XXI. NOTES ON CRUSTACEA DECAPODA IN THE INDIAN MUSEUM. VII. Further Notes on Hippoeytidae. By vStanley Kemp, B.A., Superintendent, Zoological Survey of India. (Plate XXXVI). Although only two years have elapsed since my previous paper on the Indian Hippolytidae was published, a number of interest ing forms have come to light, obtained partly during the recent cruises of the 'Investigator' by Capt. R. B. Seymour Sewell, I.M.S., partly by Dr. Annandale in Japan, and partly by myself during a short visit to Port Blair in the Andamans. The Hippolytid fauna of Port Blair is one of great richness. During three weeks' collecting, fully half the known Indian species of the family were met with, enabling me to obtain notes on the natural colouration of several forms hitherto unknown in this respect. In addition, three forms were found that had not pre-viously been recognised, one representing a new generic type. Of these, Thor discosomatis is of particular interest owing to the fact that it lives commensally with a large anemone of the genus Discosoma, and is most peculiar in its colouration ; the species of Phycocaris, gen. nov. , is extremely grotesque in appearance and closely mimics the weed among which it lives. Borradaile, in a recent paper,* has briefly described a genus and three new species of Hippolytidae from the Maldives, the Seychelles and other localities. If my identification is correct, two of these, Thor maldivensis and Lysmatella prima (the latter the type of the new genus), occur in the Andamans; but I am inclined to think that Lysmatella should at most be distinguished only subgenerically from the closely allied Hippolysmata. Ex-hippolysmata, recently proposed by Stebbing'^ to include Hippolys-mata ensirostris and a nearly related form from S. Africa, does not appear to differ sufficiently to warrant either generic or subgeneric separation. Genus Saron, Thallwitz. Saron marmoratus (Olivier). 1914. Saron viarmoratits, Kemp, Rec. hid. Mils., X, p. 84. A number of specimens of this well-known species were ob-tained at Port Blair; the majority were found under stones left ' Borradaile, Ann. Mag. Nat. Hist., (8), XV, pp. 206, 208 (1915). 2 Stebbing, Ann. S. African Mus., XV, p. 94 (1915).