gag ae Pilsbry-Bequaert, The Aquatic Mollusks of the Belgian Congo 601 
The Acavide and their immediate allies appear also to be an Austral 
group, present in Australia, Ceylon, Madagascar, South Africa and 
South America, and unknown in northern regions, either recent or fossil. 
They are large snails, not likely to be overlooked. 
It appears, therefore, that the Ethiopian and Neotropical faunee 
contain one series of land and fresh-water mollusks belonging to groups 
known in the northern continents as recent,Tertiary or Mesozoic forms, 
and another series of groups unknown anywhere along the northern 
routes of inter-continental migration. This second group consists partly 
of conspicuous forms, not likely to be transported far without actual 
land communication. These facts seem to lend support to the hypothesis 
of a Mesozoic “Western Gondwana” or Brazilo-Ethiopian continent, 
‘“Archhelenis” as it has been termed by H. von Ihering. That the evi- 
dence is largely negative must not be lost sight of. It can by no means 
be considered conclusive until we have a far more complete knowledge of 
land and fresh-water fossils of Tertiary and especially of Mesozoic 
deposits of Asia and North America. 
Recent Additions to the Land Mollusks of ihe Belgian Congo 
Since the publication of the senior author’s ‘Review of the Land 
Mollusks of the Belgian Congo,’ in this Bulletin, Vol. XL, 1919, a number 
of papers have appeared containing additional information on the sub- 
ject. For the convenience of the student, we subjoin a list of these 
publications and indicate the new terrestrial forms described therein. 
Connolly, M. 1922 (November). ‘Notes on African non-marine Mollusca, with 
descriptions of many new species.’ Ann. Mag. Nat. Hist., (9) X, pp. 485-517, PI. 
Ty. 
Gulella (Paucidentina) dupuisi, p. 497, Pl. x1v, fig. 39. Nsendwe. 
19238. ‘Notes on African non-marine Mollusca, with descriptions of many new 
species (cont.).’ Op. cit., (9) XI, pp. 8345-362, Pl. 1; (9) XII, pp. 633-659, Pl. xrx. 
Nothapalus ugandanus, p. 354, Pl. 1, fig. 26. Buhamba and Burunga. 
Nothapalus adelus, p. 355, Pl. 1, fig. 27. Between Lake Mutanda and Lake Kivu. 
Subulina viridula, p. 359, Pl. 1, fig. 25. Mukanda near Lake Kivu. 
Pseudoglessula mutandana, p. 347, fig. 2 and Pl. 1, fig. 23. Lake Mutanda. 
Pseudoglessula perobtusa, p. 347, Pl. 1, fig. 8. Burunga, Mt. Mikeno, 6,000 ft. 
Pseudoglessula (Kempioconcha) pilsbryi, p. 349, new name for Kempia kivuensis 
Preston, 1913, Rev. Zool. Afric., III, p. 53; not Ena kivuensis Preston, 1913, op. cit., 
p. 50, which, accerding to Connolly, is also a Pseudoglessula. 
Pseudopeas burunganum, p. 644, Pl. xrx, fig. 41. Burunga, Mt. Mikeno (type) 
and Lake Mutanda. 
Opeas thomasi, p. 653, Pl. xrx, fig. 8. Mukanda near Lake Kivu (type) and 
Mbarara to Kigezi (Uganda). 
Dupuis, P. 1922. ‘Notes malacologiques concernant la faune de I’ Afrique con- 
tinentale et insulaire. I.’ Ann. Soc. Zool. Belgique, LIII, pp. 46-48. 
