54 THE VOYAGE OF H.M.S. CHALLENGER, 



Labium triplex. Under this extensive genus " Cancer," in the groups of species correspond- 

 ing to the " Astaci Fabricii," is given, " homari. 155.," with references to Fabricius, Miiller, 

 and Stroem, and the observation " Habitat in Oceano norwegico, minutus" (p. 2987). The 

 epithet minutus would be inapplicable to AmatliiUa sahini as an Amphipod, but would very 

 well apply to it when grouped among the Astaci. It gives, therefore, an additional reason 

 for supposing that Astarus homari was originally misplaced. See the note on Fabricius, 

 1779 and 1798. Under the same genus "Cancer," the group of species headed 

 " a7itenni$ jiedunculatis »i7nplicissimis, Garamari Fabricii.," (p. 2991), includes, with the 

 addition of atomos and filiformis, the same list as that given, for Gammarus by Fabricius in 

 his Mantissa, 1787. The Linnean name grossipes is reinstated for the species Gam- 

 marus lonr/icomis. For "Cancer Pulex," besides the references in Fabricius, Spec. Ins., 

 the following are given " (7eo^V. ins. par. '2. p. G67. t. 2\. f. 7. CEchn. nov. act. Stoclih. 

 1782. II. 9. Hablizl ap. Pall. n. nord. Beijtr. 4. p. 396. Habitat freqtientissimus ad 

 Oceani littora, etiam in fontibus, fossis, lacubus adeo Sibirix salsis, dorso innatans, saliens, 

 inpriseium brancMis ulcera excitando jjiscibtis, et invisus retia desii'uendo piscatoribus inj^esttis, 

 a recurvirostra comestus, nodu lucens." After Cancer linearis. 83., is given " Atomos, 84. 

 C. linearis, manibus adactylis, pedibus undecim. Brit. zool. 4. t. 12. /. 32. Habitat in 

 Europae aquis Jluctuantibus dulcibus, nudo oculo vix visibilis, an vere a lineari distinctus?" 

 and " filiformis. 85. C. linearis, pedibus decern, mediis majoribus. Amren. acad. 6. p. 415. 

 n. 99. Habitat ill Malacca,, jK'llicis hmgitudine, debilis." For Cancer mediisarum reieTence 

 is made to " Fabr. sp. ins. 1. p. 378. n. 16. Oniscus (quadricornis) oblongus, stylis caud- 

 alibus senis,' antennis quaternis.," as well as to " Fabr. sp. ins. 1 p. 518. n. 12. mant. ins. 1. 

 p. 335. n. 13. Miill. zool. dan. prodr. 2355." and " ^Yroem sundm. 118. t. 1./. 12. 13. 

 Pulex cancriformis." 

 The genus 07iiscus contains tlie Amphipod, Oniscus ceti, 6. with references to Linnseus, Fabricius, 

 Degeer, Martens, Seba, Pallas, Egede, and the remark, " Habitat in Oceano boreali, balxnis 

 molestus, an hufus generis?" p. 3011. It contains also Lepechin's two Amphipod species, 

 Oniscus aculcafus, 26. p. 3013, and Oniscus cuspidatus, 28. p. 3014, and concludes with the 

 following notices, of which the first, not being an Amphipod, is only here inserted for the 

 sake of comparison with Turton's Linnteus : — 



" fuscus. 32. 0. fuscus, crusta carinata, macula thoracis alba. Milll. zool. dan. pjrodr. 2376. 

 Habitat in Dania. 



" Medusarum. 33. 0. compressiusculus, fronte obtusa, antennis brevissimis nutantibus, manibus 

 quatuor comprasso-incisis. Fabr. fn. rjroenl. p. 257. n. 232. Midi. prodr. zool. dan. 2355. 



" Stroem su7idm. I. 2>. 188. /. 1./. 12. 13. Cancer medusarum. 



" Habitat sub meduUae capillatse folimentis, 1 lineas longa. 



" Cicada. 34. 0. compressus subUnearis, manibus quatuor spuriis, antennis summis brevioribus, 

 caudfe dorso lajvi. 0. Fabr. fn. ijroonl., p. 258. n. 233. Habitat in mari Groenlandiam 

 aUuente, piotissimum ad ostia rivorum, 5 lineas longus. 



" arenarius. 35. 0. anterius depressiusculus, posterius carinato-subserratus, pedibus quatuor 

 auterioribus cheliformibus Ifevibus, antennis subaequalibus. O. Fabr. fn. fjroenl. p. 259. n. 

 234. Miill. zool. dan. prodr. 2358. Stroem act. Hafn. 10. t. 2./. 1-8. 



" Habitat in Groenlandiae littoribus arenosis, supira ulvam umbilicalem, cum 2 prxcedentibu^ et 3 

 insequentibus cancris, prxsertim pulici affinis. 



" Stroemianus. 36. 0. compressus, pedibus quatuor anterioribus cheliformibus subdentatis, 

 antennis summis brevissimis. 0. Fabr. fn. ijroenl.p. 261. ?«. 235. Milll. zool. dan. pyrodr. 

 2357. Stroem act. Hafn. Q.p. 588. t. 8. Habitat ad Groenlandiae littora, violaceus. 



" abyssinus. 36. 0. subcylindricus, pedibus quatuor anterioribus cheliformibus unidentatis, 

 antennis subojqualibus setiferis margine baseos interiore serratis. 0. Fabr. fn. ijroenl. p. 261, 

 n. 236. 



