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Show 798 MR. D. BRYCE O N THE [June 15, 18. ADINETA BARBATA, Janson. This well-marked species was seen several times. 19. ADINETA GRACILIS, Janson. Two or three small and slender examples seemed to belong to this species, but the form is difficult to distinguish from young specimens of A. vaga var. minor, unless a very good definition of the rostrum can be obtained. Order PLOIMA. I. ILLORICATA. 20. PROALES DECIPIENS, Ehr. Two or three examples only. 21. FURCULARIA GRACILIS, Ehr. One specimen. 22. DlGLENA PERMOLLIS, Gosse. This species occurs rather frequently in mosses and even in such as grow in positions usually dry. It would thus seem to be able, like so many of the Bdelloida, to protect itself against the fatal lack of moisture. For although some writers have loosely ascribed this protective faculty to the Botifera in general, I believe it to be in the main confined to the Bdelloida, and even there not universal. In the mosses now examined this species was not infrequent. II. LORICATA. 23. STEPHANOPS STYLATUS, Milne (7). A few examples enabled me to verify the general accuracy of Milne's description, and particularly of the mastax as figured by him. 24. STEPHANOPS TENELLUS, n. sp. Sp. Ch. Lorica delicate, yielding, laterally overlapping the very slender body ; posteriorly broadly and roundly truncate ; head-plate prominent, subsquare, decurved. Face prone, with several uncinate and one pair (at least) of long straight styles. Mastax twice as long as broad. Foot slender, retractile ; toes two, nearly parallel, decurved, about g of foot. Maximum length about 0*080 m m. or barely -^^ inch. One of the very smallest Botifera known and of exceedingly delicate structure. In general form, if not in size, in structural details, in habit of life, and in its most characteristic movements, it is almost the counterpart of S. stylatus, and indeed when I first met with it in 1891 in company with Dlstyla agilis I took it to be simply the very young form of its congener, which when adult is fully twice as long. In the present instance I had isolated a specimen to make certain that it was not D. agilis, when it almost |