Norwegian Solenogastres. 31 
but infundibula from deeply penetrating folds of the cloacal cavity 
and lined with a similar epithelium; they are circular in section 
and branching at their distal ends, but become simple anteriorly. 
One lateral and one ventral bunch of these glandular tubuli are 
present on each side. Though they are undoubtedly homologous 
with the spicula glands of Kruppomenia minima and Pruvotina, 
they did not contain any secretory products in the present form, 
and their lining epithelium was different (cf. NIERSTRASZ 1905). 
As in Pruvotina they are also here accompanied by muscular 
fascicles. 
Wirenia n. gen. 
Body lengthened, showing a distinct thorax externally, rounded 
in section but compressed from the sides posteriorly, covered with 
a single layer of epithelial cells bearing semi-decumbent flattened 
spicula in the shape of lanceolate scales with acuminate tips directed 
backward. Ventral furrow with a single fold disappearing in 
front of the cloacal cavity. The latter with the walls on each 
side divided into radiating gill folds. 
Pharynx muscular, protrusible, without radula and with an 
inferior zone of subepithelial salivary glands. No differentiated 
oesophagus. Intestine with only a small dorsal coecum and with 
slightly developed diverticula, separated by very weak septal muscles. 
Coelomoducts paired throughout, not united medially. Proxi- 
mal legs narrow, opening anteriorly in a tube-shaped shell gland 
with secretory, proximally cyanophilous, distally erythrophilous 
epithelium; at the transition into this tube the pericardial duct 
forms a number of small vesiculae seminales with thin walls. 
Distal portions of the coelomoducts distinctly separated from each _ 
other and debouching separately in the cloaca. On the inside of 
the coelomoducts a pair of string-shaped organs ending blindly 
and freely with their anterior ends. 
Wirenia argentea n. sp. 
Mkips 115). 
Branchial folds 5 on each side of the cloaca (fig. 46). Colour 
white with a silvery gleam caused by the spicula. Length of 
animal 4.3, height 0.5 mm. Locality: Sunde, Hardangerfjord, |. sp. 
(G. O. Sars; K). 
owt 
