. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. the Species of Liinnoria. 387 Notwithstanding tliese many points of resemblance, there are, however, some minute characters by which most of the species can be distinguished. The most important of these seem to me to be the characters of the mandibles and the maxilHpeds. The exact relationships of the species seem rather difficult to disentangle, but the species may readily be distinguished in the following way : — Ai-tijlcial Key to the Species, , ) Palp of mandible two-joint
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. the Species of Liinnoria. 387 Notwithstanding tliese many points of resemblance, there are, however, some minute characters by which most of the species can be distinguished. The most important of these seem to me to be the characters of the mandibles and the maxilHpeds. The exact relationships of the species seem rather difficult to disentangle, but the species may readily be distinguished in the following way : — Ai-tijlcial Key to the Species, , ) Palp of mandible two-jointed L- segnis. I Palp of mandible three-jointed. 2. {Epipod of maxilliped shorter than second joint L. lignorum, E})ipod of maxilliped longer than second joint. 3. L. japomca. L. andreiosi. o \ Body with prominent tubercles on pleon .... ' I Body without prominent tubercles on pleon. 4. {Peduncle of uropoda shorter than inner ramus. Peduncle of uropoda longer than inner ramus. 6. r. i Both rami of uropods very short L. antarctica. ) Inner rami of uropods not very short L. pfefferi. The order in which the species are given in this artifi- cial key does not co'-respond with their true relationships ; the following tree represents my idea of their probable origin —the position of L. japonica is, however, uncertain, as no definite information as to its mouth-parts is available :— L. segnis. L. antarctica. L. pfefferi. L. andrewsi. L. lignorum. L. It is always important to connect the characters by which species of a genus are related to one another with their. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original London, Taylor and Francis, Ltd
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