. Bulletin of the Natural Histort Museum. Geology series. . Fig. 8 Hexites paradoxus sp. nov. Line drawing of external features of BMNH PD9410; scale bar = 1 mm. iFig. 9 Nematopora hihernica sp. nov. Line drawing of external features of BMNH PD9430); scale bar = 1 mm. ^^ARATYPES. BMNH PD943I-9449; BELUM K3145-3146; all from the same locality and horizon as the holotype. Derivation of trivial name. From the LnUnhihemka meaning reland. 'able 3 Measurements oiNematopora hihernica (in mm). N=19. NM Mn Mx CVw CVb JW koi \S2 176 176 172 165 170
. Bulletin of the Natural Histort Museum. Geology series. . Fig. 8 Hexites paradoxus sp. nov. Line drawing of external features of BMNH PD9410; scale bar = 1 mm. iFig. 9 Nematopora hihernica sp. nov. Line drawing of external features of BMNH PD9430); scale bar = 1 mm. ^^ARATYPES. BMNH PD943I-9449; BELUM K3145-3146; all from the same locality and horizon as the holotype. Derivation of trivial name. From the LnUnhihemka meaning reland. 'able 3 Measurements oiNematopora hihernica (in mm). N=19. NM Mn Mx CVw CVb JW koi \S2 176 176 172 165 170 )IAGNOSlS. Nematopora with delicate dendroid zoarium. Branches ilichotomise irregularly, are straight in outline and subcircular in are developed in four to five longitudinal lows on one surface only. Autozooecial apertures are oval and urrounded by small acanthostyles. Reverse surface barren, with [our to five longitudinal rows of faint pustules. pESCRlPTlON. Colonies are small, delicate, erect with irregularly lichotomising branches. The largest fragment examined measures in length. Branches are straight (range of diameter from mm to ), sub-circular in cross-section. Branch width increases slightly prior to bifurcation. Interapertural areas may bear one to two rows of small acanthostyles which surround autozooecial apertures. The reverse surface is barren, either smooth or with small acanthostyles occurring in four longitudinal rows (Fig. 7). Autozooecia are arranged quincuncially in four to five longitudi- nal rows, inegularly spaced within and between rows. Autozooecial apertures are oval to ellipical in shape, often nar- rower distally. are steep-sided and shallow distally. Discussion. From the study area only 22 fragments ofNematopora hihernica were found. All are hollow silicified fragments in which only the surface has been rep
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