Journal of Entomology and Zoology . d third segmentshave both antero- and post-lateral lobes with bilobate epimerabetween. Fourth segment has antero-lateral lobe prominent androunded, ])ost-hiteral less prominent; single-lobed epimera be-tween. Fifth similar to fourth with antero-lateral lobe nnichjnore rounded and conspicuous. Sixth and seventh have antero-lateral lobe very ])r()minent and produced sharply at posteriorextremity; ])ost-lateral lobe obsolete, its i^lace occu])ied by(•pimera. First paii oi legs prehensile, remaining ambulatory JOURNAL, OF ENTOMOLOGY AND ZOOLOGY 185 with bi-ungui
Journal of Entomology and Zoology . d third segmentshave both antero- and post-lateral lobes with bilobate epimerabetween. Fourth segment has antero-lateral lobe prominent androunded, ])ost-hiteral less prominent; single-lobed epimera be-tween. Fifth similar to fourth with antero-lateral lobe nnichjnore rounded and conspicuous. Sixth and seventh have antero-lateral lobe very ])r()minent and produced sharply at posteriorextremity; ])ost-lateral lobe obsolete, its i^lace occu])ied by(•pimera. First paii oi legs prehensile, remaining ambulatory JOURNAL, OF ENTOMOLOGY AND ZOOLOGY 185 with bi-unguiculate dactyli. First leg has toothed propodus forhalf the proximal distance. Abdomen composed of one large segment, possibly a verysmall anterior one though the suture was not distinct enough tomake this certain. Telson is produced at post-lateral angles intoa short, sharp point. Median part forms a rounded composed of a peduncle about three times as long asinner ramus. Outer ramus slightly shorter than inner Figure 8. Pentidotea aculeata n. sp. Pentidotea aculeata n. sp.(Figs. 8, 9 and 10) . Locality—Low tide pools, Laguna Beach, California. Color—Reddish brown in the male; female a more delicatepink with white spots along median line of back and two similar 186 JOURNAL OF ENTOMOLOGY AND ZOOLOGY rows of markings, each in a line half way between the medianline and the lateral margin. Both male and female have all thesegments and sntnres outlined with a bright red line. Body of male narrow and elongate and arched along medianline. Length 23 mm., greatest width 6 mm., almost four timeslonger than wide. Head about twice as wide as long, excavated on frontal marginwith antero-lateral angles distinct but rounded. Posterior
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