54 Prof. M‘Coy on a new Volute. 
noid process. The symphysis extends 3 inches 6 lines ; and the 
teeth-series occupies nearly one-half of the upper margin 
from the tip to the coronoid process, measuring 9 inches 4 lines 
in length, and the free part of the margin to the extremity of 
the coronoid process 10 inches. 
I know nothing of the other parts of the skeleton. 
On my first voyage across the Atlantic, I saw seven Globio- 
cephali swimming near the vessel, in 10° N. lat., on the 2nd 
November, 1850 (see my ‘Reise nach Brasilien,’ Berlin, 
1852, p. 43), and observed them for a long time. I suppose 
these animals would be of the same species as the one here 
described ; and if so, their whole external appearance is iden- 
tical with the figure given by Couch (Ann. Mag. Nat. Hist. 
1st ser. vol. ix. 1842, pl. 6). But as I did not see the under- 
side of the swimming animal, I cannot say whether this 
species has the white spot which is characteristic of the 
uropean animal. 
VITI.—On a new Volute. By Prof. M‘Coy. 
[Plate II. fig. 1.] 
Voluta Thatchert (M‘Coy). PI. II. fig. 1. 
Slender, elongate fusiform; greatest width (which is near 
the middle of the body-whorl) only half the length of the body- 
whorl; about ten tubercles on the penultimate whorl, slightly 
below the middle; only about seven on the shoulder of the 
body-whorl, from their being obsolete near the outer lip. Seven 
thick plaits on the columella, the two posterior smaller than 
the rest, which are nearly equal. Colour a white ground, with 
a row of elongate quadrangular spots on the suture and two 
broad spiral bands of hieroglyphic markings on the body-whorl, 
one just below the tubercles and the other near the anterior 
end; in front of the latter an irregular row of small quadrate 
spots ; all the markings pale yellowish brown (“burnt-sienna ”’ 
colour); traces of a yellowish reticulation between the bands. 
Length of the last three whorls 2 inches 10 lines, width 
1 inch 14 line; length of penultimate and antepenultimate 
whorls together 6 lines. 
I name this beautiful Volute after Mr. Charles M. Thatcher, 
of Melbourne, an enthusiastic and acute conchologist, who 
perceived the probable novelty of the species from the most 
obvious characters of the slender form and seven plaits to the 
pillar—a combination of characters separating it from all others 
IT know. Mr. Thatcher has added the specimen to the National- 
Museum Collection at Melbourne. The spire is broken. 
Habitat unknown. 
