SYSTEMATIC 89 



In Vennstas cunninghami (Griffiths & Pidgeon), New Zealand, the cephalic tentacles are short and 

 stout and there are four pairs of short epipodial tentacles. 



2. Photinula coerulescens (King & Broderip). Two short cephalic tentacles. Epipodial tentacles 

 six pairs, slender, moderately long, and of approximately equal size (Fig. D, 4). 



3. Photinastoma taeniata (Wood). Two short cephalic tentacles. Epipodial tentacles four pairs, 

 rather short and stout and of equal size (Fig. D, 2). 



4. Venustatrochus georgianus n.g. and n.sp. Two long and slender cephalic tentacles. Epipodial 

 tentacles seven pairs, all slender, first two short, remainder long (Fig. D, 6). 



Fig. D. Epipodial processes in Trochoids. CT = cephalic tentacles, £T = epipodial processes and 0/> = opercula in: (1) 

 Calliostoma modestulum Strebel; (2) Photinastoma taeniata (Wood); (3) Solariella kempi n.sp.; (4) Photinula coerulescens 

 (King & Broderip); (5) Falsimargarita iris (Smith); (6) Venustatrochus georgianus n.g., n.sp. 



5. Falsimargarita iris (Smith). Two short and very stout cephalic tentacles. Epipodial tentacles 

 seven pairs, very short and stout and of equal size (Fig. D, 5). 



Eales (1923, p. 8) described F. gemma (Smith) as being similar but with the epipodial tentacles 

 scarcely distinguishable from the lobes of the epipodial fringe. 



6. Margarella expansa (Sowerby); also steineni (Strebel), bouveti n.sp., M. (Promargarita) tropi- 

 dophoroides Strebel and achilles (Strebel). All with short and stout cephalic tentacles and four pairs of 

 moderately long epipodal tentacles, which increase in size gradually from the front. 



7. Margarella antarctica (Lamy). Similar to the typical Margarella series listed above except for 

 five instead of four pairs of epipodial tentacles. 



Family TROCHIDAE 



Subfamily Calliostomatinae 



Genus Calliostoma Swainson, 1840 



Type (S.D. Herrmannsen, 1846): Trochus conidus Linn. 



The Magellanic Calliostomids seem to have more affinity with West American stock than with 



European typical members. As already mentioned, Calliostoma typically has three pairs of long, slender, 



epipodial tentacles, whereas the Magellanic modestulum has four. In the latter, also, the central tooth of 



the radula is narrow with a deep base and the laterals have the cusps on long slender necks. C. platinum 



Dall, 414 fathoms, California, has four long epipodial tentacles, and C. annulatus Martyn, California, 



has 'goose-necked' laterals. The New Zealand Venustas Cunningham (G. & P.) has four pairs of short 



epipodial tentacles, but the central and lateral teeth are more like those of typical Calliostoma. 



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