KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. wN:o [6. 83 
Jaw (fig. 37) reddish brown with shallow sinuosity. Radula (fig. 38) with 170 
teeth in one row: 70.15.1.15.70, the marginals with subequal cusps. 
° 3 ie 15 
Fig. 38. Teeth from the radula of Macrochlamys suturalis n. sp. X 306. 
Sitala wilcoxi (Cox). (Figs. 39—41). Atherton (March 1913), 2 sps, max. d. 
4.5 mm; Malanda (March 1913), 2 sps, max. h. 3, d. 3.8 mm; Cedar Creek (April 
1913), 5 sps, max. h. 3.9 mm. 
An examination of the anatomy and the radula of this species made apparent 
its close affinity with Sitala anthropophagorum Hepiey (1894), from British New 
Guinea. The radula (fig. 39) has more than 150 rows of teeth, each row containing 
about 300 teeth, most of them uniform in shape and showing a denticulated outer 
margin (4—5 denticles) and a bicuspid apex. The formula is about 150.3.1.3. 150. 
All teeth have narrow, produced basal plates, and are extremely small, the largest 
Ny f 
MY 
Fig. 39. Radula of Sitala wilcoxi Cox. (a). 6 one of the inner, c one 
of the outer teeth, seen from outer side. 
measuring 8 ». in length. The median tooth has a strong median cusp, at the base 
of which stand, somewhat obliquely, two smaller denticles, and farther away two 
other, still smaller, ones. 
The jaw presents a curved segment without any projections, quite similar to 
the figures given by Gopwin-AustEN (1884, pl. VIII, figs. 1 d, 2 d). 
In the genital organs (fig. 40), there is also a close resemblance to S. anthro- 
pophagorum (cf. Heptey 1894, pl. XXVI, fig. 24) as well as to S. attegia (cf. Gov- 
win-AusTEN 1884, pl. VIII, fig. 2 f.). There are no coecal appendages nor a flagel- 
lum in the male apparatus, and the female one has a spermatocyst and a dart sac. 
The arrangement of the pallial organs (fig. 41) exhibits a twice reflected urethra, 
thus showing the characteristics of the group Sigmurethra, and a triangular nephri- 
dium extending beyond the pericardium. Except for two principal, nearly parallel 
