686 THE SECEETAUT OK 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 alUes of the Cephalopoda, 



EXPLANATION OP THE PLATES. 

 Plate XXXVIII, 



Pig. 1, Side view of an animal of 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. 

 Pig. 2t Longitudinal section through the animal oi Nautilus very slightly to the 



right of the middle line. 



b, buccal cavity ; r, radula ; eg, supra-CESophageal nerve-cord ; pl.g., 

 posterior sub-oesophageal nerve-cord; p.g., anterior ditto; /, funnel 

 with its valve ; ph, crop with at gis. its opening into the gizzard ; 

 int., intestine ; an, anus ; k, kidney-chamber with follicular append- 

 ages of advehent vein projecting into it; p.foll., pericardial gland- 

 follicles projecting into pericardium ; v.c, vena cava. 



Plats XXXIX. 



Pig. 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 spermato- 

 phore («) in situ. In this specimen the laminsB of the organ were 

 continuous across the middle line. 



Pig. 3. The same organ in its more usual (paired) form. 



November 19, 1895. 



Sir "W. H. Flowek, K.C,B„ LL.D., F,E,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 additioos to the Society's Mena- 

 gerie 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. 



