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NATURAL SCIENCES OF PHILADELPHIA. Q5k 
The species is placed by Von Martens in Acusta, a subgenus of 
Nanina, judging from shell alone. 
Helix convicta, Cox. 
Australia. Received from Dr. Cox by Dr. W. D. Hartman. 
Jaw high, arcuate, thick; ends but little attenuated, blunt; no 
median projection to cutting edge; anterior surface with 7 sepa- 
rated, stout ribs. 
Lingual membrane (pl. XXI., fig. 7) with 830—1—30 teeth, with 
10 laterals. The centrals and inner laterals have no side cutting 
points. Transition to marginals as usual (see last species). Mar- 
ginals low, wide, with one short, broad, bifid inner cutting point, 
and one small, side cutting point. 
Helix (Dorcasza) pyrozona, Phil. ® 
“ Outside the great wall of China.” Lieut. Wild, U. 8S. N., to Dr. 
W. D. Hartman. 
Jaw as in Pomatia (see above, H. Sieboldtiana). Ribs few, stout. 
Lingual membrane (pl. XX., fig. 8), with 28—1—28 teeth, with 
10 perfect laterals. It is difficult to distinguish any cutting points 
on the obsolete side cusps of centrals and inner laterals. The 
general characters of the teeth are asin H. Szeboldtiana (see above). 
Stenogyra hasta, Pfr. 
Cuba. Received from Mr. Bland. 
Jaw (pl. XX., fig. 2) low, arcuate, ends somewhat attenuated, 
blunt; no median projection to cutting margin; anterior surface 
with numerous delicate strie. 
Lingual membrane (pl. XX., fig. 3) as usual in the genus (see 
ante, p. 187). There are 18—1—18 teeth. 
The species was formerly described as a Balea. This exami- 
nation of the jaw and dentition shows its correct position to be 
in Séienogyra. 
Macroceramus turricula, Pfr. 
Lomas de Camoa, Cuba. Mr. Arango to Mr. Bland. 
Jaw as usual in the genus (see ante, p. 223). Ribs 35. 
Lingual membrane (pl. XX., fig. 9) as in M. Gosset, Pfr. (see 
above), not as in Cylindrella. 
Cylindrella (Gongylostoma) elegans, Pfr. 
Habana, Cuba. Mr. Arango to Mr. Thomas Bland. 
Lingual membrane (pl. XX., fig. 6) with 12—1—12 teeth, ar- 
