1891.] THE SHELLS OF PERAK. 345 



which, however, generic or sul)generic distinctions should not be based. 

 Palaina is to be restricted to those species which have a constriction 

 at the beginning or witiiin the first third of the last wliorl, but no 

 plaits or lamellse. D. superba having a strongly developed colurnellar 

 plait, cannot therefore be classed as a Palaina, but is a true Diplom- 

 matina, and by its short palatal plait visible above the aperture belongs 

 to the same seciion as the four preceding species. 



76. DiPLOMMATINA MIRABILIS, Grodw.-x\uSt. & G. NeV. 



Diplommatina mirabilis, Godw.-xA.ust. & G. Xev. P. Z. S. 1879, 

 p. 739, t.lx. figs. 4, Aa, 4b. 

 Bukit Pondong (Toionsend). 



Fam. PupiNiD.E. 



77. PUPINA AUREOLA, Stol. 



Pupina nureola, StoHczka, J. As. Soc. Beng. xli. 1872, p. 2G7, 

 t. X. figs. 11, 12 ; de Morgan, Bull. p. 66. 



Mt. Tcliora, Kinta valley {de Morgan). 



I received from the late Mr. H. Damon some specimens of a 

 Perak Pupina under the name of P. lahutensis, de Morgan, appar- 

 ently collected by that gentleman. The name was probably aban- 

 doned by the author, as it does not appear in his paper. One of 

 these examples corresponds exactly with the figure of P. aureola, 

 Stol., the others with P. loivi, de Morgan. 



78. Pupina lowi, de Morgan. 



Pupina lowi, de Morgan, Bull. p. 66, t. iii. fig. 3. 

 Lahat, Kinta valley (de Moryan). 



79. Pupina arula, Bens. 



Pupina arula, Benson, Ann. ilag. N. H. 2nd ser. xvii, p. 230 ; Pfr. 

 Mon. Pneum. Suppl. i. p. 95 ; Novitat. Conch, ii. p. 141, t. xxxvii. 

 fig. 7-9 ; Crosse, J. de Conch, xxvii. 1879, p. 340 ; v. Moildff. 1. c. 

 p. 314. 



Bukit Pondong {Townsend, Hunyerford'). 



The Perak form is smaller, 8 instead of 9 millim. in lensth, 

 comparatively more slender, sliowing a diameter of 4 millim. instead 

 of 5, or a proportion of axis to diameter of 2 : 1 instead of 9 : 5 ; the 

 apex is more pointed. It should therefore be separated as a variety : 



Var. PERAKENSis, V. jMcilldff. : testa minore, graciliore, apice 

 acutiore ; alt. 8, diam. 4 mm. 



80. Pupina artata, Bens. 



Bukit Pondong (Dr. Townsend fide Crosse) ; Kinta valley (de 

 Morgan). 



The small Pupina collected by Hungerford at Bukit Pondong, 

 which 1 took for P. artata, Bens., following Crosse, is certainly 

 different from Benson's species. It is smaller, the apex more pointed, 



