— 144 — 



165. H. (Trat'hyn.) velata A. S. A. S.. Atl. tab. XLVI1I, fig. 36. 

 KKm, KKt, KMn— GLt (7 samples). 



Area: Gape Horn, Cape of good Hope, Madagascar, Mauritius, Ceylon, 

 King Georges Sound, Sumatra, Java, China, Japan, Sandwich Islands, New 

 Caledonia. 



In a sample from KCgN I have found a Nav. (Trachyneis) exactly 

 corresponding to the „fragliche Form" from North Celebes figured by 

 A. S. in Atl. tab. XL VIII, fig. 31. 



Gymatoneis Gl. 



166. C. sulcata Grev. A. S. Atl. tab. GGXII, fig. 44. 

 Found only in a sample from KKt. 



Area: Widely spread in warmer Seas. 



Van Heurckia Bréb. 



167. V. H. siatnensis Östr. n. sp. Tab. nostr. II, fig. 26. 

 L. 0,074 mm., b. 0,009 mm. 



Valve linear elliptical with rounded apices. Raphe strongly 

 asymmetric, enclosed between two silicious ribs, terminating in a 

 outwards reflexed point. Striæ very fine, parallel. I am not able 

 to see any longitudinal striation. 



KKm, TK (2 samples). 



This species surely is near to Van Heurckia vulgaris Thw. var. 

 asymmetrica Gl. (Gl. Syn. I, p. 122, tab. V, fig. 29) , but as it is char- 

 acteristic by its shape, the very asymmetrical raphe and the exceedingly fine 

 sculpture, I preferred to regard it as a separate species. 



Area of V. H. vulg. var. asymmetrica CL, which is recorded as „ brackish " : 

 Sierra Leone, Cameroon, Tasmania, Newark, N. Yers. fossil (Champlain epoch). 



168. N. subglabra Östr. n. sp. Tab. nostr. II, figs. 23 & 24. 



L. 0,059 mm., b. 0,016 mm. (fig. 23). L. 0,056 mm., b. 0,013 mm. 

 (fig. 24). Striæ inconspicuous. Valve rhombic-lanceolate. Central 

 pores distant, terminal nodi distant from the apices. 



With Zeiss Apoch. no. 2 and oblique illumination I think I have 

 seen a striation at a right angle to the apical axis; with moderate power 

 the valve gets a chagreen-hke appearance. In its central part the valve 

 shows like a tendence to a cicatrice-like figure, which is very conspicuous 

 in other specimens, as I have figured it in my fig. 24. The latter form is 

 somewhat smaller but otherwise on the whole agreeing with the former, 

 so that I have no doubt that they belong to the same species, perhaps as 

 hypotheca and epitheca. Moreover they occur both in the same sample 

 — from TK — and only in this. 



I am uncertain as to the systematic position of this species. 



