9 
EXPLANATION OF THE FIGURES. 
(Published in the Transactions Z. S. vol. iv. Pl. 5-8.) 
Fig. 1—8 belong to the female Nautilus; fig. 9—14 to the male specimen, which 
is described at the end of my memoir. 
Fig. 1. A female Nautilus in its shell, from the left side. 
Fig. 2. The same specimen seen from above, and taken out of the shell. 
Fig. 3. The same, from below. 
The following letters indicate the same parts in those three figures: a, the 
hood ; 3, the eye; cc, the digitations; d, the funnel ; fff" i, the mantle ; 
i’, its visceral part; f’, the dorsal fold of the mantle ; g, the aponeurotic 
insertion of the shell-muscle. 
In figs. 1 and 3, / indicates the place where the laminated gland is situated. 
In fig. 2, 4 hh are three aponeurotic inscriptions on the visceral sac ; j is 
the sipho. 
Fig. 4. Branchial cavity and funnel of the same. F, funnel ; g, mantle, reflected ; 
ee, shell-muscles ; 2 h, first pair ; A’ h’, second pair of branchiz ; a, anus; 
b, vulva; ¢, caruncle at the root of the first branchia ; d, two pair of 
similar papillz at the bottom of the branchial cavity. 1, 2, 3, three pair 
of slits (at the left side of the figure the first is to be seen ; the two others 
are represented on the right side of the figure). 
Fig. 5. Side view of the head, the mantle f being reflected: a, hood; 4, eye; ec, 
digitations ; dd, funnel. 
Fig. 6. The same, after removing the digitations ; ¢ ¢, transverse sections of their 
tentacles; & &, external labial processes ; /, internal ditto; m, membrane 
covering the mandibles. 
Fig. 7. The same, after removing the external labial processes, cut off at kk. 
Fig. 8. Caruncle at the peduncle of the eye; organ of smell, a. 
Fig. 9. Head of a male Nautilus seen from above ; the hood has been divided by a 
longitudinal section; gg are the internal labial processes; below them, 
at the right side, is placed and partly visible at i, the external labial pro- 
cessus. The place of it occupies at the left side a large conoid body, a; 
m m is the fringed lip inclosing the mandibles. 
Fig. 10. The conoid body of the foregoing figure, separately seen from the inner 
surface, together with the incumbent internal labial processus of the left 
side. 
Fig. 11. Lateral view of the internal labial processus of the right side, with the 
mandibles and the surrounding lip. 
Fig. 12. View of the inferior surface of the muscular mass of the mouth, with the 
two cushion-like incised bodies, representing here the folds between the 
internal labial processes. 
Fig. 13. Penis. B, a longitudinal section of it. 
Fig. 14. A portion of the circumvoluted spermatophore or tube contained in the 
bladder at the basis of the penis. 
Leyden, 8 Dec. 1849. 
2. DESCRIPTION OF A NEW GENUS OF BATRACHIANS FROM SWAN 
River. By Dr. H. Scutecer, Curator or THE Roya 
ZooLocicaL Museum, LeypEN. (ExTRACTED FROM A Let- 
TER TO J. E. Gray, Esa.) 
“The following notice I hope is sufficient to give an idea of a new 
Toad which was discovered at Swan River by Dr. Pries :— 
*« MyYoBATRACHUS, 0. g. 
“Tongue small ; no teeth except two small horizontal fangs in the 
intermaxillary bone ; eustachian tubes separated, opening behind the 
eyes. Legs short, enveloped at the base in a duplicature of the skin 
