pinqua (typeexemplarer). Fra prof. Leche har vi endvidere 
hayt exemplarer af hans eylichna (utriculopsis) densistriata, 
som synes at være en dvergform af c. striata. Muligens 
tør den dog gjøre fordring paa at være en distinkt art. 
Jeffreys!) skjelner mellem c. znsculpta, Totten, og 
ce. striata, Brown, men vi antager, at han feiler naar han 
anser c. occulta, Mighels og c. scalpta, Reeve for synonym 
med striata. Leche og efter ham Posselt i sin oversigt 
over Grønlands brachiopoder og mollusker opstiller som 
selvstændige arter: c. insculpta, Totten, c. reinhardti, Møller 
og c. scalpta, Reve. Hvad den sidste angaar, da er den 
efter Leches tegning (tab. 1, fig. 22) let at identificere med 
c. striata, Brown, men vi kan ikke rede ud, hvad der 
skulde adskille de to første. Vi tror imidlertid at Leche 
har misforstaaet Reeves scalpta, thi at dømme efter Reeves 
tegning?) er denne ikke identisk med striata, Brown, men 
med 7nsculpta, Totten. 
Aurivillius omtaler fra Vegaexpeditionen ogsaa c. rein- 
hardte, c. insculpta, c. scalpta. Af disse er den første 
identisk med vor striata. Hans og vor insculpta synes at 
falde sammen. Den tredie art, scalpta, er det derimod 
ikke muligt at identificere, da den blot nævnes. Gould og 
Binneys bulla occulta?) er sikkerlig identisk med insculpta. 
Det samme gjælder disse forfatteres bulla solitaria. Hid 
hører ligeledes Krauses cylichna striata fra Beringshavet*) og 
hans occulta fra Spitsbergen®), Collin synes at slaa begge 
arter sammen under navnet cylichna reinhardti®); hans 
exemplarer fra Karahavet skal imidlertid ifølge Posselt 
svare ganske til Leches beskrivelse af c. scalpta, de maa 
saaledes være identisk med c. striata, Brown. 
Af disse to arter er c. striatd den eneste, der fore- 
kommer ved den norske kyst, den er dog ikke kjendt søn- 
denfor Tromsø. C. insculpta optræder alene ved Spits- 
bergen, Nordamerikas nord- og østkyst samt i Berings- 
havet. Begge arter forekommer sammen ved Grønland og 
ved Ruslands og Sibiriens ishavskyster. 
Radula hos c. inseulpta og c. striata adskiller sig 
ikke hvad tændernes form angaar fra hinanden. Derimod 
er der en paafaldende afvigelse mellem kroens kalkplader 
hos to arter. GC. insculpta har gule og temmelig 
tykke kalkplader; hos c. striata er de derimod forholdsvis 
mindre, brune i kjærnen og halvt gjennemsigtige ud mod 
disse 
randen. 
') Ann. Mag. Nat. Hist., ser. 4, vol. 20, 1877, p. 492. Smitt (op, 
cit. p. 140) anser ligeledes cylichna striata, Brown og cylichna 
scalpta, Reeve, for identiske. 
*) Belcher, Last of arctic Voyages, App., vol. 2, 
32 HPN 2. 
%) Rep. Invert. Mass., ed. 2, 1870, p. 223. 
*) Arch. f. Naturgesch., vol. 51, 1885, p. 293. 
%) Zool. Jahrb., vol. 6, 1899, p. 363. 
*) Dijmphnatogtets zool. bot, Udbytte, 1886, p. 470, 
1855, p. 392, tab. 
110 
C. propinqua (type specimens). We have also had from 
Prof. Leche specimens of his C. (Utriculopsis) densistriata, 
which seems to be a dwarf form of C. striata. It may 
possibly, however, have the right to be called a distinct 
species. 
Jeffreys!) distinguishes between O. insculpta, Totten, 
and UO. striata, Brown; but we suppose he is mistaken in 
considering C. occulta, Mighels, and C. scalpta, Reeve, to 
be synonymous with striata. Leche, and after him Posselt 
in his survey of the Brachiopoda and Mollusea of Green- 
land, makes OC. insculpta, Totten, C. reinhardti, Møller, 
and OC. scalpta, Reeve, distinct species. As regards the 
last of these, it is easily identified, from Leche's drawing 
(Pl. I, fig. 22), with C. striata, Brown; but we cannot 
find out what there is to separate the first two. We think, 
however, that Leche has misunderstood Reeve's scalpta, for 
judging from Reeve's drawing?), it is not identical with 
striata, Brown, but with insculpta, Totten, 
Aurivillius also mentions C. reinhardti, C. insculpta, 
and OC. scalpta from the Vega Expedition. The first of 
these is identical with our striata, while his nsculpta and 
ours seem to agree. The third species, scalpta, on the 
other hand, it is impossible to identify, as its name only 
is mentioned. Gould and Binnney's Bulla occulta*) is cer- 
tainly identical with C. insculpta, which may also be said 
of the same authors’ Bulla solitaria. Krause’s C. striata 
from the Bering Sea*), and his occulta from Spitsbergen ®) 
also belong to this species. Collin seems to include the 
two species under the name C. reinhardti*); but according 
to Posselt, his specimens from the Kara Sea exactly cor- 
respond with Leche’s description of C. scalpta, and must 
therefore be identical with C. strata, Brown. 
C. striata is the only one of these two species that 
occurs on the Norwegian coast, and it is not found south 
of Tromsø. GC. msculpta occurs alone in Spitsbergen, on 
the north and east coast of N. America, and in the Bering 
Sea. Both species occur together in Greenland, and on 
the Arctic shores of Russia and Siberia. 
The radula in OC. insculpta does not differ from that 
in C. striata as regards the form of the teeth; but on the 
other hand there is a striking difference between the cal- 
careous plates of the gizzard in these two species. In 
C. insculpta they are yellow and rather thick, while in 
C. striata they are comparatively smaller, brown at the 
nucleus, and semi-transparent towards the edges. 
1) Ann, Mag. Nat. Hist. ser. IV, vol. XX, 1877, p. 492. Smith 
(1. c., p. 140), also considers C. sfriata, Brown, and C. scalpta, 
Reeve, to be identical. 
*) Belcher, Last of Arctic Voyages, App. vol. 2. 1855, 
XXXIT, fig. 3. 
5) Rep. Invert. Mass., ed. 2, 1870, p. 223. 
*) Arch. f. Naturgesch., vol. LI, 1885, p. 293, 
5) Zool. Jahrb., vol. VI, 1892, p. 363, 
5) Dijmphna Togtets zool. bot. Udbytte, p. 470, 1886. 
5302 
DY2, 
p. PI. 
