202 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
on conchological characters, without corroboration of anatomical details, 
their value is extremely doubtful ; moreover, the removal of these 
species from the Testacellide without anatomical evidence is un- 
warranted. I would make exception in favour of Colpanostoma and 
Tayloria, which are here retained as subgenera, and this notwith- 
standing Dr. von Martens’ conjectures that they may be juvenile 
states of Streptaxis.' Specimens of Colpanostoma Leroyt in my 
possession do not bear out this conjecture, for they are undoubtedly 
mature. Bourguignat also reconstructed the genus Streptavis, raising 
it to family rank; after eliminating /A’s Artemonide he split up the 
remainder into four genera, viz. :—1, Streptaxis, Gray, with S. contusus 
as type, containing ‘‘ S. Funcki, S. epistylium, S. Dunkert, ete.,” and 
doubtfully S. nobilis, S. Blandingiana, S. rimata, S. Monrovia, ete. ; 
2, Gonaxis, Taylor (= Lustreptaxis, Pfr.+- Lamelliger and Oophana, 
Ancey), containing most of the African species and the American and 
Asiatic forms with parietal teeth; 8, MJarconia, Bourg., containing 
Ennea lata, Smith, and £. vitrea, Morel., with Streptaais enneordes, 
Mart., and two new species, S. gibbosa and S. recta; and 4, Edentu- 
lina, Pfr., which is considered a section of Exnea by Dr. von Martens. 
Further additions to the group proposed by Mons. J. Mabille were: 
the genus Pseudartemon,® for a single species, P. Bourguignati, and 
the genus Stremmatopsis,’ also for a single species, S. Povrier?. Here, 
again, we have no anatomical evidence, and since the shell of the 
former sufficiently resembles Scolodonta to warrant its inclusion in 
that genus, I am constrained to reject Pseudartemon, while Strem- 
matopsis appears to me only of sectional value, and I have consequently 
added it as a fourth subsection of Hustreptaxis. Dr. von Mollendortt 
created a section, Jficrartemon, for a species from the Philippine 
Islands,* the inclusion of which in Streptaais appears to me somewhat 
dubious, but pending an examination of the soft parts it may be 
advisable to retain it. Finally, Dr. von Martens proposed a section, 
Imperturbatia (allied to Artemon), for the reception of four new species 
from the Seychelles.® 
The distribution of Streptaxis is somewhat peculiar. The species 
range over the warmer parts of Asia, Africa, and South America. 
Asia is the richest in species, being credited with no less than 77, 
distributed as follows:—India and Burma 24, Indo-China 25, China 13, 
including one doubtful record, Ceylon 4, Malaya, including the Samui 
Islands, 11, Nicobar Islands 1, Andaman group 8, and Philippine 
Islands 1, Africa, including the six Mascarene Island shells, has 48 
species, of which four are doubtful records. In East Africa they range 
from Somali in the north to Zanzibar in the south, while they extend 
westwards through British Central Africa and the Congo to the 
Cameroons and the Guinea Coast. South America has only 37 species, 
including three doubtful records; they range from Brazil to Guiana, 
1 Deutsch. Ost-Airika, vol. iv (1897), p. 32. 
* Bull. Soc. Malac. Fr., vol. iv (1887), p. 126. 
3 ‘Loc. cit... p. 132. 
4 Berichte Senck. Naturf. Ges., 1890, p. 190. 
5 Mittl. Zoot. Mus. Berlin, vol. i (1898), p. 12. 
