Norwegian Solenogastres. 7 
++ Back rounded; channel-shaped spicula with apices 
only a little broader than, and not markedly set 
Oilsinom, the shaits. 2 20 mm, 5... ... 
N. dalyelli Koren & Danievssen 1877 
b. Spicula closed, hollow, needle-shaped. 
+ Body lengthened, rounded or tapering (not trunc- 
ated) at the ends; hypodermis with distinct pa- 
pillæ. 
A. Gills a circlet of single radiating folds. 
< Body rounded posteriorly; radula greatly 
developed, with prolonged lateral processes; 
hypodermis papillae thick, cylindric; ventral 
foid i; gills 20; spicula decumbent, cross- 
ways arranged. Simrothiella Piissry 1898 
bd me Fad theyaedl hers Bie ae Y= 
S. mergaritacea Koren & Danietssen 1877 
xx Body tapering posteriorly; radula absent; 
hypodermis papillae thin-stalked; spicula 
radiating..... Drepanomenia Heatu 1911 
Ventral folds 5; L. 30 mm.... 
D. incrustata Koren & Danietssen 1877 
B. Gills a continuous circular transversally wrink- 
led plica; radula monoserial; hypodermis .pa- 
pillae with dilated, composed, heads; spicula 
tangential and radiating.......... 
Alexandromenia Heatn- 1911 
Ventral folds 11; radular plates with one den- 
ticulate process on each side. L. 10 mm. 
A. crassa n. sp. 
. << Body short, truncated; length about 3 times 
breadth; gills numerous, cirriform; radula small, 
distichous, formed by series of narrow serrated 
plates; 1 ventral fold; spicula tangential and 
radiating; hypodermis without papillae......... 
Kruppomenia Nierstrasz 1905 
Spicula needle-shaped. L. 4.5 mm 
K. borealis n. sp. 
88 Coelomoducts separated throughout. Spicula squamate, 
half-raised, tapering (spear-head-shaped); body lengthened 
with a thoracal constriction; gills 5 radiating folds on 
