pls 13-15, 19, 22-24.[Contains: p. 254: Laomedea acuminata; p. 277: Trichydra pudica; p. 263: On Tubularia indivisa; p. 338: Coryne gravata; p. 240: Stauridia producta; p. 447: On Atractylis; p. 448, note: On the reproduction of E. rameum; p. 449, note: Note on the development of Bougainvillea britannica from Atractylis ramosa; p. 450: On the fixed medusoid of Laomedea dichotoma; p. 453: Sertularia fallax; p. 453: On the reproductive organs of Laomedea geniculata; p. 454: Laomedea lacerata. - Also in: Edinb. New philos. J., n. ser. 7: 108-117; 282-286, pls 1-3 et 7; 9: 106-117, pls 1-3].Descriptors: Sarsia producta, Stauridia producta, Coryne producta(only pp. 106-114).