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



monodactijle. Genns III. Dexamine. ' Four anterior feet nearly equal ; hands sub-ovate, 

 compressed and filiform," type species Dexamine spinosa, Montagu ■ "* * Auierior pair of 

 feet didadyle; second pair monodadyle. Genus IV. Leucothoe." 



" Family III. Gammabid^. Last joint of the antennae composed of several minute articula- 

 tions ; upper pair longest, four-jointed ; under ones five-jointed," -with three sections, 

 "* Second pair of feet larger than the first, with a compressed hand. Genus V. Melita," 

 " Genus VI. Maera." " * * Four arderior feet nearly equal in size and form with ovate 

 hands. Genus VII. Gammards." "Genus VIII. Ampithoe. superior antenn;e, without 

 a seta at the base of the last joint ; back of the tail without fasciculi of spinules." 

 it* * * Four anterior feet with a filiform hand. Genus IX. Pherusa," left otherwise 

 without definition, the type s'peciea Pherusa fucicola receiving this description: — "Colour 

 whitish, nuttled with reddish. Found on the rocky shores of Devon, under stones at low 

 tide, on fuci." 



" Family IV. Podoceridje. Superior antennse shortest four-jointed, the last joint solid or 

 obscurely articulated ; inferior antennae five-jointed, with the last joint solid, or very 

 obscurely articulated." In the first section, " * Superior antennx very short, the last joint 

 comp>osed of many minute articulations," he places " Genus X. Corophrium {i.e., Coro- 

 phiumY ; in the second, "* * Superior antennx shorter than the under ones; the last 

 joint scarcely articulated," he places "Genus XI. Podocerds," "Eyes hemispherical and 

 somewhat prominent; four anterior feet didactyle, anterior pair smallest with an elongate 

 sub-ovate hand ; second pair with an ovate hand, and the internal side nearly straight," 

 type-species, Podocerus variegatus ; "Genus XII. Jassa, eyes not prominent; four anterior 

 feet didactyle with ovate hands ; the anterior pair smallest ; the hand of the second pair 

 with the internal edge furnished with teeth," with two species, Jassa pulchella, var. a, 

 var. /3, and Jassa pelagica, both these species being referred to as already established in 

 the genus lassa. Leach, " Mem. Wern. Soc. vol. ii." He adds that " Cancer gammarus 

 fcdcattis of Montagu, Lin. Trans, vol. ix. tab. 5. fig. 2. seems -referable to this genus." 

 Modern opinion groups all the four last-mentioned species under the name Podocerus 

 falcatus, Montagu. Jassa or lassa would claim priority as the generic name, only that there 

 seems to be nothing in the Mem. "Wern. Soc. corresponding to Leach's reference. Tribe 

 III. Phroximarides, only contains the genus Plironima. Of Tribe IV. Caprellides, 

 Leach says, " This includes our family Caprellini, to which we can add another genus, 

 differing from Caprella in having true legs instead of the gelatinous fine [fin] -like legs, 

 which is named Gen. Proto. Sp. 1. Pedata. Cancer gammarus pedatus, Montagu, Linn. 

 Trans, vol. xi. p. 6. tab. ii. fig. 6." This is Proto ventricosa, 0. F. MiUler. 



1814. The Entertaining Magazine ; or, Eepository of General Knowledge, &c. By the 

 Most Celebrated Modern Authors. Vol. II. London. Preface dated Dee. 

 31, 1814. 



The Article "Animal Biography" concludes in July 1814, on page 354, with giving in Class V, 

 Insecta, " Order VII. Aptera, or insects without wings. The genera are : — 1. Podura, 

 spring-tail. 2. Pediculus, louse. 3. Pul.ex, flea, chigger. 4. Acarus, tick, mite. 5. Aranea, 

 spiders. 6. Scorpio, Scorpion. 7. Cancer, crab, lobster, crawfish, shrimp. 8. Monoculus, 

 water-flea. 9. Ortj'scz«, wood-louse. 10. /ScoZopewdra, centipede." This contribution, " by 

 the most celebrated modern authors," or some one of them, is a high compliment to the 

 enduring influence exercised by Linnjeus, whose earliest views on this portion of the animal 

 kingdom are here reproduced, in spite of all that had been done in the interval by his 

 distinguished successors throughout Europe. 



