; ) 
VRIGSAFYEENSP PD EST OENSEIENOSTIVT EUT NNISYRGA RR SUG SVARAT RIE BUGT BCNE 219 
kanten upp till bucklornas topp, hvar och en upptill tvär; 
bucklorna stora, uppsvälda, trubbiga, sammanstötande; perl- 
morn på skalens insida blekt blåglänsande; lås- och sidotänder 
mycket starka. 
Förekomst. Kina, Hongkong. 
Gen. Anodonta Lam. 
[HS 
39. Anodonta calipygos Kob. var. humerosa nov. (Taf. 6, fig. 33.) 
Differt a typo wmbomibus tlatis, humilibus, tumidis, marginem 
conche superiorem vix prominentibus; long. 55, alt. 33, crass. 28 mm. 
Förekomst. Japan, floder Jokogava, nära Tokio. 
Tillägg. 
Mr. W. H. Dall i Washington har benäget meddelat mig 
en 1 september-häftet för i år af Proceedings of United States 
National Museum införd uppsats, »Reports on the mollusca of 
the Commander Islands, Bering Sea, collected by Leonhard 
Stejneger in 1882 and 1883: by W. H. Dall». -Om naturbeskaf- 
fenheten på dessa öar säger hr D: >I am informed by dr. 
Stejneger that the coast of the Commander Islands, especially 
Bering Island, is largely rocky, composed chiefly of sandstone, 
whieh extends in rocky flats from the shore at the base leyel 
of erosion by the waves for quite a distance seaward; from 
small capes or projections a reef invariably extends seaward, 
often of voleanic rock. The shore is thus composed of a suc- 
cession of small bays or bights, none of which afford a har- 
bour, and only one or two an anchorage even for small craft. 
The beaches at the head of these bays are rocky, or composed 
of shingle with an occasional strip of sand, the latter espe- 
cially where streams fall into the sea. There are several lakes 
at the northern part of Bering Island; the soil is covered with 
that moss-like coating of sphagnum, reindeer lichen, and Em- 
petrum which is characteristic of those regions, with an ad- 
mixture of the usual boreal herbage, dwarf willows, Vacceinum, 
