246 
PATAGONIAN EXPEDITIONS ! PALAEONTOLOGY. 
Distribution: Navidad, Matanzas, Tubul and Lebu, associated with 
Pyrula hombroniana, said to be from the Navidad beds (Phil.). Re- 
corded also from the Cretaceous of Tumbez. Moericke (1896, p. 394) 
questions this fact. 
Affinities : Among the numerous Tertiary species of Bulla , it is hard 
to point out a particular one to which this one shows the closest affinities. 
It seems to me that B. striatissinia Deshayes (1864, p. 636, pi. 38, f. 
20-22), from the Eocene of the Paris basin might be compared with B. 
remondi , although the form of B. striatissima is slightly shorter, the mouth 
a little more produced upward and the spiral sculpture much finer. An- 
other species that might be compared is B. conoidea (Deshayes, p. 622, 
pi. 39, f. 24-26), from the Oligocene of Europe, but the latter is a little 
more inflated and less cylindrical and the apex is less distinctly excavated. 
173. Bulla patagonica v. Ihering. 
PL XXXVII, Fig. 8“' c . 
1897 B. p. v. Ihering, in: Rev. Mus. Paul, v. 2, p. 271, textfig. 8. 
Shell subcylindrical, a little narrowed above. Apex deeply umbilicated, 
funnel-shaped with a blunt edge ; whorls hidden. Surface with spiral 
striae in the lower part of the shell ; the striae are wanting in the upper 
part. Mouth elongate, narrow above, very slightly produced upward, di- 
lated below the middle. No fold on the columella. 
Height, 12 mm, diameter, 6 mm; another one: Height 10 mm, di- 
ameter, 4.5 mm. V. Ihering gives : Height, 1 1 mm, diameter, 5.5 mm. 
Remarks : This species is closely allied to the preceding in general 
form, although it seems to be a little shorter (rel. of H. : D. = 2 : 1 or 
2.2:1). The chief difference is the development of the spiral lines, 
which are distinct only in the lower half or one-third of the last whorl. 
In most individuals there is no trace of the spiral lines in the upper part, 
but in some of them, especially young ones, there is a slight indication of 
these lines, but they are always much less distinct than in the lower part. 
Sometimes there are a few of these lines (1-3), more distinct from one 
another, near the upper extremity. The strise (impressed lines) are more 
remote from one another than in B. remondi. 
Record of specimens : Mouth of Santa Cruz River, 109 sp ; Arroyo Gio, 
2 casts. 
