72 "BNDEAVOUU" SCIENTIFIC im-.sII.ts. 



Ihih. — A living specimen and a separate right valve were 

 trawled Sept.-Oct. 1913, in 10U— 250 fath., south from Grabo 

 Island. With them were associated Argobuccinum retiolum, 

 Gyprcea umbilicata, Sowerby, Scaphella papillnsa var. kenyoniana, 

 Brazier, and 8. magnified, Chemnitz. 



Cassidea stadialis, sp. nov. 



(Plate x., fig. 4.) 



Cassidea turgida, Hedley (not Reeve), Mem. Austr. Mus., iv., 

 1903, p. 330, pi. xx'xvi., fig. 1. 



A pair of this species, taken by the "Thetis" Expedition, 

 was doubtfully referred to G, turgida, Reeve. Now that my 

 acquaintance with it has been improved by examining numerous 

 similar specimens from a wide range of localities, 1 consider it 

 as distinct and undescribed. From C. turgida it differs as 

 already remarked by larger size and a smooth inner lip. Some 

 might regard it as a form of 0. pyrum, Lamarck, the interpre- 

 tations of which are various. Tryou went to the extreme of 

 regarding G. pyrum as identical with C. paucirugis, Menke, and 

 as a variety of < '. achatina, Lamk. It is well to select Kroner's 

 Gassis, tig. 25, as the proper expression of ( '. pyrum rather than 

 Kieuer's fig. 30 or Reeve's discordant figures in the " Concholo- 

 gica Iconica." I cannot exactly match Kiener's fig. 25 with an 

 actual specimen, but it is approached by examples from New- 

 Zealand. By this standard C. stadialis differs from G. pyrum 

 by larger size, absence of angles or tubercles on the shoulder. 

 absence of spiral grooves on the base and presence of wrinkles on 

 the columella lobe. 



It may be characterised thus: — 



Shell large, thin, smooth, inflated, ovate-acuminate. Colour 

 viuaceous pink, traversed by four evanescent spiral bands of rufous 

 blotches, apex lemon, mouth white except on the outer lip, where 

 four pair of chestnut splashes represent the spiral bands of the 

 exterior whorls, five plus a smooth two-whorled protoconch. 

 Sculpture: — the body whorl is quite smooth, the antipenultimate 

 and previous whorls arc decussated by line dense spiral threads 

 and obliquegrowth lines, these disappear on the penultimate. Canal 

 short, recurved, separated from the body whorl by a broad im- 

 pressed furrow which winds beneath the columella lobe into a 

 capacious spiral false umbilicus. At the tip of the canal opens a 

 minute axial perforation. Outer lip slightly but abruptly ascend- 

 ing at the insertion, moderately expanded and reflected. Inner lip 



