135 987 
N. (Calon.) Powelli var. Vidovichi Grun. Grun. Wien. Akad. 1863, 
tab. XIII, fig. 4. 
Solitary in a sample without habitat. 
Area: S. America, Adriatic, Sumatra. 
— — var. Bartholomei Cl. A.S. Atl. tab. CLX, fig. 9. 
Found only in a sample from KKt. 
Area: West Indies, Porto Seguro, Bahia. 
117. N. (Calon.) siamensis Ostr. n.sp. Tab. nostr. I. fig. 11. 
L. 0,04mm., B. 0,016 mm. Strie 7,4 in 0,01 mmm. 
Linear elliptic with cuneate apices. Apical area broad, not 
dilated in the middle. Striz divided in two nearly equal parts by 
a hyaline line parallel to the margin. 
Only found in a sample from K Kt. 
This species surely is near to the form from Campeachy Bay figured 
in A. 8. Atlas tab. CCXII, fig. 16 (from Campeachy Bay) which is referred 
by Cleve to Nav. (Calon.) sectilis A.S. 
In tab. nostr. II, fig. 19 I have figured a fragment of a form, which 
certainly must also be referred to the form circle of Nav. (Calon.) Powelli. 
L. 0,09 mm, b. 0,024 mm, strie 7,4 in 0,01 mm. on the middle somewhat 
shortened and thus forming a central area in which two lunule are present. 
Found in a sample from K Kt. 
118. N. (Calon.) disticha A.S. Tab. nostr. Il, fig. 17. Cnfr. A. S. Atl. 
tab. CCXII, fig. 13. 
L. 0,043 mm., b.0,01 mm. Strize 9—10 in 0,c1 mm. not punctate. 
Solitary in a sample from KKt. 
Area: Zanzibar (Grtindler in A. 5S. Atl.). 
This form is near to N. (Cal.) blanda A.S., about which Cleve says 
(Syn. I, p. 62) that the strize are ,not distinctly punctate*. As A.S. how- 
ewer in the text of his Atlas tab. CCXII says about Nav. blanda, that he 
has always found his strie punctate and just for that purpose separated 
N. disticha from N. blanda, I thought it most correct to refer the present 
form to N. disticha A. S. 
Radiose. 
119. N. crucifera Grun. var.? capitata Ostr. Tab. nostr. II, fig..18. 
L. 0,031 mm., b. 0,012mm. Striz 10 in 0,01 mm. finely trans- 
versely lineated. 
Valve elliptical with almost parallel margins, rostrate-capitate. 
Strize in the middle slightly radiant, at the ends transversal, wanting 
in the apices. Apical area narrow, in the middle extended to a 
rhombical central area. 
KKt (2 samples). 
