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Show 686 THE SECRETARY ON ADDITIONS TO THE MENAGERIE. [Nov. 19, to abandon it for the inherently much more probable view that these structures are processes of the head region. 15. Nautilus shows many strong resemblances to the Amphi-neura, and it is probably amongst these latter that we have to look for the nearest allies of the Cephalopoda. EXPLANATION OF THE PLATES. PLATE XXXVIII. Fig. 1. Side view of an animal oi Nautilus pompilius, extracted from the shell. The funnel has been opened out and the mantle-flap partly cut away so as to give a better view of the various parts. h, hood ; t, tentacles ; e, eye ; /, funnel separated by a deep groove from the hood-tentacle mass; m, cut edge of mantle-flap ; g, gill; s, siphuncle. Fig. 2. Longitudinal section through the animal of Nautilus very slightly to the right of the middle line. b, buccal cavity; r, radula ; eg, supra-cesophageal nerve-cord; pl.g., posterior sub-cesophageal nerve-cord; p.g., anterior ditto; /funnel with its valve; ph, crop with at giz. its opening into the gizzard; int., intestine ; an, anus ; k, kidney-chamber with follicular appendages of advehent vein projecting into it; p.foll., pericardial gland-follicles projecting into pericardium ; v.c, vena cava. PLATE XXXIX. Fig. 1. View of penis and sac of Needham from posterior (ventral) aspect. The outer wall has been removed so as to show a and b- the right and left halves of the penis. c, sac of Needham ; d, corresponding structure of left side ; e, bristle passing through opening of vas deferens into sac of Needham. Fig. 2. Spermatophore-receiving apparatus of an adult female with spermatophore (s) in situ. In this specimen the lamina? of the organ were continuous across the middle line. Fig. 3. The same organ in its more usual (paired) form. November 19, 1895. Sir W. H. FLOWER, K.C.B., LL.D., F.R.S., President, in the Chair. The Secretary read the following reports on the additions made to the Society's Menagerie during the months of June, July, August, and September, 1895 : - The total number of registered additions to the Society's Menagerie during the month of June was 212, of which 32 were by birth, 61 by presentation, 20 by purchase. 3 by exchange, and 96 were received on deposit. The total number of departures during the same period, by death and removals, was 90. The registered additions to the Society's Menagerie during the month of July were 132 in number. Of these, 58 were acquired by presentation, 3 by purchase, 19 by exchange, 28 by birth, and 24 were received on deposit. The total number of departures during the same period, by death and removals, was 94. |