The structure of the gemmules of this species differs considerably from that in any other known species of the genus, in which these structures are usually adherent and devoid of a true pneumatic coat. In some of the gemmules before me this coat measures in thickness about 1/9 of the total diameter of the gemmule. _C. caunteri_ is the first species of _Corvospongilla_ to be found in the Indo-Gangetic plain. PART II. Genus HYDRA (p. 147). 25. Hydra oligactis (p. 158). Mr. Kemp found this species common in Bhim Tal in May. His specimens, which were of a reddish-brown colour in life, appear to have been of more vigorous constitution than those taken by Major Stephenson in Lahore. Some of them had four buds but none were sexually mature. PART III. Genus FREDERICELLA (p. 208). 28. Fredericella indica (p. 210). This species is common in some of the Kumaon lakes, in which it grows, at any rate at the beginning of summer, much more luxuriantly than it does in the lakes of the Malabar Zone in autumn, forming dense bushy masses on the under surface of stones, on sticks, &c. The vertical branches often consist of many zooecia. Mr. Kemp took specimens in Malwa Tal, Sath Tal, and Naini Tal (alt. 3600-6300 feet). Genus PLUMATELLA (p. 212). 30. Plumatella emarginata (p. 220). Mr. Kemp took bushy masses of this species in Malwa Tal and Bhim Tal. 32. Plumatella diffusa (p. 223). This species is common in Malwa Tal and Bhim Tal in May. 33. Plumatella allmani (p. 224). Mr. Kemp only found this species in Malwa Tal, in which (at any rate in May) it appears to be less abundant than it is in Bhim Tal in autumn. Mr. Kemp's specimens belong to the form called _P. elegans_ by Allman. 34. Plumatella tanganyikæ (p. 225). Specimens taken by Mr. Kemp, somewhat sparingly, in Bhim Tal and Sath Tal in May exhibit a somewhat greater tendency towards uprightness of the zooecia than those I found in autumn in Igatpuri lake. The ectocyst is, in the former specimens, of a deep but bright reddish-brown. The zoaria are attached to twigs and small stones. Genus STOLELLA (p. 229). After Stolella indica, p. 229, add a new species:-- Stolella himalayana, nov. This species may be distinguished from _S. indica_ by (i) its entirely recumbent zooecia, and (ii) the lateral branches of its zoarium. [Illustration: Fig. 49.--_Stolella himalayana_ (types, from the Kumaon lakes). A. The greater part of a young zoarium. B. Part of a much older zoarium.]