CQLOCENTRUM. 269 
produced beyond the suture, and its edges are very thin and shortly expanded ; the opening is 17 millim. 
high and 16 millim. broad, irregularly rhomboidal, with an obtuse angle at the base, but rounded above. 
The columellar plait inside the aperture is rather strong, pale orange, and ascends in a straight oblique 
line. The costule of the columellar axis are numerous, about as broad as their interstices, and descend 
in a straight line. 
Fig. 27 represents a younger individual, which has not yet lost so many whorls. 
Hab. ¥%i. Guatemata: Livingston, in the Bay of Honduras (0. Stoll). 
2. Celocentrum championi, sp.n. (Tab. XVI. figg. 26, 26 a, 5, c.) 
One broken specimen, somewhat intermediate between C. gigas and C. clathratum ; 14 millim. in diameter, of 
a yellowish-grey colour, white at the suture; costule more feeble and numerous, above 100 in the whorl 
before the last, the interstices of the same width, or scarcely twice as broad; spiral striee very faint, not 
crossing the costuls (fig. 26 5). The 3-4 terminal whorls of equal diameter. An angular line and beneath 
it a very shallow furrow at the base of the last whorl, more feeble near the aperture. Costule at the 
outside of the columellar axis very faint. Aperture protracted 4 millim. beyond the suture, obliquely 
oval, angulate above and below, 134 millim. in oblique height and 11 millim. in breadth; peristome 
thickened, expanded, white. 
SIiab. W. Guatemata: Cerro Zunil (Champion). 
8. Celocentrum clathratum. (Tab. XVI. figg. 29, 29 a, b,c, 30.) 
Celocentrum clathratum, v. Mart. Sitz.-Bericht d. Ges. naturf. Freunde, Berlin, 1886, p. 161°. 
More turrite than fusiform, in this respect resembling the preceding (C. championi), but of a paler yellowish- 
grey colour, the costule also feeble and somewhat more oblique in the lower whorls, 87-90 in the whorl 
before the last, also somewhat unequal, the interstices mostly twice as wide as the costule ; the spiral 
strie fine, traversing not only the interstices, but also the costule themselves and giving to them an 
irregular, waved appearance. Whorls scarcely convex, 10 remaining in the adult shell, the terminal 3-4 
of equal diameter, the last at the base with a very feeble angular line, which quite disappears near the 
aperture. Umbilical rim arcuated. Costul of the columellar axis very faint, scarcely visible. Aperture 
protracted 43 millim. beyond the suture, obliquely oval, somewhat angulated above and below ; peristome 
thin, a little expanded. Length of the truncate shell 54, diameter 14 millim.; aperture 12 long, 
9 broad. 
Hab. W. Guaremata: Hacienda Buenavista in Upper Cholhuitz, Costa Cuca, at an 
elevation of 3500 feet above the sea (0, Sto/i +). 
Dr. O. Stoll has made a drawing of the living animal (fig. 30) and describes it as 
follows :—‘ Body slender, higher in its posterior part, flat and obtusely rounded 
behind; face higher than broad, convex, obliquely sloping, produced into a sort of 
trunk. Length of the body 38 millim., breadth 17; length of the upper feelers 9, of 
the lower 2; height of the face 7, breadth of the same 5 millim. Colour of the body 
whitish-grey, with a slight bluish hue; on the face and on the anterior part of the 
back are small oblong dark brown spots in longitudinal rows, corresponding to the 
tubercles of the skin; at the lateral edges very pale brown roundish spots; underside 
of the foot whitish-grey ; feelers slender, pale brown ; eyes small, black.” The animal 
moves by extending the fore part of the body to a considerable length and then the 
hinder part with the shell is advanced by contraction. In dry weather it buries itself 
in the ground. 
