C. VlLVENS 
Seguenzioidea and Trochoidea from French Polynesia 
Teleoconch up to 5.8 convex whorls, bearing 
numerous spiral, similar in size cords; adapical cords 
granular, abapical cords smooth; on last whorls, thin, 
prosocline axial threads between spiral cords. Suture 
visible, not canaliculated. 
First whorl convex, almost smooth with growth Unes 
poorly visible. On second whorl, low, poorly marked, 
axial folds appearing under suture. On third whorl, 
axial folds stronger, weakly prosocline, ending on 
adapical part with a rounded bead; 4 smooth, very 
thin, spiral cords appearing on abapical half. On fourth 
whorl, axial folds thinner, becoming thin threads, 
more numerous and more prosocline, covering ail 
adapical half; subsutural beads resolving in a 
subsutural, roundly granular, spiral cord; at begin of 
whorl, 4 thin spiral cords appearing on adapical half, 
increasing in number by intercalation under suture, 
giving a reticulate pattern by intersection with axial 
threads; abapical cords nearly smooth to subgranular. 
On last whorls, number of spiral cords reaching 16 to 
18; cords evenly spaced, distance between cords 
similar in size or slightly greater than cords, very 
different in shape on the two halves: cords of abapical 
half rather thin, almost smooth or slightly subgranular, 
elevated, with thin axial threads between them; cords 
of abapical half thicker, lower, granular, 
Aperture well rounded, slightly deflected on adult 
shell, with srnall, inner denticles ail around outer and 
inner lip; outer lip slightly flared at rim, inner lip 
meeting outer lip with a weak angle on subadult 
specimen. 
Columella arched, without tooth, with a basal flaring 
on subadult sample. 
Base convex, with up to 30 spiral cords; up to 50 axial 
threads around umbilicus; distance between spiral 
cords smaller than cords; cords of two outermost 
thirds smooth, thin; cords of innermost third wider, 
granular by intersection with axial threads. 
Umbilicus fairly wide (diameter 9% to 10% of shell 
width), deep, funnel shaped, with steep sloping, 
slightly concave walls, covered by a moderately thin 
columellar callus (broken on paratype) covered by 
numerous, irregular in size and shape granules; thin, 
weak axial threads inside. 
Colour of teleoconch nacreous white with pinkish 
sheen; protoconch pinkish brown (holotype). 
TW 
H 
W 
HA 
H/W 
H/HA 
holotype 
5.8 
14.5 
18.4 
6.7 
0.79 
2.16 
paratype 
5.6 
12.9 
19.5 
7.1 
0.66 
1.82 
Table 5. - Gazapolychoronos n. sp.: Shells measurements in mm for types. 
Discussion. The new species is provisionally placed 
into the Gaza genus, regarding its spiral sculpture, its 
rounded, prosocline aperture and the umbilical callus, 
although it has an only weakly descending suture and 
a poorly reflected peristome (features used by Simone, 
2006). 
The new species is rather close to Gaza daedala 
Watson, 1879 (Figs 68-69) from Fiji, but this similar 
in size species has much thinner, more numerous 
spiral cords on the whorls (25 spiral lines in 
penultimate whorl), has a higher H/W ratio (1.24), a 
body whorl with a weak spiral carina between middle 
and lower thirds and a smooth, not granular callus. 
Etymology. Bead-shaped object (Greek : xopovoQ 
and numerous (Greek : ttoAajÇ, àu), used as a 
noun in apposition - with reference to the granular 
umbilical callus. 
Acknowledgements 
I would like to thank P. Bouchet (Muséum national 
d'Histoire naturelle, Paris) for reading the manuscript, 
constructive advice and access to the malacological 
resources of the MNHN, and V. Héros (MNHN) for 
her help in finding various scientific papers. 
Also, I am very grateful to A. Salvador (Natural 
History Muséum, London) for her help for her help to 
search material in the NHMUK collections and to get 
photographs of types and information about them. 
T also would like to thank G. Poppe and J. Sarino 
(Conchology, Inc., Philippines) for the kind 
permission to use the types photographs they hâve 
sent. 
Figures 59-69. Scale bars = 5 mm. 
59-60. Thysanodonta cf aucklandica Marshall, 1988, Tuamotu Archipelago, 889 m [TARASOC stn DW33891 
6.8 x 5.5 mm. 
nwi Caypofyctonmos n. sp., Société Islands. 61-64. Holotype MNHN (24977), 580-618 m [TARASOC, stn 
n-A n AO^ 1 " 63 ' l4 ' 5 X 18,4 mm; 64 ‘ Detail of the granular callus. 65-67. Paratype MNHN (24978), 520-572 m 
[TARASOC, stn DW3497], 12.9 x 16.5 mm. 
68-69. Gaza daedala Watson, 1879, holotype NHMUK (1887-2-9-346), Fiji, Kandavu, 1128 m, 20.6 x 17.0 mm 
lotographs courtesy of Phil Crabb, NHMUK Photographie Unit. 
20 
