Beu: Evolution of Janthina and Reduzia 
131 
Figure 6. Reduzia lutea (Bennett), living animals in aquaria. (A-B) two views of same specimen, showing irregular float bubbles, and 
egg capsules beneath float; collected at Minnie Waters, near Lismore, New South Wales (reproduced with permission of Anthony Healy, 
Sydney). (C) specimen collected on beach in northern New South Wales, showing relatively large juvenile, presumably male specimen 
(arrowed) on foot of large female specimen, beneath female’s float; located against blue Physalia specimen at right (reproduced with 
permission of Denis Riek, Brunswick Heads, New South Wales). Scale bar 10 mm, applies to all images. 
Figure 5 (facing page 130). Fiving animals in aquaria. (A) Janthina janthina (Finnaeus), collected on Arina Beach, Heraklion, Crete, 
Mediterranean, showing partially contracted snout and forked cephalic tentacles, propodium between float and tentacles, snout resting in lip 
sinus, weak spiral grooves in base of shell, and small amount of ianthinin purple dye at right below snout. (B) Janthina pallida Thomson, 
all data as for Fig. 5A, showing float with pink egg capsules beneath, and snout partially expanded; part of float of another specimen 
visible at left. Faint spiral colour bands on this shell are unusual. (C) Janthina umbilicata d’Orbigny, collected on beach in northern New 
South Wales, Australia, showing long, narrow float as in J. exigua Famarck, weakly expanded head and propodium (top left), and egg 
capsules beneath float. (D) Janthina janthina , all data as for Fig. 5C, odontophore and teeth visible in tip of expanded snout. (E) Janthina 
globosa (Swainson), all data as for Fig. 5C, showing float, anatomy essentially as in J. janthina , expanded head resting in lip sinus, forked 
cephalic tentacles partly visible, barnacles attached to Janthina shell, and pink eggs beneath float (A-B, reproduced with permission of 
Dimitris Poursanidis, Heraklion, Crete; C-E, reproduced with permission of Denis Riek, Brunswick Heads, NSW). Scale bars 10 mm. 
