4. 
Fintay.— Molluscan Fauna of Target Gully. 499 
The record of Cymatium minimum (Hutt.) should be erased from al 
Awamoan lists, and probably from most others, the type of that see 
(which has been found E Mr. Marwick, and which, through his courtesy, 
I have examined) having a tall, slender spire, and in scul be and 
appearance арар Къ from the form which is common at most 
zons, and which really represents a new species of Austro- 
triton, very seule related to the Recent A. parkinsonianum Pen The 
shell ‘des cribed from Target Gully by Marshall and Murdoch as 
sands. Not thing like them occurs at Target Gully, and both these records 
should be expunged. The existing records of Borsonia from the Awamoan 
(and often other horizons) are mostly based on iractured examples of 
Suters Pt ractus riensis or allied species (whic iscussed 
later). І have not yet seen any example of a true Sound from the 
Awamoan. 
Corbula canaliculata Hutt. and C. humerosa Hutt. are listed as separate 
species, but are really opposite valves of the same species the 
nalicu I ha 
specimens of C. ca that I have, from many Oamaru localities, are 
right valves, and all of C. humerosa are left valves; all my double-valved 
shells are humerosa on one side and canaliculata on the other. The two 
forms always occur together. Suter, when examining the type of C. hume- 
rosa, mistook the ligament process for a a cardinal tooth, and the dental 
representing the same species disappears. The specific name humeros 
has two years' priority, and should be used to cover all these forms. 
The shells classed in Bela, ractus, and Borsonia by Suter are 
unsatisfactorily sank in several cases, but their true position is very 
difficult to determine. Ptychatractus tenuiliratus Sut., Bela infeliz Sut.,. 
and В. canaliculata Sut., haan their true location may be, are 
undou y ing i tails of general shape and ornament, 
conoidal many-whorled protoconch, columellar plications, and ct 
ded ose to the s ssmann has re iculata 
. са 
Sut. to аери D in the family Fusidae, but the sinus shows that 
these shells are Turrids: possibly the shell Cossmann studied was wrongly 
labelled. Suter’s location in Bela auct.—for which, by the way, Iredale 
has advocated the substitute Oenopota (6a)—is also unhappy, as this genus 
has a different protoconch, and no columellar folds. "date (14) has 
Bde aud 
Borsonia from the Waihao greensands.  Tate's species agrees very well 
with P. tenuiliratus Sut. in sculpture, apex, and plaits, but | is more slender. 
More recently, каа (10) has гуга | Daphnella columbelloides 'T.- Woods, 
which he places in Buchozia, and this shell seems still closer to the 
Neozelanic P. йб алая Sut. Evidently a homogeneous group of species 
is represented by these shells, and their peculiar nature will "probably 
