1908.] NATURAL SCIENCES OF PHILADELPHIA. 569 



Section LUOHUPH^DUSA Pilsbry. 

 Clausilia degenerata Pils. 



Clausilia nakadai degenerata Pils., Proc. A. N. S. Phila., 1904, p. 818, pi. 52, 

 fig. 12; pi. 53, fig. 22. 



The inadvertent use of Mr. Nakada's name twice in Clausilia makes 

 it necessary to modify the later apphcation as above. The former 

 siibspecific name will become the name of the species, while what was 

 formerly described as typical C. nakadai requires a new name, which, 

 being later, becomes subspecific. I am indebted to Mr. Hirase for 

 calling my attention to the duplication. 



The type of C. degenerata is No. 87593 A. N. S. P., from No. 1205 

 of Mr. Hirase's collection. 

 C. degenerata nakadiana n. n. 



Clausilia nakadai Pils., Proc. A. N. S. Phila., 1904, p. 818, pi. 52, figs. 9, 10, 

 11; pi. 53, figs. 18, 19. Not C. variegata \av. nakadai Pils., Proc. A. N. S. 

 Phila., 1902, p. 328. 



The type of C. d. nakadiana is No. 87594 A. N. S. P., from No. 1205a 

 of Hirase's catalogue. 



Section FORMOSANA Bttg. 



This section has much affinity with Hemiph(Bdusa and the closely 

 related Megalophcedusa, having the same long and narrow type of 

 clausilium, which, however, is slightly thickened at the end. The 

 palatal structure is primitive — a series of well-developed, subequal 

 plicae. 



Three Formosan species known may be distinguished as follows : 



a. — Shell rather obesely fusiform, the diameter contained 3^ to 4J 



times in the length; whorls 9 to 11, the later ones closely and 



finely striate. 



b. — ^Whorls convex; later whorls with waved striae; southern 



Formosa. 



c. — Color pale yellowish or very pale brownish (pi. XXXII, 



figs. 4, 8, 9); C. formosensis A. Ad. 



c\ — Color dark reddish or purplish brown (pi. XXXII, figs. 



1, 2, 3), C.f. hotawana Pils. 



b^. — Wliorls flattened; striae fine, close and straight; dark colored y 

 northern Formosa (pi. XXXII, figs. 7, 10, 11), 



C. sioinhoei H. Ad. 

 a\ — Shell long and narrow, the diam. contained 5 or 6 times in the 

 length; whorls 11 to 14, the later ones flattened, with inter- 

 rupted striae (pi. XXXII, figs. 5, 6), . . C. taiwanica Pils. 

 Clausilia formosensis H. Ad. PI. XXXII, figs. 4, 8, 9. 



This species belongs to southern Formosa, while C. sioinhoei has been 

 found only in the northern end of the island. In color it varies from 



