124 
hält Verf. für den Typus eines eigenen Gen. n. Pycnopodia, für das 
er folgende Diagnose aufstellt: Body depressed, multiradiate; rays 
equal; disk very broad, but with the inter-radial septa of its cavity 
extending inward quite to the mouth, and nearly reaching the walls 
of the stomach; septa thin, with only minute scattered calcareous 
deposits, but strengthened near their sharp inner edges by a flexible 
perdendicular band of artieulating feathered plates. Dorsal skin 
very sparsely provided with calcareous matter, containing only a 
few small scattered: tergal ossicles, bearing slender spines. On the 
back of the rays these ossieles are rounded and entirely isolated, 
but on the disk they are sometimes connected by a thin deposition 
of calcareous matter. Ambulacral furrows very broad, with the 
pores in four rows, except at the base where they form only two 
rows. Interambulacral ossicles strongly developed and very regular 
in their arrangement; these of the outer row trilobate, closely' ap- 
proximated, and imbricated. One madreporic plate. Papulae in 
elusters. (Unter dem Namen papulae versteht Verf. die sogenannten 
Tracheen.) en 
Aus Sars’ ÖOversigt u.s.w. heben wir folgende Diagnosen 
hervor: Astropecten arcticus Sars (p. 34). Sinubus inter brachia 
rotundatis; radio disei ad eundem brachiorum ut 1: 2'/,—2'/,; seu- 
tis marginalibus utrimque 24, scuto terminali impari hippocrepi- 
formi excepto, omnibus tuberculis conieis brevissimis undique tectis; 
superioribus (in medio brachio) spatio paxillifero sexies ad octies 
angustioribus, inferioribus latitudinem superiorum ter ad quater su- 
perantibus, scutis adambulacralibus spinis cylindrico-conieis 10—14 
obsitis, quarum exteriores tuberculis seu spinis brevibus scutorum 
ventralium parum maiores, interiores verum sensim longiores et 
tres intimae seu sulco’ambulacrali vicinae illis in scutis ventralibus 
quater vel quinquies longiores sunt. Color pallide miniatus aut 
aurantiacus. 
Pteraster militaris O. Fr. Müll. (p. 57). Disco modice convexo; 
brachiis longioribus; radio diseci ad eundem brachiorum ut 1:2, 
paxillis dorsalibus brevioribus, conicis, apice aciculis 2—-3, raro 4 
(solummodo in paxillis perianalibus pluribus), divergentibus mobili- 
bus coronato. Paxilli vagina cutanea obducti sunt, quae etiam 
aciculas obvelat easque cuti dorsali exteriori affıgit. Tessella ma- 
dreporiformis nodulosa seu tubereulis minutis conieis irregulariter 
obsita. Angulus quisque ovalis pinnis transversalibus duabus inti- 
mis discretis formatur. 
Pteraster pulvillus Sars (p.72). Disco tumido seu pulvinato, 
brachiis brevioribus ; radio disci (in. bipollinari) ad eundem brachio- 
rum ut 1: 1'/, paxillis dorsalibus maioribus, cylindrieis, apice aci-. 
culis 8—15 divergentibus mobilibus coronato. Paxilli vagina cuta- 
