Det er paa Tegningen angivet, at det afbildede Exem- 
plar har været brudt. Dyret kom levende op, men under 
Contraktionen paa Spiritus er den fragile Skal brudt, dog 
ikke værre, end at den med største Nøiagtighed senere er 
sammensat, saa jeg tror min Tegning er fuldt korrekt, 
hvad Form angaar. 
Asbjørnsenia, n. Gen. 
Skallen oval, inæqvilateral, Laasen svag, har i høire 
Skal en enkel centralstillet Cardinaltand og i venstre en 
dobbel, ved hvis Basis sidder en mindre, svag Bitand. 
Asbjørnsenia striata, n. sp. 
Pl. XII, Fig. 14 a, 3. 
Skallen hvid, halv gjennemsigtig aflang oval, noget 
sammentrykt, inæqvilateral, fortil kort, truncat, bagtil ud- 
dragen afrundet; Umbonerne er langt foranstillede, men 
ikke stærkt fremtrædende; Dorsalranden bøier foran i en 
skjæv Retning ned mod den truncate anterior Rand, bagtil 
synker den langsomt og ubetydelig bøiet mod den skarpt 
afrundede posterior Rand, Ventralranden svagt bøiet; Laasen 
svag, 1 høire Skal er en centralstillet, noget bagudbøiet 
Cardinaltand og en stumpvinklet Lateraltand, i venstre en 
dobbel Cardinaltand og ved sammes Basis en mindre Bitand. 
Muskelindtrykkene lader sig ikke med Sikkerhed udrede. 
Sculpturen betaar af talrige og tætte concentriske Striæ, 
kun Umbonerne er næsten glat. 
Størrelse: 3"” anteroposterior og 1.6% umboventral 
Diameter. ! 
Forekomst: (St. 173 b—300 Fayne. 
Der forekom kun et dødt, men vel vedligeholdt Exem- 
plar. Hvorvidt man her har et udviklet Individ eller en 
Unge for sig er vanskeligt at afejore. Laasbygningen er 
mig i ethvert Fald fuldstændig fremmed, saa jeg har fundet 
det nødvendigt at danne en ny Slægt for den. Vor mage- 
1 Jeg anvender Marqs. de Gregorios Terminæ for Maalangi- 
velsen (,,Nomenclature des Coquilles* 1883), da jeg holder disse for 
de korrekteste og vil ikke give Anledning til Misforstaaelser. De er 
ogsaa anvendt under Gasterodoperne. 
It is stated in the illustration that the specimen 
illustrated has been injured. The animal was brought up 
alive, but the fragile shell was broken by its shrivelling in 
alcohol, but not more so than permitted it to be put toge- 
ther with perfect accuracy subsequently, so that, I believe, 
my illustration is quite reliable as regards the form. 
Asbjørnsenia, n. gen. 
Shell oval, inequilateral, the hinge faint; has, in the 
right-valve, a central cardinal tooth, and in the left-valve, 
a double one, at whose base a small indistinct secondary 
tooth is placed. 
Asbjørnsenia striata, n. sp. 
Pl. XII, fig. 14 a, 5. 
Shell white, semi-transparent, elongate oval, somewhat 
compressed, inequilateral, short anteriorly, truncate, poster- 
iorly attenuated, rounded. The umboes are placed well 
forward, but not strongly prominent. The dorsal margin cur- 
ves forward in a slanting direction down towards the truneate . 
anterior margin, and, posteriorly, it sinks slowly and only 
slightly curved towards the sharply rounded posterior 
margin. Ventral margin faintly rounded; the hinge delicate, 
in the right-valve there is a centrally placed, somewhat 
posteriorly bent, cardinal tooth, and an obtuse angulated 
lateral tooth; in the left-valve, there’ is a double cardinal 
tooth and, at its base, a small secondary one. The muscular 
impressions cannot with certainty be elucidated. The 
sculpture consists of numerous, and compact, concentric 
striæ, the umboes, alone, being almost smooth. 
Size. Anterio-posterior diameter, 8””, and umbo-ven- 
tral diameter, 1.67.1 
Habitat: Station, No. 173 b. Depth, 300 fathoms. 
One dead, but well preserved, specimen, only, was 
Whether we have before us, here, an adult, or 
The hinge 
obtained. 
a juvenile specimen is difficult to determine. 
is, at any rate, quite strange to me, so that I have found 
it necessary to establish a new genus for it. I have 
1 I make use of Marqs. de Gregorios terms for the measure- 
ments (, Nomenclature des Coquilles* 1883) as I consider them to be 
the most accurate, and as unlikely to occasion misunderstanding. 
They are, also, used with reference to the Gastopods. 
