. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. Fi^. 13.—Caprella phasma. Leptomera, Latr. (Proto, Leach), has fourteen complete legs (including the pair attached to the head), forming a regular series. In some of them (as in Gammarm pedatus, Wiiller, forming the type of the restricted genus Leptomera) all the legs (except the two anterior) are furnished with a basal vesicle, whilst in the others (Cancer pedah:s, Montague, being the type of Leach's Proto) these appendages exist only at the base o
. The animal kingdom : arranged after its organization; forming a natural history of animals, and an introduction to comparative anatomy. Zoology. Fi^. 13.—Caprella phasma. Leptomera, Latr. (Proto, Leach), has fourteen complete legs (including the pair attached to the head), forming a regular series. In some of them (as in Gammarm pedatus, Wiiller, forming the type of the restricted genus Leptomera) all the legs (except the two anterior) are furnished with a basal vesicle, whilst in the others (Cancer pedah:s, Montague, being the type of Leach's Proto) these appendages exist only at the base of the second and four following legs. Naupredia, Latr., has ten legs in a continuous series, the second and two following pairs having a vesicular body at the base. The typical species found on the French coast appears to me to be undescribed. Caprdla, Lamarck, have also only ten legs, but the series is interrupted; the second and following segments being destitute of legs, but each is furnished with two vesicular bodies. Type, Squilla lobafa, Miiller. [Dr. Johnston has published a monograph of the British species of this section in the eighth volume of the Maffazhie of Natural History, and Dr. Templeton and M. Guerin have respectively described various additional species of this curi- ous group.] The other Loemodipoda, forming a second section (Ovalia, Latr.), have the body oval, with the seg- ments transverse ; the terminal filament of the antennae appears to be inarticulated. The legs are short, or of only moderate length; those of the second and third segments are imperfect, and terminated by a long cylindrical joint without terminal hooks; they have at the base an elongated vesicular body. These Loemodipoda form the subgenus— Ci/amus, Latr. (Larunda, Leach), of which I have seen thi'ee species, all of which live upon Cetacea, and of which the commonest (Oniscus Ceti, Linn.) is also found upon the Mackerel. The fishermen call it the whale-louse. Another species, closely
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Keywords: ., bookauthorwe, bookcentury1800, bookdecade1860, booksubjectzoology
