97 larus, neither is the tip so much deflexed as in that species. The raptorial legs are rather slender, and are considerably compressed, the base of the termuial joint is very sUghtly thickened, the terminai part elongated and knife-;-»haped, the inner edge with two teeth ; tarsi of the three lašt pair of legs styliform ; abdomen with the lateral mar-gins of the first five segments thin and membranaceous, the fifth with a notch at the hind angle ; the sixth segment with six slight crests terminating in short spines, the two middle approximating; the seventh segment with a sharp crest which rises nearly as high above its dor-sal surface, as the space between its base and the edge of the segment ; the end of this crest is pointed ; the marginai teeth of the seventh segment are long and sharp, and have a slight ridge behmd; the penultimate joint of the outer branch of the appendages to the sixth ring long, and furnished on the outer edge with a series of nine spines, which are depressed, and cover each other at the base. In the G. scyllarus there are twelve of these spines. This species is about four inches long ; in its dry statė the greater part of the upper surface is tinged with a reddish hue, and along the middle of the back there is a pale line. The species of the genus Gonodactylus are, — 1. G. chiragra; 2. 6?. scyllarus; 3. G. Edmardsii, Berthold, Act. Gottingen. 1845, t. 3. f. 6 ; 4. G. cultrifer ; 5. G. styliferus ; 6. G. graphurus ; 7. G. trispinosus. The G. Edmardsii is the species met with in nearly every box of insects and fish imported from China. On the šame plate with the G. cultrifer is figured an Amphipod, which may be the species figured by Colonel Montagu in the ninth volume of the 'Linnean Transactions,' t. 5. f. 5, under the name of Oniscus Testudo. I have named this on the plate Acanthonotus Tes-tudo : it belongs to Prof. Ovven's genus Acanthonotus : in the British Museum it bears Dr. Leach's manuscript name, Vertumnus Cranchii. The head is produced and pointed between the antennse, and instead of the small number of segments assigned by Colonel Montagu to his Oniscus, there is the normai number of the various genera of Amphi-poda. 3. Description of a new Pupina and two new Helicinas, FROM THE COLLECTION OF H. CuMING, EsQ. By Dr. L. Pfeiffer. 1. Pupina bilinguis, Pfr. P. testd oblongo-ovatd, temti, pellu-cidd, nitidd, corned ; spird sensim attenuatd, obtusiusculd ; suturd impressd, vix callosd ; anfractibus 6, supremis 3 convexis, confertim striatis, seųuentibus subplanis, Icevigatis, ultimo ^ lon-gitudinis patilo superante ; aperturd verticali, subcirculari, bi-canaliculatd, canali utroųue aperto, ascendente, supero lamind validd, linguiformi, triangulari formato ; peristomate subincras-sato, breviter expanso, margine columellari plano, linguifornii, acuto. Long. 10, diam. 5 millim. Hab. in AustraUa orientali. No. CCVII. — Proceedings of the Zoological Society.