TRANSACTIONS OF THE SECTIONS. 
77 
af Dredging Researches inprogress. BgProi'. E. Forbes, P.R.S. 
A tnniber of sf)eciDQens of remarkable British animals were laid on the table, pre- 
«Tcd in ver\' perfect condition by Mr. Goadby, who is at present accompanying Mr. 
V'.ADdrew on a dredging voyage in the seas of the Zetlands and Hebrides. Mn 
If Andrew hasforwarded to meeting specimens of a living Terebratula dredged off 
Sw, ideotical with the crag fossil T. cistellula of Mr. Searles Wood. A new Holo- 
ikrin, discovered by Mr. Gwyna Jeffreys, was also Imd on the table. 
On the Anatomg of Scyllasa. 
Bg ALBAtJV Hascock and D. Kmbleton, M.JJ. 
Tie internal structure of this animal was found pretty accurately to agree with 
isdrtsuls given by Cuvier, though some inij)ortant matters relative to the digestive 
•HaratiM srem to have been overlooked. The presence of a gland at the conimence- 
Miof the rssophagus, its imall stomach receiving large ducts from the biliapr 
■ants, its large and long intestine approximate it to the Diirididae; but the 
tomiidi with an internal dental apparatus would appear to be peculiar. Its branched 
rstem of tubes in the skin and branchial tufts show its relation to the Eolidid®; but 
•I* ndiuBion of some of these tubes on the periphery of the globular biliary organs, 
■Hi tie convolutions of which tliey communicate, on the one hand, and the passage 
‘folhmtin the other hand into the intestinal canal, are peculiarities of structure not 
in either of the famibes mentioned. 
On the Structure of Nautilus Pbnipilius. 
Bg Prof. Van dor HGvkn of Leyden. 
Tip author, after noticing Uie successful labours of Prof. Owen in thin department 
nuntoiuical science, observes, the chief modifications which result from the 
“■•'’"lical invMiigution of the Nautilus in the general anatomical characters of the 
'fwk/podn are, thiit not all molluscii of that group have eight arms round the 
■"'“til. nrij- two venous hearts brsido the raiddU: cwirticul heart, nor only two gills, 
mli.iac. Those characters arc common to Scpiii, Loliyo and Octojws, In the 
fD the contrary,there are no lateral venous hearts; there are four instead 
’vi'trcjifAi*. The place of the eight arms is occupied by flat digitations of a far 
^^Bumber, including venniform and annulntcd tuntacula, which can be exserted 
celebrated friend Owen has founded on those characters a di- 
« , 1 *^ ^ephatopoda into two orders, viz. the lUhranchiata and tefrahranchiata. 
j^p^second division belongs, under the uow living mollusca, no other genua 
known, except Nauh7«8. Another inhabitant of a coucamerated or poly- 
tteciw * ■ ' But Bufficicutly known to us ; but still wliat we 
is quite sufficient to show that the animal haa no analogy with tlie 
M* IT' “d belongs to the dihranehitita division. , ^ , 
. nend De Vriese, Professor of Botanv at the University of Leyden, lately gave 
SoMiUud pompil'm, wliicli was in a bad state of preservation, bu 
M interest to me, as I found occasion to observe a conformation o e 
ATbff which has been d«crib«l by Owen and ValencieuDes 
^ c external fentaevla, I found oolv this verv unimportant modificsitmn, 
»iwt "'“cteen at each side instead of twenty. Internal to this ® 
part, called hood by Owen. iilU entirely the opening of 
^ prolongation, rising up to another more .i,. 
alSff r *!dc this prolongation unites by a transverse, part wij the 
^ part shSvs many transverse 
iWf, -jv ‘“aay imigular excavations, which gives to it a 
•doiW " is divided on each side in eight digilations of different size. 
®S rach a tentacle similar to that of the external set, but of a more minute 
'^.“'■respond to the mperior iahial processeii of Owen. ‘ 
i’-S-S-; but in Owen's d^ription,and also 
described by Valenciennes, there arc many more tentacula. twelve 
