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MUSEUM OF COMPARATIVE ZOOLOGY. 
Patula striatella, Anrnoyy. 
This species, including Cronkhitet, has also been found in Wyoming and at 
Ogden Cafion, Utah: Nevada: Colorado. (Hemphill.) 
Patula Horni, Gass. 
Also Logan, Arizona. 
Microphysa Ingersolli, Bianp. 
Plate Ifl. Fig. 5. 
A better figure than that in Vol. V. is here given. 
Also found by Mr. Hemphill at Weston, Umatilla Co., Oregon : Mount Nebo, 
Wasatch Mountains, Logan Cafion, Utah. Also found by Mr. Ernest Ingersoll 
near Lawrence, Kansas, on the banks of the Kaw. 
Microphysa pygmea, Drap. 
Admitted as a universally distributed species (see p. 24), though not actually 
as yet received from the Central Province. Sharing the peculiarity of jaw 
with all our species of Microphysa, I have placed it in that genus. 
Microphysa conspecta, Brann. 
Plate Ill. Figs. 4, 6. 
Living specimens received from Dr. J. G. Cooper have enabled me to ascer- 
tain that this species has the jaw characteristic of Microphysa. My figure, 
drawn by camera lucida, gives the sixteen plates as they became actually dis- 
arranged under pressure, showing them to be separated and not forming one solid 
piece as in most of the genera. The central plates are not imbricated, and ap- 
pear lightly connected. The other plates appear to overlap laterally on their 
outer sides. The jaw is low, wide, slightly arched, the ends scarcely attenu- 
ated, blunt. 
There are 12—1-12 teeth on the lingual membrane. Centrals with long and 
narrow base of attachment: reflection small, with three cusps, the middle one 
much the largest, all bearing short cutting points. Laterals same, but bicuspid. 
Marginals low, wide, with two broad cusps, each bearing a broad, bifid cutting 
point. The centrals and laterals are quite like those of Pupa. 
A species of the Pacific Province also. 
Helicodiscus lineatus, Say. 
A universally distributed species, found over the Central Province, as stated 
in Vol. V. Specimens collected at Oakland, California, and in Idaho by Mr. 
Hemphill, quite want the revolving lines. 
