
SUTER : DESCRIPTION OF A NEW SPECIES OF SEPARATISTA, ~ 66 
2 Ti Oi ae 7 most likely not quite adult, and therefore 
y little disunited. The genus Separatista is 
a to the fauna of New Zealand. The species is nearly allied to 
S. separatista, Dillw., and perhaps S. grayi, Ad., but may at once be 
distinguished by the beautiful and complicated sculpture. 
Hedley” suggests that “ Trichotropis gabriel, P. and G., T. grazi- 
lenta, Braz., and 7. torcularis, T. Woods, may conveniently be 
distinguished from the typical northern Trichotropis, and assembled 
under Separatista.” I fully share Mr. Hedley’s opinion with regard 
to the forms mentioned by him, but there is one stumbling block in 
the way as far as New Zealand is concerned, and this is Trichotropis 
inornata, Hutton (=clathrata, Sow.). If Trichotropis is an exclu- 
sively northern genus, the question arises: What is inornata? It is 
quite true that the membranaceous fringes of Trichotropis are wanting, 
but otherwise the shell has all the characters of that genus, and I 
cannot make up my mind to class it under Separatista. The species 
of the latter genus seem to be exceedingly variable, but to include our 
T. inornata would necessitate retorming Gray’s diagnosis of Separatista 
to such an extent, that it would almost become a synonym of Tricho- 
tropis. So far as I can ascertain, the operculum and the animal of 
Separatista are unknown, and the same is the case with 7’. inornata, 
so that with the little knowledge that we possess at the present time 
we have to admit the occurrence of TZvichotropis not only in the 
northern, but also in the southern hemisphere. It is represented by 
about seven species in Japan, and there seems to be no reason why it 
should not also be found in New Zealand. 



1. Records Australian Museum, Vol. iv, No. 3, p. 126. 
