Randen, ere bladformige med den smalere Del vendt indad 
imod Midtpartiet, og have paa deres Overflade 2—3 Korn, 
Fig. 7 a. Skjoldets Centrum derimod dannes af smaa 
næsten runde, og paa den ydre Flade -ophgiede Plader, 
hvoraf 'en sidder i Centrum, Fig. 7, 0. Der, hvor Skjoldets 
- Rand ender, har Kroppen 5—6 Ringe, der ere besatte med 
større og mindre Chitinplader, som dels ere flade, dels 
runde og ordnede saaledes, at de runde, der ere meget 
smaa, altid sidde imellem de større flade, Fig. 7, c. 
Omtrent 3”” foran Endeskjoldet er en Indsnøring 
rundt Kroppen, Fig. 5, å; hvorefter denne aftager lidt*i 
"Tykkelse imod Snabelens Grund, hvor der paa Rygsiden 
findes det forreste Chitinskjold, Fig. 5, b. Dette er lidt 
hvælvet, 4”” langt, 3”” bredt ved Basis, 1.2” i Spidsen, 
Fig. 8. 
Skjoldets Rand, der især bagtil er meget ophøiet over 
Hudfladen, er kraveformigt sammensat af temmelig regel- 
meessige, aflange, hvælvede, fortil tilrundede Plader, som ere 
smalere ved Grunden, Fig. 8, a, og forlænge sig et lidet 
Stykke indover Skjoldets Rand. Imellem disse Plader, det 
vil sige der, hvor den ehe Plade nærmer sig den anden, 
er en lille Fure, Fig. 8 b, hvorved Randpladerne blive saa- 
meget desto tydeligere. Den centrale Del af Snabelskjoldet 
bestaar af runde, ophøiede Plader; som ere ordnede i Ræk- 
ker, der gaa ira Peripherien imod Centrum, Fig. 8 c. Imel- 
lem disse Pladerækker findes ligeledes fine Furer. 
Kroppens Overflade er besat med større og mindre 
. Chitinplader, der ere grupperede omkring Aabningerne for. 
Hudkjertlerne, Fig. 11, 12, 13, dog saaledes, at imedens 
de paa Kroppens Midtparti ere uregelmessig leirede, sidde 
de i temmelig regelmæssige Ringe strax bagentor det for- 
reste, og foran det bagerste Skjold. Den runde Analaab- 
ning findes strax bagentgr det forreste Chitinskjold. 
Snabelen er 16”” lang, Fig. 5, og besat lige tra Grun- 
den til dens forreste Ende med en stor Mangtoldighed af 
Hager, der sidde paa omtrent 600 Ringe, Fig. 9. Hagerne 
ere stærkt krumbøiede, hule langs den krumme: Rand, Fig. 
101  Basaldelen er 0.028”” og Høiden er 0.020", Fig. 10. 
Tentaklerne, Fig. 5 c, ere tra 10—12, temmelig smaa 
og sidde i Krands omkring den runde Mundaabning. 
Hudens Cuticula er ,tynd, vandklar og strukturløs, 
Fig. 12, a, 13, a, og dækker Chitinpladerne, Fig. 12,0, 13,0, 
der ere leirede i den cellulære Matrix, Fig. 12, c, hvori. 
findes mange Kjertler, som ere lidt langstrakte med en 
bred Basis, Fig. 12, d, og en kort Udførselsgang, Fig. 12, e, 
som aabner sig paa Kroppens Overflade med en liden Pore, 
Fig. 11, a, 13, ¢, omgivet at uregelmæssig grupperede Chi- 
tinplader, Fig. 10150125 13. 
Indenfor Matrix er et tyndt Bindevævslag, Fig. 12, /, 
der støder til Muskelhuden, som er sammensat af Ring- 
og Længdemuskler. Ringmusklerne Fig. 12, g, bestaa af 
‘having on their surface 2 or 3 granules, fig. 7, a. 
slender part turned towards the middle of the plate, and 
The 
centre of the shield consists of exceedingly minute,, almost cir- 
eular laminee, raised on the outer surface, one of which ocoupies 
the centre, fig. 7, b. Where the rim ot the shield terminates, 
the body exhibits 5 or 6 rings, covered with chitinous 
plates, varying in magnitude, some flat, some raised, and 
so disposed, that the raised plates, which are very minute, 
invariably occupy a position between the comparatively 
large flat ones, fig. 7, c. 
About 8”” in advance of the terminal shield is seen 
a constriction of the body, fig. 5, a, from whence the latter 
diminishes in thickness to the base of the proboscis, where, 
on the dorsal surface, occurs the foremost chitinous shield, 
mer, ) (AD ' 
This shield, which is slightly areuate, measures 47” 
in length, 3”” in breadth, and 1.2”” across at the apex, 
fig. 8. The rim of the shield, posteriorly projecting to a 
considerable extent above the surface of the skin, is jugal 
in form, and built up of comparatively uniform, oval, arcuate 
plates, rounded off anteriorly; being narrower at the base, 
fig. 8, a, they are produced 'a little within the rim of 
the shield. 
fig. 8 b, by reason, of which the rim-plates are easier to dis-. 
tinguish. The central portion of the shield on the proboscis 
Between these plates, occurs a small groove, 
is composed of raised circular plates, proceeding in rows 
from the circumference to the centre, fig. 8, c Here, too,* 
minute furrows extend between the series of plates: 
The surface of the body is furnished with chitinous 
plates, of varying magnitude, grouped round the apertures 
of the glands of the skin, figs. 11, 12, 13, 
on .the medial region of the body, but immediately posterior 
to the foremost and anterior to the hindmost shield, in 
comparatively uniform annular series. The round anal 
opening is placed immediately posterior to the foremost chit- 
irregularly 
inous shield. 
The proboscis measures 16”” in length, fig. 5, and is 
studded from its base to its anterior extremity with a mul- 
titude’ of chitinous hooks, affixed to about 600 annulets, 
fig. 9. These chitinous hooks are much bent, and hol- 
lowed out along their curved margins, fig. 10. Width of 
basal portion 0.028”, height 0.020”, fig. 10. 
The tentacles, fig. 5, c, from 10 to 12, are comparatively 
small; they encircle, cincture-like, the round buccal aperture. 
The cuticle, thin, translucent, and structureless, figs. 
12, a; 13, a, invests the chitinous plates, figs. 12, b; 13, b, 
disposed throughout the cellular matrix, fig. 12, ¢, which is 
furnished with somewhat elongate in 
numerous glands, 
form, with the base broad, fig. 12, d, and a short excretory 
duct, fig. 12, e, opéning on the surface of the body through 
a small pore, fig. 11, a; 13, ¢, round which chitinous plates, 
figs. 11, 12, 13, are irregularly grouped. ' 
| Underneath the matrix extends a thin layer of’ con- 
nective tissue, fig. 12, f, contiguous to the muscular in- 
tegument, which is composed of annular and longitudinal 
* 
