7 
Findested. Stat. 10. 2 Exemplarer, begge Hunner. 
Bemserkninger. Hvorvidt den her omhandlede F orm 
i Virkeligheden er specilisk forskjellig fra Stimpsons Scyra 
umbonata, er det vanskeligt for Tiden med fold Sikkerked 
at afgjpre, da der endnu ikke foreligger nogen udforlig Be- 
skrivelse eller Afbildning af denne sidste. Stimpson’s korte 
Diagnose passer i alt vsesentligt temmelig godt paa vor Art, 
saa at det neppe herefter lader sig gjpre at udhaeve for 
denne sidste uogen egentlig distinctiv Character ligeoverfor 
den amerikanske Form. 
Skjpndt jeg for min Part skulde va:ro meget tilboielig 
til at anse disse to Former for identiske, tror jeg dog ikke 
paa Basis heraf udenvidere at kunne reducere Norman’s 
Art, saalsenge der endnu ikke er foretaget nogen noiere 
Sammenligning mellem begge de her omhandlede Former. 
Den opfares derfor her under det af Norman foreslaaede 
Artsnavn. 
Beskrivelse. Hele Legemets Overfiade er ligesom be- 
klaedt med et taet tiltagtigt Belaeg, der ved inhere Underspgelse 
bestaar af 2 forskjellige Slags Hudvecllneng. Inderst bemaerkes 
talrige smaa taet sammentrsengte knudeformige Udvsexter, der 
ved en flygtig Betragtning let vilde kunne tages for (Iranu- 
lationer 'af selve Hudskelettet, men som mermere beseede 
snart viser sig at vaere af en belt anden N atur, da de baade 
er af temmelig bled Consistens og med den storste Lethed 
lader jeg skrabe af. Ved Bekandling med Kalilud viser 
de sig (se Fig. 7) som hudagtige B borer eller Kapsler, 
der med en bred Basis er faestede til Hudskelettet og i 
Midten stpttes af en tynd chitingagtig Stav, hvis Spids 
rager mere eller mindre tydeligt frem fra Toppen. 
Imellem disse eiendommelige Hudvedbaeng og betyde- 
ligt overragende dem staar korte, men stive og i Enden 
noget hageformigt krummede Haar (Fig. 6), der isser er 
feet sammeutramgte paa den forreste Del af Bygskjoldets 
dorsale Flade, der herved fear et eget flpielsagtigt Udseende. 
De savnes imidlertid heller ikke paa, andre Dele af Legemet, 
saasom Pandehornene, Lemmerne og Bagkroppon. skjondt 
de ialmindeligked her er noget mere spredte. 
Bygskjoldet viser (se Fig. 1) den for Oxyrhyncherne 
characterise ske afrundet trekantede Form, med Lsengden 
noget stprre end Breden og den bagre Kant i Midten tem- 
melig stoerkt udbuet. Dets Overfiade er noget ujevn, uden 
at dog de forskjellige llegiouer markerer sig synderligt 
skarpt fra hverandre. Tydeligst er Begramdsningen mellem 
Maveregionen og Gjelleregionerne, hvilken viser sig som to 
dybe, bagtil convergerende Furer omtrent ved Midten af 
Bygskjoldets Lsengde. Seet i Proiil (Fig. 3) viser Byg- 
tladen sig stserkt hvielvet og temmelig brat nedadskraanende 
saavel mod Panden som den bagre Band. 
men large and broad, almost circular, with an obtuse carina 
along the middle. Colour a uniform dirty greyish-brown. 
Width between the points of the outstretched legs reaching 
250 mm . 
Locality. — Station 10: 2 specimens, both females. 
Remarks. — Whether the form treated of here be 
indeed specifically distinct from Stimpson's Scyra umbonata, 
is difficult to decide at present with absolute certainty, 
since a detailed description or representation of the latter 
has not yet been given. Stimpson’s brief diagnosis agrees 
well in all essential particulars with our species; and hence 
it is hardly possible to assign a pronounced distinctive 
character as contrasting with the American form. 
Though myself greatly disposed to regard these two 
forms as identical, 1 cannot, on the basis of a mere supposi- 
tion, presume to reduce Norman's species, till a further and 
more minute comparison shall have been made between the 
two forms treated of here. Hence, it is described under 
the specific name suggested by Norman. 
Description. — The whole surface of the body invested, 
as it were, with a dense, felt-like covering, which, on closer 
inspection, is found to consist of two different kinds of cu- 
taneous appendages. Innermost, crowded together, are ob- 
served numerous small tuberculiform excrescenses, which, at 
the first glance, may be readily taken for granulations on 
the skeleton of the skin, but, after a closer examination, 
are seen to be of a totally different character, since they 
have not only a soft consistence, but admit of being scraped 
off with the greatest facility. On treating these protube- 
rances with a solution of potash, they are found (see fig. 
7) to be true cutaneous vesicles or capsules, that, with 
a broad basis, are attached to the skeleton of the skin and 
supported in the middle by a slender chitinous-like rod, of 
which the point projects more or less distinctly forward 
from the top. 
Between these peculiar cutaneous appendages, and pro- 
jecting considerably beyond them, are short and comparatively 
stiff hairs (fig, 6), somewhat unguiform at the extremity, and 
crowded together, in particular on the anterior part of the 
dorsal surface of the carapax, which thus acquires a velvety 
appearance. These hairs, though not wanting on other 
parts of the body, for example the rostrum, the legs, and 
the abdomen, occur here as a rule somewhat more scattered. 
The carapax (see fig. 1) exhibits the rounded trian- 
gular form characteristic of the Oxyrhyncha , with the 
length somewhat greater than the breadth, and the posterior 
margin slightly arcuate in the middle. Its surface is 
somewhat uneven, but without the various regions of the 
body being sharply defined one from the other. The de- 
marcation is most distinct between the gastric and the branch- 
ial regions, occurring here as two deep, posteriorly converg- 
ing furrows about the middle of the longitudinal diameter of 
the carapax. Viewed in profile (fig. 3), the dorsal surface 
has an exceedingly curved appearance, sloping abruptly down 
alike towards the rostrum and the posterior margin. 
