i:i:riJSA. 229 



tusrly plicate: rxtcrnal-liasal aiiLrlr "f aperture very pnimim-nt ; lip 

 tliin, contracted in the middle. Alt. .".';, diam. I. 1 ; lino - /'//. . 



China (Largilliert). 



ttuWt itn'o/nt't PHI i,., Xoitschr. 1'. Mai., 1851, p. 64. 



Has nnK'h affinity to B. convoluta In>cclii, hut shorter, striated 

 above and below, and base of the aperture suddenly dilated (Ph.). 

 The generic position is very doubtful. Perhaps it is a OyHchna. 



R. SEMIMI.IM Philippi. Unjiynred. 



Shell small, subcylindrical, a little attenuated toward the base, 

 very smooth, milk-white; spire short, obtuse, distinct; aperture 

 linear, a little dilated at the base, obsoletely folded. Alt. li, diam. 

 I lines (PA.). 



Manila. 



Bnlla seminulum PHIL., Zeitschr. f. Mai., 1851, p. 64. 



This species is like B. obstricta Old., B. obtusa Mont , but differs 

 in having the base of the shell attenuated and the aperture much 

 narrower (Ph.). 



Subgenus PYRUNCULUS Pilsbry, 1894. 



Sao H. & A. ADAMS, Gen. Rec. Moll., ii, p. 21, Sept., 1854, type 

 S. pyriformis A. Ad. Conf. SMITH, Ann. Mag. Nat. Hist. (4), ix, p. 

 354, 1872. 



Not Sao Billberg, Enum. Ins., p. 135, 1820 (Crustacea), nor Sao 

 Barrande, 1846 (Trilobita) ; nor Sao Kolliker, 1853 (Siphonophor<t, 

 Forslcaliidcei). 



Shell pyriform, wide below, narrowed above, the aperture as long 

 as the shell, and of similar shape, columella thickened. Spire de- 

 pressed and rather shallowly or deeply umbilicated. Surface gen- 

 erally with some basal spiral striie. Soft parts unknown. 



Adams' name Sao being thrice preoccupied, has been changed to 

 Pyrunculus. The systematic position of the species cannot be defi- 

 nitely settled until the soft parts are known Adams considering 

 the group a subgenus of Atys, Smith placing it under Oylichna, 

 while Fischer has Sao as a subgenus of Tornatina. The characters 

 of the shells' apex seem more like Jtetiwi than (.'////V/wa, so that it 

 may be advisable to retain it as a section of that genus for the pres- 

 ent. 



R. PYRIFORMIS A. Adams. PI. 33, fig. 68. 



Shell small, ovate, greatly dilated at the base, gibbose, shining, 

 white, smooth, pellucid, apex truncated, obsoletely longitudinally 

 16 



