• 59 



tinuo, soluto, late reflexo, leviter incrassato. corneo-albido ; 

 lamellae modicae, superior marginalis, fere verticalis, inferior 

 valde oblique ascendens, sub-columellaris nulla ; plica principalis 

 carta, valida ; lunella conspicua, valida, arcuata. Alt. 41 

 millim. ; diam. max. 8-5 millim. ; alt. apert. g millim. ; kit. 

 apert. 9 millim. 



Habitat : South America. 



I regret not to be able to give the e.xact habitat of this 

 handsome species, the single specimen of which is in the 

 collection of Miss de Burgh, who kindly lent it so that it might 

 be figured and described. 



While dealing with these forms, a word with regard to 

 ' Bidiiims claiisilioides, Reeve,' may be of interest. This shell has 

 at various times been placed in Balca and Temesa. The former 

 is clearly erroneous ; with regard to the latter, the original species 

 so placed were anstvalis, Forbes, clausilioidcs, Reeve, and some 

 forms of Alopia. ]\Ir. Hedley has recently transferred the 

 former species to Pevrievia, and Mr. Pilsbry following this has 

 left dausilioidcs as the type of Temesa in his work on the Bulimoid 

 forms. 



This result appears to me to be very unsatisfactory. Australis 

 was the first species of Temesa, and therefore when it proved not 

 to be a Coeliaxis, as Mr. Hedley showed, it should have stood as 

 the type of the genus. It appears so for two reasons : firstly, 

 because Temesa has more than 20 years' priority over Perrievia ; and 

 secondl}', because aiistyaUs does not accord well with clausiliaefoymis, 

 Tapp.-Canefri, which is the type of this latter genus, though the 

 author's somewhat vague original description would cover it. 

 I think, therefore, that australis must stand under Temesa and 

 claiisilioides will require, if it is to be placed in a section by 

 itself, a new sectional name. 



EXPLANATION OF PLATE IV. 



j" Figure i. The shell life-size. 



Claiisiliii cvac, n. sp. -, Figure 2. Mouth of the shell x 2. 



(figure 3. The same seen from behind x 2. 



