452 Transactions. 



Notosetia gen. no v. 



This is provided for the " Setia " of Suter, and I name as type Barleeia 

 neozelanica Suter. I consider it a heterogeneous assemblage, but consider 

 it wiser to provide quite a new name than encumber Neozelanic litera- 

 ture with another unnecessary extra-limital innovation. I have studied 

 the European " Setia" and could easily match some of the shells with 

 Neozelanic forms, but as each European species has one or more generic 

 names it would be difficult to fix a limit, and some of the Neozelanic forms 

 differ widely. Further, the particular forms that conchologically agree 

 are known, in the few cases that animal or opercular features have been 

 studied, to disagree. The " Gordian solution " I therefore favour, and 

 solicit criticism. In a like case Thiele referred such things to " Rissoa," 

 and upon my remonstrance urged, " I know quite well they are not Rissoa, 

 but I don't know what they are."' 



Nozeba gen. no v. 



I recorded as Recent the species Rissoa emarginata Hutton, previously 

 known only in the fossil state. I now provide for this species the above 

 genus-name, and fix it as type. A second species is Rissoiiut coulthardi 

 Webster. These two species are classed by Suter in Rissoina under the 

 section Zebina H. and A. Adams. 



The species of Zebina differ generically from those of Rissoina, which- 

 ever subgenus of the latter is compared. I collected a species of the true 

 Zebina at the Kermadecs, and was at once struck by its peculiar Eulimoid 

 aspect, and found later that some of the species had been described under 

 the genus-name Eulima. 



A recent consideration of the varied forms classed under Rissoina showed 

 no other species easily compared with the two above named. 



Dardanula gen. nov. 



I propose this name to replace Dardania Hutton, 1882, which is pre- 

 occupied by Dardania Stal. Suter has dismissed this as a synonym of 

 Eatoniella Dall, which he has ranked as a subgenus of Rissoina. The re- 

 ference to Rissoina simply because the operculum shows an internal clavi- 

 form nucleus is a degradation of conchological characters, as the association 

 of shells by means of operculum alone would lead to chaos. If the oper- 

 culum- of Dardanula be compared with that of Rissoina it will be seen to 

 differ widely, whilst from shell characters the two would never be ranged 

 together. Thiele has shown that the genus Eatoniella has been utilized to 

 cover diverse elements, examination of the animal showing different generic- 

 types to be thereunder confused. The operculum of Dardanula differs at 

 sight from that of Eatoniella, so that generic distinction must be allowed. 



Anabathron foliatum (Suter, 1908). [P. 204.] 



When this species was described by Suter he placed it in the genus 

 Rissoa, while he referred another shell to Anabathron, describing it as 

 A. gradatum. I cannot exactly place the latter species, but it is certainly 

 not referable to Anabathron, whilst the former just as decidedly is. 



The genus Anabathron is well defined, and seems to be as yet only known 

 from east Australian and Neozelanic waters. The species comprising the 

 genus at present are : Anabathron contabulatvm Frauenfeld, New South 



