Figure 1. Stirpulina ramosa. A in A cadaver unearthed: the anatomy of the Japanese living fossil Stirpulina ramosa (Bivalvia: Anomalodesmata: Clavagellidae) - the unique specimen in the collections of Emperor Shōwa

Figure 1. Stirpulina ramosa. A, the adventitious tube as seen from the dorsal aspect, and as received. The dotted area equals the probable posterior extent of the tube in life. B, a small stone embedded in the tube. C, the periostracum-lined pit of a detached stone. D, a scar on the side of the tube left by a large piece of bivalve shell. LV, left shell valve; PE, periostracum; PLE, sutured pleat in tube; WPT, watering pot tubules.