REPORT ON THE AMPHIPODA. 85 



Feet ten, all armed with a moveable nail; the anterior pair very small, and originating 

 from the head. Mouth wth two jointed palpi, armed at the point with a Uttlo hook. The 

 female is furnished with a pouch, situated between the fins, in which she carries about the 

 eggs and her young after their exclusion, until they are enabled to shift for themselves." 

 "Genus LX. Caprella." " Sj). 1. Linearis." " Head with one little tubercle. Hand of 

 the second pair of feet with three teeth on the inner edge. Cancer linearis of Linne ; 

 Asiacus atomos of Pennant ; Caprella linearis of Latreille ; Oniscus scolopendroides of 

 Pallas." This Mayer is unable to identify, but the tridentate hand points pretty clearly 

 to Miiller's Sqnilla quadrilohata, Zool. Dan., pi. Ivi. figs. 4-6. " Sp. 2. Phasma," Montagu, 

 Linn. Trans., vol. vii., which is now Protella phasma, Montagu. " Sj). 3. Penantis." 

 " Astaeus atomos of Pennant." This has since been identified with Caprella acutifrons, 

 Latreille. " Sp. i. Acanthi/era." " Caj^rella acanthifera, Leach's MSS." " Genus LXI. 

 Panope. Body depressed. Eyes situated on the vertex of the head. Antennae four- 

 joiuted; the upper pair, with the basQar joint, largest; the second and third equal, but 

 rather shorter than the first ; apical joint very small ; inferior pair also composed of four 

 joints, shorter than the first joint of the upper pair. Feet compressed and armed with 

 strong nails ; the anterior pair situated on the base of the head, the wrist jointed. Hands 

 of the second pair armed with teeth on their inner edge. Fins of a leathery-mem- 

 branaceous substance, cylindrical and elongated. Anus produced, having a few obscure 

 small tubercles on each side and under. The pouch of the female with four valves." 

 " Sp>. 1. Ceti." "Oniscus ceti of Linne; Pycnogonum ceti of Fabricius ; Panope ceti, 

 Leach's MSS." Latreille's authority is quoted for the (erroneous) statement that it attaches 

 itself to fishes of the genus Scomber, as well as to whales, but no notice is taken of Latreille's 

 name for the genus, Cyamus. 

 Under " Order IIL Myriapoda. Family XVIII. Asellides," upon " Genus LXVI. Ctmothoa," 

 the observation is made : — " It is highly probable that Oniscus testudo of Montagu (Transac- 

 tions of the Linnean Society of London, vol. ix. page 102, tab. 5, fig. 5) is referable to a genus 

 akin to this." Leach having never himself seen the species, merely quotes Montagu's 

 description. 



18U. Leach, W. E. 



Article Crustaceology. Appendix. The Edinburgh Encyclopaedia. Vol. vii. 

 pp. 429-437. (That the date of this Appendix is not later than 1814 may be 

 inferred from the fact that the genera Fherusa and Proto appear in it as new, 

 without any reference to the mention of them in the Tabular View read before the 

 Linnean Society in April, May and June of 1814.) 



Leach has here " divided the Tribe Millepeda from the Crustacea, and considered them as a 

 distinct class, under the title of Myriapoda, and has jalaced the Oniscides and Asellides 

 with the Gasteruri." The two orders Entomostraca and Malacostraca are now considered 

 as subclasses. The three Tribes of the Malacostraca are called orders. The Gasteruri now 

 include seven Tribes called Gnathides, Gammerides, Phronimarides, Caprellides, Apseudides, 

 Asellides, Oniscides. Of these we find that the second, third, and fourth, belong to the 

 Amphipoda. The Tribe Gammerides, answering to the previous Family Gammarini, is thus 

 divided : — " Family I. Ohchestidj5," " Genus I. Talitrus," in which Leach has discovered 

 that Talitrus littoralis is only the other sex of Talitrus locusta ; "Genus II. Orchestia." 



"Family II. Dexamerid.e. Antenna three-jointed, the last joint composed of several other 

 minute articulations; upper ones longest," with two sections, "*Two anterior pairs of fte^ 



