, & hie nunc describendus 0. volutator. Priorem vocaveram (non 

 Astacum crassipedem, sed Oniscmn (crassicipitem) cauda inflexa, pedibus secundi paris 

 tenuibus muticis. Hanc phrasin, nescio quo fato, ad 0. Vohdatorem, cui nullo modo 

 convenit, excitavit Vir celeberrimus. Monendum hoc fuit, ne incurise ipse accusarer a gnaris. 



" Oniscum, volutatoi-eni inveni olim in fossis maritimis, prope Harvicum Essexise. Gel. Geonovids 

 in fossis stagnantibus prope Leydam legerat. Tabulm nostra XIV. fig. 20. a latere visum 

 exprimit." 



The descriptions of the above species are given more fully in the Spicilegia Zoologica, Fasc. ix. 

 1772. 



1767. LlNN^US. 



Caroli a Linne Systema Naturge. Tom. I. Pars II. Editio Duodecima Refor- 

 mata. Holmise, 1767. 



The definition of Cancer now runs "Pedes VIII. (10 s. 6 ra7-o) insuper Manus 2 chelatte. Oculi 

 II, distantes, plerisque pedunculati ; elongati, mobiles. Palpi II, cheliferi. Cauda articu- 

 lata, inermis." The last division, with the same heading as in 1758-60, now contains twelve 

 species. Among these, at pages 1055-1056, are the following Amphipods ; No. 80, Cancer 

 grossipes, thus defined, " C. macrourus articularis, manibus adactylis longitudine corporis. 

 Gron. zooph. 989 Astacus muticus, pede antico subulato edentulo longissimo crassissimo," 

 the specific name grossipes, evidently based on the confusion made by Gronovius between 

 the antennse and gnathopods, being bound to yield to the earlier and more appropriate 

 volutator of Pallas, as explained in the notes on that writer, under the dates 1766, 

 1772; No. 81. Cancer pulex, said to occur both in salt and fresh water, and to judge 

 by the synonyms including, in Boeck's opinion, Gammarus index, Gammarus roei^elii, 

 and Gammarus locusta of later authors; No. 82, Cancer locusta, probably including 

 Oammarus locusta and Orchestia gammarellus, Linnoeus's remark about the uropods, "Pediculi 

 unius paris caudie lateribus adstant, bidigitati," not being very intelligible or decisive; 

 No. 83. Cancer linearis, which in Boeck's view is without doubt the same as Caprclla 

 lohata, Miiller, notwithstanding the reference to Martens's Caprella septentrionalis ; No. 

 84. Cancer atomos with " pedibus uudecim " and a reference to Baster, and the observation 

 "habitat in Europse aquis fiuctuantibus dulcibus, nudis oculis vix visibilis, praicedenti 



