Marine isopods collected in the Philippines by the fisheries steamer Albatross in 1907-08 . gth and di-rected posteriorly. Only one specimen, a female, was collected in type is in the United States National Museum,Cat. No. 43133. In addition to the new species, two other spe-cies of Cleantis have been described from Japan, ( Miers1 and 0. strasseni Thepresent species is, however, closer to O. occidentalisKichardson from Magdalena Bay, Lower California. It differs fromG. occidentalis in lacking the groove on the posterior portion of theanterior part of the ter
Marine isopods collected in the Philippines by the fisheries steamer Albatross in 1907-08 . gth and di-rected posteriorly. Only one specimen, a female, was collected in type is in the United States National Museum,Cat. No. 43133. In addition to the new species, two other spe-cies of Cleantis have been described from Japan, ( Miers1 and 0. strasseni Thepresent species is, however, closer to O. occidentalisKichardson from Magdalena Bay, Lower California. It differs fromG. occidentalis in lacking the groove on the posterior portion of theanterior part of the terminal abdominal segment, which is elevatedabove the posterior fourth part of the segment, and in the presenceof a boss surmounted with a tubercle in the center of the depressedarea at the posterior extremity of the terminal segment. The narrow, elongate form of the body, with sides almost paralleland the disposition of the legs would seem to place this species amongthe tube-dwelling forms. Cleantis tubicola Thomson was foundin a tube formed of a hollow stem of some marine or littoral Fig. 1. Cleantisjap on ic a. x 3(Drawn by Miss VDandridge.) 1 Journ. Linn. Soc. London, Zool., vol. 16,1883, pp. 80-81, pi. 3, figs. 9-11. 2 Abhandlungen der Klasse der k. Bayer. Akademie der Wissenschaften, II. Suppl., vol. 3,1910, pp. 67-69. no. 1883. A NEW ISOPOD FROM JAPAN—RICHARDSON. 29 Cleantis planicauda Benedict, Cleantis linearis Dana, Cleantis granulosaHeller, and Cleantis occidentalis Kichardson also have the narrow bodyand short fourth pair of legs. The tube-dwelling habit is perhapscommon to all these species. Owing to the differences in the shape of the body, which is broaderand more flattened, and in the character of the legs, and to the factthat the abdomen is composed of but two segments, Cleantis isopusMiers should not be retained in this genus. I suggest a new genusfor its reception, with the name Cleantiella. LIST OF REFERENCES. Miers, E. J. Revision of the
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