. Bulletin of the Natural History Museum Zoology. . Fig. 14 Nybelinia schmidti sp. nov. Scolex from Isurus glaucus. Scale bar=100|im. Fig. 15 N. schmidti sp. nov. Homeomorphous basal and metabasal armature. Scale bar=10 urn. and a distinctive basal armature is present (Fig. 17). The basal armature consists of about 11 rows with compact rose-thorn-shaped hooks, increasing in size (row 1-5: L=, B=, and row 6-11: L=, B=). From rows 12-14, the hook form changes to long, spiniform metabasal hooks (L=22-26) with a small base (B=); hsr basal=6-7, hsr metabasal=4-5. N
. Bulletin of the Natural History Museum Zoology. . Fig. 14 Nybelinia schmidti sp. nov. Scolex from Isurus glaucus. Scale bar=100|im. Fig. 15 N. schmidti sp. nov. Homeomorphous basal and metabasal armature. Scale bar=10 urn. and a distinctive basal armature is present (Fig. 17). The basal armature consists of about 11 rows with compact rose-thorn-shaped hooks, increasing in size (row 1-5: L=, B=, and row 6-11: L=, B=). From rows 12-14, the hook form changes to long, spiniform metabasal hooks (L=22-26) with a small base (B=); hsr basal=6-7, hsr metabasal=4-5. No complete strobila is present. The first acraspedote proglottids are wider than long (330 x 50) and slightly increasing in size (490 x 205). Other internal structures were not seen. REMARKS. Palm & Walter (1999) considered Nybelinia (Tentacul- aria) scoliodoni (Vijayalakshmi, Vijayalakshmi & Gangadharam, 1996) as a species of uncertain status due to an uncomplete original description and a strong similarity to Nybelinia indica Chandra. 1986. However, the present specimen confirms the validity of Tentacularia scoliodoni, and assigns the species to the genus Nybelinia Poche, 1926. Though the scolex measurements of the present specimen are smaller and the scolex and bulb ratios show differences to those given in the original description, the tentacular armature corresponds in detail with N. scoliodoni. The drastic change in form from rose-thorn shaped basal to spiniform metabasal hooks, with a size between L=8-l 1 in the basal and L=30, B=3 in the metabasal armature as given by Vijayalakshmi et al. (1996), is unique within the genus. As with the scolex size, the hooks of the present specimen are slightly smaller than those of the original description. However, Vijayalakshmi etal. (1996, figure 8) demon- strated minute hooks on the basal part of the tentacle, similar to those in rows 1-5 of the present specimen, and also indicated the charac- teristic change in TW along th
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