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MARINE ZOOLOGY Aporrhaid^ 135. Aporrhais pes-pclccaniy Linnaus.* Hastings. BUCCINID^ 136. Buccinum undatutn^ Linnsus. The whelk ; common. Hastings. The left-handed monstrosity, the keeled monstrosity and the acuminate form * also occur at Hastings, but are rare. 137. Donovania minima, Montague.* Hastings. 138. Neptunea antiqua, Linnaeus.* This species is recorded as ^ Fusus anti- quus,^ Linnaeus, and may be received with a little caution, since the animal is often imported into the town with the common whelk, as food, the shells being thrown upon the beach. Hastings. 139. Tritonofusus gracilis (Costa) Shell with the spire not quite in a straight line ; somewhat rare. Hastings. MURICID^ 140. Ocinehra erinacea, Linnaeus. Common. Hastings. 141. Ocinehra corallina, Scacchi.t Brighton. 142. Trophon clathratui, Linnaeus. t (?) British species. Brighton. 143. Purpura lapillus, Linnaeus. This species occurs in great variety of colouring, mainly white, yellow, orange or brown. Very common. Hastings. NASSIDi* 144. Nana reticulata, Linneeus. Both this species and the following one are frequenters of the lobster ' pots.' Very common. Hastings. 145. Nana incranata (Strom) Very common. Hastings. 146. Naisa pygmaa,ja,V[i2.rz'k..* Rare. Hastings. Pleurotomid^ 147. Bela turricula, Montague. Common in the trawl, dead shells only having been taken. Hastings. Bela turricula var. rosea, M. Sars. Rare. Hastings. 148. Bela rufa, Montague.* Somewhat rare. Hastings. 149. Mangilia costata (Donovan) Very rare. Hastings. 150. Majtgilia rugulosa (Philippi) Rare. Hastings. 151. Mangilia nebula (Montague) 1' Brighton. 152. Clathurella linearis, Montague.* Very rare. Hastings. 153. Clathurella reticulata, Renier.* Very rare. Hastings. OPISTHOBRANCHIA TECllBRANCHU ACT^EONID^ 154. Action tornatilis, Linnasus. Rare. Hastings. SCAPHANDRID^ 155. Schaphander lignarius, Linnaeus. Rare. Hastings. 156. Bullinella cylindracea (Pennant) t Brighton. Philinid^ 157. Philine aperta, Linnaeus. Rather local ; plentiful in Rye Bay. Hastings. Cavoliniid^ 158. Cavolinia trispinosa. Rang. Very rare. Hastings. NUDIBRANCHIA Herm^id^ 159. Hermaa dendritica. Species a little over inch in length, the general colour varying from seaweed green to orange. There is only one pair of tentacles, and they are char- acteristic of the genus, being folded lengthwise. The papillae are rather long and overhang the sides and middle of the back, giving to the animal a shaggy appear- ance. Further characteristic of the species is the dentritic veining, of a deeper colour, which runs down each side of the back supplying offshoots to the tentacles and papilla, the veins being more or less reticu- lated. The animal has a habit of con- tracting the head and tail, and in that condition much resembles a young specimen of the anemone Actinia mesemhryanthemum, the papillae representing the tentacles of the anemone. This species is decidedly rare. It occurred at Hastings during a rather hot summer, upon rocks at low spring tides, but has not been observed since. It is very difficult to detect. Hastings.