Findested. Stat. 10. 2 Exemplarer, begge Hunner. 



Bemærkninger. Hvorvidt den her omhandlede Form 

 i Virkeligheden er specifisk forskjellig fra Stimpsons Scyra 

 wmbonata, er det vanskeligt for Tiden med fuld Sikkerhed 

 at afgjøre, da der endnu ikke foreligger nogen udførlig Be- 

 skrivelse eller Afbildning af denne sidste. Stiuipson's korte 

 Diagnose passer i alt væsentligt temmelig godt paa vor Art, 

 saa at det neppe herefter lader sig gjøre at udhæve for 

 denne sidste nogen egentlig distinctiv Character ligeoverfor 

 den amerikanske Form. 



Skjøndt jeg. for min Part skulde viere meget tilboielig 

 til at anse disse to Former for identiske, tror jeg dog ikke 

 paa Basis heraf udenvidere at kunne reducere Normans 

 Art, saalænge der endnu ikke er foretaget nogen nøiere 

 Sniiimenligning mellem begge de her omhandlede Former. 

 Den opføres derfor her under det af Norman foreslaaede 

 Artsnavn. 



Beskrivelse. Hele Legemets Overflade er ligesom be- 

 klædt med et tæt tiltagtigt Belæg, der ved nøiei - e Undersøgelse 

 bestaar af 2 forskjellige Slags Hudvedhæng. Lnderst bemærkes 

 talrige smaa tæt sammentrængte knudeformige Udvæxter, der 

 ved en riygtig Betragtning let vilde kunne tåges for Granu- 

 lationer [af selve Hudskelettet. men som nærmere beseede 

 snart viser sig at være af en helt anden Natur, da de baade 

 er af temmelig bind (.'oiisistens og med den største Lethed 

 lader jeg skrabe af. Ved Behandling med Kalilud viser 

 de sig (se Fig. 7) som hudagtige Blærer eller Kapsler, 

 der med en bred Basis er fæstede til Hudskelettet og i 

 Midten støttes af en tynd cbitingagtig Stav, hvis Spids 

 rager mere eller mindre, tydeligt frem fra. Toppen. 



Imellem disse eiendommelige Hudvedbæng og betyde- 

 ligt overragende dem staar korte, men stive og i Enden 

 noget hageformigt krummede Haar (Fig. 6), der især er 

 tæt sammentrængte paa den forreste Del af Rygskjoldets 

 dorsale Flade, der herved faar et eget lløielsagtigt Udseende. 

 De savnes imidlertid heller ikke paa andre Dele af Legemet, 

 saasom Pandehornene, Lemmerne og Bagkroppen, skjøndt 

 de ialmindelighed her er noget mere spredte. 



Rygskjoldet viser (se Fig. 1) den for Oxyrhyncherne 

 cbaracteristiske afrundet trekantede Form, med Længden 

 noget større end Breden og den bagre Kant i Midten tem- 

 melig stærkt udbuet. Dets Overflade er noget ujevn, uden 

 at dog de forskjellige Regioner markerer sig synderligt 

 skarpt fra. hverandre. Tydeligst er Begnendsningen mellem 

 Maveregionen og Gjelleregionerne. hvilken viser sig som to 

 dybe, bagtil convergerende Furer omtrent ved Midten af 

 Rygskjoldets Længde. Seet i Profil (Fig. 3) viser Ryg- 

 tiaden sig stærkt hvælvet og temmelig brat nedadskraanende 

 saavel mod Pandeu som den bagre Rand. 



men large and broad, almost circular, with an obtuse cariua 

 along the middle. Colour a uniform dirty greyish-brown. 

 Width between the points of the outstretched legs reaching 

 250™'". 



Locality. — Station 10: 2 specimens, both females. 



Remarks. — Whether the form treated of here be 

 indeed specificaUy distinct from Stimpsons Scyra wmbonata, 

 is difficult to decide at present with absolute certainty, 

 since a detailed description or representation of the latter 

 bas not yet been given. Stimpsons brief diagnosis agrees 

 well in all essential particulars with our species; andhence 

 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, I 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 specitic name suggested by Norman. 



Description. — The whole surface of the body invested. 

 as it were, with a dense. felt-like covering. which, on closer 

 iuspection, 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 hrst glance. may be readily tåken for granulations on 

 the skeleton of the skin. but. after a closer examination, 

 are seeu 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 hg. 

 7) to be true cutaneous vesicles or capsules, that, with 

 a broad basis, are attached to the skeleton of the skin aud 

 supported in the middle by a slender chitinous-like rod. of 

 which the point projects more or less distinctly forward 

 frorn the top. 



Between these peculiar cutaneous appendages. and pro- 

 jecting considerably beyond them. are short and comparatively 

 stiff hairs (fig. 6). soniewhat 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- 

 gula.r 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 v.-irious regions oi the 

 body being sharply defiued 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 (rig. 3). the dorsal surface 

 has an exceedingly curved appearance, sloping abruptly down 

 alike towards the rostrum and the posterior margin. 



