HI 
Som disse er nservserende Myside en udpraeget Dyb- 
''andsfomi, hvad der allerede paa Forhaand tydeligt nok 
fieuigaar af 0iiienes mdimentsere Beskaffenhed, og da den 
O'enomtalte Station tilhorer den kolde Area, er den end- 
' idere at betragte som en segte bpinordisk ellor arktisk E orm. 
Ordo Cumacea. 
Fam. Diastylidse. 
Gen. Diastylis, Say. 
Transactions of the Philadelphia Philosophical Society. 
12. Diastylis nodosa, G. 0. Sars, n. sp. 
(PI. VII, Pig. 1—4). 
diastylis nodom, (t, 0. Sars, Crustacea et Pycnogonida nova etc., 
No. 51. 
Artseharacteristic. Rygskjoldet stort og opsvulmet, 
biagtil hgit hvselvet, fortil nedadskraanende, uden Haai eller 
' i?ge, men forsynet med et Antal af storre afrundede, 
vlatte og glindsende Knuder, hvoraf S til liver Side danner 
en horizontal buet Rsekke, der begnendser et noget affladet 
dorsalt Felt. Rostrum af middelmaadig Lsengde, horizontalt 
nu 'd Sidekanterne tandede. De frie Forkropssegmenter 
nsesten ganske glatte; det sidste med en enkelt opret loin 
1 Midten og Sidebjornerne noget koniskt uddragne. De 2 
iniTeste Bagkropssegmenter oventil ved den bagre Rand 
bevsebnede med 2 parvis ordnede Torner, de 2 folgende kun 
1U( 'd en enkelt saadan, de 2 sidste med en median Bffikke 
af Torner. 0i e t ikke synligt. lste Par Fpleres Skaft over- 
1; tgende Rostrum. Svpberne meget korte. lste Fodpar med 
de ydre Led tynde og forlamgede ; sidste Led kortere end 
det foregaaende. Det midterste Halevedhmng stserkt foi- 
tanget. med 9 Par Sidetorner. De ydre Halevedbamg kun 
lidet lsengere end det midterste, med Endegrenene korte 
0R omtrent af ens Lamgde, den indre oleddet med 10 Torner 
1 den indre Kant og Spidsen dolklormigt udtrukken. I ar \ en 
Llegt kjodrod. Lsengden indtil IS” 1 ” 1 . 
Findested. Stat. 357. 
Bemeerkninger. Den ber ombandlede nye Art slutter 
i Here Henseender meget nser til den af Hellei fra den 
Dsterrigsk-UngarskebJordpolexpedition beskrevne D. spimdosa, 
'Wen skiller sig strax ved Mangelen af de talrige spidse 
Torner, livormed saavel Rygskjoldet som de frie Forkrops- 
segmenter bos denne sidste Art er bevmbnet. Det eneste 
Like these animals, the present Mysidian is a promi- 
nent deep-sea form, which appears at a glance from the 
rudimentary character of the eyes; and the above-mentioned 
Station having been in the cold area, it must, moreover, 
be regarded as a true Arctic species. 
Ordo Cumacea. 
Fam. Diastylidse. 
Gen. Oiast.ylis, Say. 
Transactions of the Philadelphia Philosophical Society. 
12. Diastylis nodosa, G. 0. Sars, n. sp. 
(PI. VII, figs. 1—4). 
Diastylis nodosa, Ct. 0. Sars, Crustacea et Pycnogonida nova etc., 
No 51. 
Specific Character. — Carapax large, posteriorly high 
and arched, anteriorly shelving downward, without either 
hairs oi* spikes, but having a numbei ol laige, lounded, 
smooth, and shining prominences, of which 8 on either side 
form a horizontal, arcuate series, bounding a somewhat 
applanated dorsal tract. Rostrum of moderate size, horizontal, 
with the lateral margins dentate. Free segments of the 
anterior division of the body almost quite smooth; the last 
having a single perpendicular spine in the middle, and with 
the lateral corners somewhat conically produced. The two 
anterior segments of the posterior division of the body armed 
above, on the posterior margin, with 2 spines, arranged in 
pairs; the 2 succeeding with but a single spine, the 2 last 
with a median row of spines. Eye not visible. Peduncle of 
1st pair of antenna; projecting over the rostrum, flagella 
exceedingly short. First pair of legs having the outer joints 
slender and produced ; the last joint shorter than the pre- 
ceding. Telson greatly produced, with 9 pairs of lateral 
spines. Outer caudal appendages but little longer than 
telson. with the terminal branches short, and well-nigh uni- 
form in length, the inner one three-jointed, with 10 spines 
along the inner margin, and having the point dagger-shaped 
and elongate. Colour a light-red, or pink. Length reach- 
ing 18“ ra . 
Locality. — Stat. 357. 
Remarks. — The species treated of here approximates 
in several respects very closely D. spinulosa, — from the Au- 
strio-Hungarian Expedition, — described by Heller, but is at 
once distinguished by its wanting the numerous acute 
spines with which, in the latter form, both the carapax 
and the free segments of the anterior division of the body 
