Figure 3. Elasmobranch tooth terms. 3.1 and 3.2. Example and terms of Tofino Basin Raja sp. teeth. 3.1.1. Subcrown/subroot view, GSC 124516; 3.2.1. Profile view and 3.2.2. Occlusal view, GSC 124517. Scale bar = 2.0 mm. 3.3. Terms for a hypothetical elasmobranch tooth similar to Isurolamna and other Tofino Basin specimens. 3.3.1. Lingual and basal view; 3.3.2. Labial view; and 3.3.3. Profile view. 3.4 and 3.5. Example and terms of Tofino Basin Family Squalidae teeth. 3.4.1 and 3.5.1. Lingual views; GSC 124521 and 124522; scale bar = 2.0 mm.  3.6 to 3.12. Stages of elasmobranch root vascularization. 3.6.1. Anaulacorhize stage; 3.7.1. Anaulacorhize stage with a concave lower labial root face; 3.8.1 and 3.9.1 Pseudo-polyaulacorhize/anaulacorhize stage; 3.10.1. Hemiaulacorhize stage; 3.11.1 Holaulacrohize stage; and 3.12.1. Polyaulacorhize stage. (3.6.1 and 3.10.1 to 3.12.1 modified from Cappetta 1987 (fig. 21), and 3.7.1 to 3.9.1 modified from Johns et al. 1997). This figure set also is reproduced with the permission of the Minister of Public Works and Government Services Canada, 2004, and courtesy of Natural Resources Canada, Geological Survey of Canada.