. Bulletin of the Natural History Museum Zoology. NEW SUBFAMILY AND GENUS ACHATINIDAE 17 shell has less luster than in this latter species. This peculiar microscopic sculpture on the upper whorls is determinative. Soft anatomy. Alcohol preserved specimens available 2/dissected 2. Congo Republic: MRAC 1/1; Zaire: MRAC 1/1. These apparently are the only such specimens extant. Both had small body masses and were withdrawn far into their thin shells because they were collected during the dry season and were inadequately drowned before preservation. However, most of the soft parts were successfully
. Bulletin of the Natural History Museum Zoology. NEW SUBFAMILY AND GENUS ACHATINIDAE 17 shell has less luster than in this latter species. This peculiar microscopic sculpture on the upper whorls is determinative. Soft anatomy. Alcohol preserved specimens available 2/dissected 2. Congo Republic: MRAC 1/1; Zaire: MRAC 1/1. These apparently are the only such specimens extant. Both had small body masses and were withdrawn far into their thin shells because they were collected during the dry season and were inadequately drowned before preservation. However, most of the soft parts were successfully extracted with only minimal damage to one shell. Body colour and texture as in L. mollicella. Upon exposing the reproductive tract (Fig. 14), the most noticeable anatomical feature is that both the unusual hull- shaped penis (P) and the large basal vas deferens (BVD) show through the thin, nearly transparent, but substantial, penis sheath (PS). Typical of the Callistoplepinae, the PS also enshrouds the very short penial retractor (PR). As in L. mollicella and Callistoplepa barriana, this latter inserts far posterior on the large right columellar retractor (RCR). Also conspicuous is the apparently inordinately long bipartite apical vas deferens (AVD), with a nearly evenly broad muscular basal portion and a thin-walled, somewhat undulant apical portion. When the PS was cut vertically and the edges pulled laterally, it was found to extend essentially to the base of the P. In the first dissected specimen, from Lukula, Zaire, the exposed, large BVD appeared out of proportion and excessively deeply wedged into the ventral surface of the P. Similarly, the navicular P, with its diagonal left ventrolateral orientation, seemed enigmatically distorted. But the second specimen, from Kayes, Congo Republic, ca. 180 km to the north, had almost identical proportions and alignment, thus essentially removing the suspicion that there had been exces- sive distortion. The relatively thin penial wa
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Keywords: ., bhlconsortium, bookcentury1900, bookcollectionbiodiversity, bookl
