27 
ens og saalecles danner tilsammen en vel begramdset eien- 
dommelig Typo blandt Cariderne. 
Af de tidligere bekjendte Slmgter koinmer den utvivl- 
somt SI. Hipolyte nsermest, men skiller sig fra denne blandt 
andet meget vsesentligt ved det sserdeles korte og simple 
Pandehorn og de enormt udviklede Supraorbitaltorner, der 
sammen med Pandehornet danner en eiendommelig og meget 
tydeligt begrsendset. pladeformig, i Enden trekantet Pande- 
del; fremdeles ved Folernes indbyrdes Stilling samt Kind- 
bakkernes meget forskjellrge Bygning. endelig ogsaa ved 
den usadvanlige Udvikling af 2det Par Foleres Blad og 
ved Halevedhsengenes Form. 
Endnu en Character, som det forst under vor Expedi- 
tion lykkedes mig at faa sikkert constateret, fortjener smrligt 
at udhseves, og det er, at Ungeme ikke gjennemgaar den 
saedvanlige postembryonale Forvandling eller saakaldte Larve- 
tilstaud, men koinmer ud af de ussedvanlig store 2Eg for- 
synede med alle sine blivende Lemmer. Slaegten skiller sig 
i denne Henseende fra alle bekjendte Carider, alene med 
I ndtagelse af den ligeledes af mig opstillede Slsegt Cryp- 
tocheles, hos hvem jeg bar fundet Forholdet fuldkommen 
ligedant. 
Alle Slsegtens Arter er udprsegede Dybvandsformer 
og bserer ogsaa tydeligt Prmget heraf ved de ussedvanlig 
smaa og ufuldkomment udviklede 0ine. 
4. Bythocaris leucopis, G. 0. Sars, n. sp. 
(PI. in, Fig. 1—20). 
Bythocaris leucopis } (t. O. Sars, Crustacea ct Pycnogonicla nova etc., 
No, 1. 
Artscharacteristik. Rygskjoldet fortil med en tydelig 
Lamgdekjol bevsebnet med en enkelt liden fortilrettet Tand 
i Midten. Pandedelen noget fremspringende; den midterste 
Tand (Pandehornet) kjendeligt lsengere end Sidetamderne, 
spidst uddragen og overragende 0inene. Disse meget smaa 
og smale, med opakt lividt Pigment, lste Par Foleres 
indre Svobe nsesten 3 Gauge lsengere end den ydre. 2det 
Par Foleres Blad af enorm Stprrelse, stserkt udvidet mod 
Enden og her tvsert afskaaret med den forreste Rand fint 
cilieret; det tandformige Fremspring i det ydre Hjorne tset 
trykket til Bladet og neppe overragende den forreste Rand. 
Det midterste Halevedhseng med Spidsen i Midten tydeligt 
udrandet og til liver Side af Fdrandingen bevmbnet med 2 
sserdeles smaa Torner. Farven pragtfuld morgenrod. Lrnng- 
den indtil 95”™. 
Findesteder. Stat. 295, 297. 
Bemserkninger. Fra de ovrige Arter af Slsegten er 
den her omhandlede Form let kjendelig. foruden ved sin 
agree in their principal characters, and thus constitute 
together a well-defined, peculiar type among the Caridians. 
Of the genera hitherto known, it unquestionably 
approximates closest the genus Hippolyte, but is however 
most saliently distinguished from that form by reason of 
its exceedingly short and simple rostrum and prodigiously 
developed supraorbital spines, which, along with the rostrum, 
constitute a peculiar and well-marked frontal area, tridentate 
at the extremity; moreover, by the relative position of the 
antenna?, as also the very different structure of the mandi- 
bles; finally, too, by the unusual development of the scale 
of the 2nd pair of antennae and by the form of the caudal 
appendages. 
Another characteristic peculiarity specially worthy 
of notice, which I first succeeded in fully substantiating 
on the Norwegian Expedition, lies in the young of the 
animal not passing through the usual postembryonic meta- 
morphosis, or the so-called larval stage; they leave the 
remarkably large ova provided with the full number of appen- 
dages. So far, the genus is distinguished from every known 
Caridian, save only Cryptodieles , also established by myself, 
in which I have found precisely the same characteristic. 
All the species of the genus are true deep-sea forms, 
of which, too. they give manifest indication in their unusually 
small and imperfectly developed eyes. 
4. Bythocaris leucopis, G. 0. Sars, n. sp. 
(PI. III. figs 1 — 26). 
Bythocaris leucopis , Gr. 0 . Sars, Crustacea et Pycnogonida nova etc., 
No. l. 
Specific Character. — Carapax anteriorly with a 
distinct longitudinal carina, armed in the middle with a 
single small, anteriorly directed tooth. Frontal area some- 
what projecting; ’medial tooth (rostrum) perceptibly longer 
than lateral teeth, sharply produced, and extending beyond 
the eyes. The latter very small and narrow, with an 
opaque, white pigment. Inner flagellum of 1st pair of an- 
tennae almost three times as long as outer. Scale of 2nd 
pair of antennae of prodigious size, greatly expanded to- 
ward the extremity, and here cut straight off, with the 
anterior margin finely ciliated; dentiform projection at 
outer edge closely pressed against the scale, and scarcely, 
if at all, extending beyond the foremost border. Telson 
with the point in the middle considerably emarginated, and 
armed, on either side of the emarginatiou, with 2 extremely 
small spines. Colour a magnificent rosy red. Length 
reaching 95""". 
Locality. — Stats. 295, 297. 
Remarks. — Irrespective of its great size and magni- 
ficent colouring, the form here diagnosticated may be readily 
4 * 
