. Bulletin of the Natural History Museum Zoology. Fig. 34. Nuculana commutata. Lateral and dorsal views of a shell, from Sarsia station S29 from the West European Basin. Scale = 1mm. Maximum length of present specimens is Internal morphology () The internal morphology differs little from that ofN. acuta (). The most noticable differences are that N. commutata has less attenuate palps with fewer palp ridges and larger adductor muscles than does N. acuta. Other differences between the two species are that inN. commuteita the ridge from the umbo to the antero-ventral margin is
. Bulletin of the Natural History Museum Zoology. Fig. 34. Nuculana commutata. Lateral and dorsal views of a shell, from Sarsia station S29 from the West European Basin. Scale = 1mm. Maximum length of present specimens is Internal morphology () The internal morphology differs little from that ofN. acuta (). The most noticable differences are that N. commutata has less attenuate palps with fewer palp ridges and larger adductor muscles than does N. acuta. Other differences between the two species are that inN. commuteita the ridge from the umbo to the antero-ventral margin is more marked, the apices of the concentric ridges are less broad, the postero-dorsal margin is not so raised and the shell is somewhat less elongate in relation to its height. These differences are of degree and at that point where separation into species rather than subspecies is a subjective judgement. Never- theless, these differences are more marked than those between N. commutata andN. ////WcaCarrozza 1987 (paratypes BMNH 1995213 examined by JAA), a species that has been recently described from the northern Adriatic Sea (Carrozza, 1987). In contrast^ commutata. Fig. 35. Nuculana commutata. Internal morphology as seen from the right side of a specimen from Sarsia station S29 from the West European Basin. For identification of the parts see text-figure 7, p. 106. Scale = 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 Natural History Museum (London). Andover : Intercept
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