Helix hypopolia Pfeiffer, 1853

Pl. 5, fig. B

Pfeiffer, 1853a. Monographia heliceorum viventium, 3: 68.

Type material: Syntypes (2), NHMUK 20140868 (dry shell material); ex Museum Cuming (Acc. no. 1829) .

Label details: ‘n.sp. H. Hypoplia P. N. Zeland’—in in Pfeiffer’s handwriting.

Type locality: ‘Nova Seelandia’ (Pfeiffer, 1853a: 69).

Previous illustrations of type material: Reeve (1852 [in 1851–1854]: pl. 130, fig. 787); Pfeiffer (1854 [in 1852–1860]: pl. 161, figs. 18–20); Tryon (1886 [from Reeve 1852]: pl. 54, fig. 15).

Remarks: Helix hypopolea Reeve, 1852 and H. hypopolia Pfeiffer, 1853 are based on the same type material, which H. Cuming had obtained from the Australian-based naturalist Frederick Strange. Pfeiffer evidently intended to publish the original description of this species in the Proceedings of the Zoological Society of London issue for 1851 (see Reeve 1852 [in 1851–1854]: species 787; Pfeiffer 1853a: 69, 1854 [in 1852–1860]: 496), but publication was delayed until 1854 (Pfeiffer 1854b: 148), and was pre-empted by Reeve (1852 [in 1851–1854]). Authorship of this species has generally been attributed to Pfeiffer (e.g., Hector 1873: 9; Hutton 1880: 6; Suter 1913b: 626; Powell 1979: 315; Spencer et al. 2009: 216), but Reeve (1852) has priority. There has been considerable confusion over the identity of this species among New Zealand workers as noted in the entry for hypopolea Reeve (above).

Taxonomy: Helix hypopolia Pfeiffer, 1853 is an objective junior synonym of Phacussa hypopolea (Reeve,

1852) N. syn.