. Bulletin of the British Museum (Natural History) Zoology. Fig. 22 L. pustulosa argentinae: Left lateral view of shell from Atlantis II, Sta. 247, and detail of hinge plates of right and left valves of the holotype. (Scale = 1 mm).. Fig. 23 L. pustulosa argentinae: Lateral view of specimen from left side with shell removed to show arrangement of body organs. (Scale = 1 mm). For identification of parts see Fig. 5. The basic body form while similar to that of L. p. pustulosa has several slight differences (Fig. 23). The adductor muscles are larger and the posterior, in particular, is more round
. Bulletin of the British Museum (Natural History) Zoology. Fig. 22 L. pustulosa argentinae: Left lateral view of shell from Atlantis II, Sta. 247, and detail of hinge plates of right and left valves of the holotype. (Scale = 1 mm).. Fig. 23 L. pustulosa argentinae: Lateral view of specimen from left side with shell removed to show arrangement of body organs. (Scale = 1 mm). For identification of parts see Fig. 5. The basic body form while similar to that of L. p. pustulosa has several slight differences (Fig. 23). The adductor muscles are larger and the posterior, in particular, is more rounded in outline than in the previously two subspecies. The labial palps have fewer (7-12) but broader ridges and the number of gill filaments (8-13) is also less. Posterior to the foot, the inner demibranchs appear to interlock and provide a channel for the faeces between the anus and siphon. There is a large byssal gland. The nervous system is well developed with large visceral and cerebral ganglia. The pedal ganglia are also large and lie high in the foot. The smallest specimen seen with developing gonads was mm long. The ova number varies from 55 ( mm total length) to 169 ( mm total length) and the egg lengths within the individual containing the largest ova varied from 150-180 urn. In this individual ( mm total length), some eggs had been released and were lying cradled in the gill filaments close to the siphon. In the course of growth, the anterior margin becomes more. 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 Farn, Alexander E. London : Butterworths
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