MOLLUSCA. 
445 
called pancreas, and the spiral caecum ; the seeretions of the last- 
named glands could not be examined separately. The organs 
called aquiferous poiiehes by Delle Chiaje, and peritoneal caeca 
by Milne-Edwards, produce an excretion which contains uric 
acid, and therefore are to be regarded as kidneys. The eggs 
are white within the genital organs, but appear black as soon 
as they are expelled; in one single instance they remained 
white, but proved to be sterile. Strychnia and curare have the 
same effect on this animal as on Vertebrates. The properties 
of the blood, which contains but little fibrine and globuline, are 
described; the phenomena of the animal slowly dying by 
asphyxia, when exposed to the air, are observed. All these 
observations were made in the laboratory attached to the Aqua- 
rium of the Scientific Society at Arcachon. 
LoUgo vulgaris (Lam.) moves alternately forwards and backwards by 
means of the terminal fm, but for more rapid movements it uses only the 
infundibulum. Sepia officinalis (li.) is much more sedentary ; it swims^ 
by ejecting water from the infundibulum, backwards and also forwards, in 
which latter case tlie infundibulum is bent back ; for accelerating the move- 
ment forwards it uses the arms of the fourth pair ; but it swims also some- 
times only by an undiilatory movement of the lateral fins ; the two longer or 
tentacular arms are used for grasping its prey. Octopus vulgaris (Lam.) 
swims only backwards by means of the infundibulum, and feeds chiefly on 
Cardium eduley which it seems to suck without injuring the shell. Crosse, 
Journ. Conch, xvi. pp. 8-15. 
Argonauta argo (Gmel. [better L.]), tuherculosa (Shaw), liians (Dillw.), 
and gondola (J)illw.), Kiister, Conch, sect. 56. pp. 3-6, pi. 1. figs. 1-4 (old, bad 
figures), pi. 2. fig. I (bad), and pi. 3 c. fig. I (good, new). Some contradic- 
tory statements concerning the animal are mentioned by J. Ford, Am. Journ* 
Conch, iv. pp. 276, 277. 
Octopus vidgaris (Lam.), Sepia officinalis (L.), and Loligo media (L.)* 
Lingual dentition figured by Hogg, Transact. Roy. Microscop. Soc. xvi. pi. 9. 
figs. 21, 22, & 27. 
Sepia officinalis (L.). Shelly plate figured, Kiist. Conch, sect. 65, Argo- 
nauta, pi. 4. figs. 1, 2. 
Sepioteuthis ovata, sp. n., Gabb, Am. Joum. Conch, iv. p. 193, pi. 17, Santa 
Cruz, West Indies. 
Onychotcuthis eequhnanus, sp. n., Gabb, 1. c. p. 23, pi. 2, South Pacific, in the 
the vicinity of the Society Islands. 
Spirula q^^^'onii (Lam.), Kiister, Conch, sect. 65, Argonauta, p. 12, pi. 4. 
figs. .3-5. 
Nautilus qjompilius (L.), scrohicidatus (Solander), macromphalus (Sow.), 
umhilicatus (Lister) [this is an Antelinnean author, not admissible in 
S3'^stematic nomenclature], and stenomphalus (Sow.) described and figured 
by Kiister, /. c. pp. 1-11, pi. 2. fig. 2 (old), pi. 3 (old), pi. 3 o, pi. 3 ft, & pi. 3 c. 
fig. 2. 
% H 
18G8. [voL. v.] 
