Journal of Entomology and Zoology . marginmidway between anterior and posterior margins and almostround in shape. First antennji3 possess four articles; first broad,ahnost as wide as long; following three articles not half as wide;second and third su))((|nal; last clavate and slightly longer thantbe two ])receding. Fitst antennir extend to end of second articleof ])e(hin(le of second aiitenmr. Second antenn;u have a peduncleof five articles: first short; second and third sul)e(iual, twice as JOURNAL OF ENTOMOLOGY AND ZOOLOGY 187 loug as first; fourth not quite twice as long as third; fifth sli
Journal of Entomology and Zoology . marginmidway between anterior and posterior margins and almostround in shape. First antennji3 possess four articles; first broad,ahnost as wide as long; following three articles not half as wide;second and third su))((|nal; last clavate and slightly longer thantbe two ])receding. Fitst antennir extend to end of second articleof ])e(hin(le of second aiitenmr. Second antenn;u have a peduncleof five articles: first short; second and third sul)e(iual, twice as JOURNAL OF ENTOMOLOGY AND ZOOLOGY 187 loug as first; fourth not quite twice as long as third; fifth slightlylonger than fourth; flagellum consists of seventeen or eighteenarticles. Maxillipeds have a palp of five articles. Sides of thorax almost parallel in male. All but first segmenthave epimera which extend to end of posterior margin. Epimeraof second and third and fourth segments about equally wide fromanterior to posterior margins. Fifth, sixth and seventh muchnarrower at anterior than at posterior marginstructure. Legs alike in. Figure 10. Pentklotea aculeata n. sp. A, mandible; B, maxilliped; C, opercularvalve; D, second maxilla; E, first maxilla. Abdomen 8 mm. long, 4 mm. wide at anterior end; composedof two short segments, a partially coalesced and a long terminalsegment; the latter narrow and slightly excavate on the lateralmargins, prolonged at median posterior extremity into a pro-nounced tooth, 1 mm. long. Post-lateral angles rounded. Oper-cular valves composed of a long anterior and a short posteriorl^art. Carina not apparent on anterior portion. The above description applies only to the male. Along withthese a number of other specimens, all females, were collectedwhich are slightly different in shape: have lateral margins less 188 JOURNAL, OF ENTOMOLOGY AND ZOOLOGY parallel, more arched. They were lighter in color and moredistinctly marked than the males. These differences are prob-ably only sexual. These specimens appear to lie close to Pentidotea ivhitei inmany d
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