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Show 790 MR. D. J. SCOURFIELD ON THE [June 15, in the paper previously quoted, records the following species from Spitsbergen :- Kolpoda cucullus ( = ? Oxytrichapelllonella) ; Stylonlchlaprustulata; Trichodlna tentaculala ( = ? Gyrocorls oxyura); Vortlcella microstoma ; and Monas. K GASTROTRICHA. The few examples seen belonging to this group were all representatives of the genus Chcetonotus, but the species was not determined in any case. BOTIFERA. This important group was carefully studied by Mr. D. Bryce, who has given so much attention to the subject of the rnoss-dwelling Botifers. It will be seen from his report following this paper that twenty-six species were observed, half of them belonging to the genus Callidina. One species is described for the first time, although it is not peculiar to Spitsbergen, having been previously found in England. N E M A T O D A. The Spitsbergen mosses appear to offer very favourable conditions for the existence of Nematoids, as specimens of these animals were found, usually abundantly, in nearly all the mosses examined. No attempt was made, however, to determine the species. Of the four species seen by Dr. Goes, as previously mentioned, one was thought by him to be new, whilst the others came nearest to Anguillula mucronata, A. ecauda, and Amblgura serpentulus respectively. Ehrenberg's two species were Anguillula longicauda and A. brevicauda. CHJETOPODA. Several of the collections contained numbers of Chastopod worms, but no special attention was given to them. TARDIGRADA. W h e n first examined the Spitsbergen mosses contained a moderate number of Water-bears, but afterwards they almost entirely disappeared. Unfortunately proper attention was not given to these animals when they were most abundant, and the notes about two or three of the species are therefore very imperfect. The following is a list of the forms seen. MACROBIOTUS HUFELANDII, C. Schultze. This well-known species was by far the most abundant, occurring in nearly all the mosses examined. Examples in all stages of development were seen (-j-j0"- iV')' an(^ occasionally eggs. The latter were covered with little conical projections (sharp-pointed, not blunt as figured by L. Plate, " Beitrage zur Naturgeschichte der Tardigraden," Zool. Jahrbucher, Bd. iii. Morph. Abt. Taf. xxii. |