Grillotia australis n. sp and G-pristiophori n. sp (Cestoda : Trypanorhyncha) from Australian elasmobranch and teleost fishes

Two new species of Grillotia are described from elasmobranch and teleost fi shes from south-eastern Australia. G. australis n. sp., from the Australian angel shark Squatina australis. Regan, most closely resembles G. smarisgor a (Wagener, 1854) and G. angeli Dollfus, 1969, differing from both species in the presence of smaller bulbs, two or occasionally three hooks in each i ntercalary row in the basal region, reduced to one in the metabasal region compared with four or five hooks in the metabasal region of G. smarisgora a nd a single hook in G. angeli, and in the limited extent of the band of hoo klets on the external surface in the basal region of the tentacle, a region which is covered with hooks in G. smarisgora. Plerocerci of this species w ere found in the mackerel Trachurus declivis (Jenys) (site not known) from Tasmania. G. pristiophori n. sp., from the saw sharks Pristiophorus cirratu s (Latham) and P. nudipinnis Gunther, most closely resembles G. spinosissim a Dollfus, 1969 in possessing a scolex covered with spiniform microtriches, but differs in having six rather than five hooks in each principal row, no intercalary hooks and by possessing a band of hooklets on the external sur face of the tentacle which diminishes distally into a single file, rather t han persisting as a band eight to nine files wide. G. pristiophori is the f irst trypanorhynch to be recorded from saw-sharks.