D(1 rlr\aliolis nl' the | >r ri | >hr r\ , n| i r:ir|| ->idr of llir mantle. 

 Urlurrll Ihr-i Mild llir rdlM' .if the mail! Ic. Una! 



ride's mark III*' rildillieliK ol' llir rpipodia. while the mouth 



:ippr:n-> in tin- middle line in front of tin- manllr, and tin- aim-. 

 with the rudiments of the li'ills. behind it. Thr rr^l of the 



blastoderm I'unns tile \v:lll^ ol' ;i vilcllilic s.-n-U. rliclo>i!li: llir 

 hirirrr l)l:is| uinri 



I'lir i>:illi;il surlarr m\v ui'a<lii:ill v lir-onu-.s nmrr ;inl inon 

 rni)\r\. ihr poslrri'ir ni:iruiii of the iniiiitlr urowinu' into ;i I'rrr 

 I'olii. \vliirll rlldosrs llir |).'llli:>l rh:illll)rr :ill<l ro\crs ovrr tlir Llill->. 



-Tin- intri-n:il shrll is drvrloju-d in :i sue I'orinrd |.\ :in invnlu- 

 lion ol' tin- rrlodrnn of tlir nniiitlr '1'hr t i |i|)odi;i unite lirhind. 

 ;iml ii'ive rise lo the I'linnel. while the :intrro-l:itrr:tl portion^ of 

 thr loot LITOW o\rr the nioiith.;ind til US gradually force the hitter 

 to hike ii| a position in the eeiitre of the Jit'iirnl l':iee, insteinl ol' 

 in lYont of il. r !'he \<>lk s:iek ^I'lidn.-dlv diininislies. :ind ihe eoii- 

 lainrd lIastonirrt-s ;ire linallv t;ikrii into thr interior ol' the 

 nil sue. inlo which the :ilinieiit;iry e;in:d is gradually drawn." 

 Hi XI.KY. " Aiuiliiniv of Invcrtchrntcd A ninuds/ 1 



Such is the Itinuiiau'r of a master equally of the art of coiulcii- 

 >alion of lanii-iiav,-e and of anatomy, and who has enriched 

 inalaeolo^ieal anatomy impailially with that of other branches of 

 natural science ly his rese:irchcs. 



At a later period of development, respiratory movements :uv 

 performed l>y the alternate dilatation and contraction of thr 

 mantlr. and thr position of Ihr ink-l>au; is revealed liy its color 

 through the t r;in.-p:i rent llesh. The shell of the younv; Sepia, 

 o!i>ervr> K("l!ikrr, by the time it is prepared to leave the nidi- 

 mental eap^iile has already formed, but except the nucleus, which 

 is calcified, its fine Inyerg an- iiorny and transparent. The lins 

 are proportionally broader than those of the mature animal. 



The development of Nautilus, equally with its nidus is unknown. 



fit-ill /ti.tfriltnliini. ami /)rrr//inii'ii/. 



In all fossil Men MIS sti'ata the cephalopods hold a hi^h position 

 by reason of their lar-jr development iii Species and individual^. 

 Tho ,iinrulatrd ^lu'll>of >i|id textui'e 



