. Breviora. BREVIORA No. 133 Lanistcs. Tn L. bolfancanus (Fig. 1 C) the dorsal surface of the posterior ehaniber ditt'ers from that of PUa in being liroader anteriorly. The ratio of the length of the j)osterior elianiber to the anterior chamber is approximately :1 to The anterior chamber is considerably longer than in Pila and is triangular in shajie. The main axis of the anterior chamber in Lanistcs is also oriented so that it is continuous with the axis of the ]iosterioi' Figure 1. Senii-diagraninuitic sketch of the dorsal surface of the kidney in five species of Pilidac:
. Breviora. BREVIORA No. 133 Lanistcs. Tn L. bolfancanus (Fig. 1 C) the dorsal surface of the posterior ehaniber ditt'ers from that of PUa in being liroader anteriorly. The ratio of the length of the j)osterior elianiber to the anterior chamber is approximately :1 to The anterior chamber is considerably longer than in Pila and is triangular in shajie. The main axis of the anterior chamber in Lanistcs is also oriented so that it is continuous with the axis of the ]iosterioi' Figure 1. Senii-diagraninuitic sketch of the dorsal surface of the kidney in five species of Pilidac: (A) Afropomus halanoideus, (B) Pomacca paludosa, (C) Lanistcs holtaneaniis, (D) Maiisa cornuarieiis, (E) Pila fjlobosa. The posterior chamber (p) and the anterior clianilier («) of each kidney illustrated arc oi'iented as in Figure Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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