60 Transactions. 



Pollicipes* spinosus (Quoy and Gaimard). 



Anatifa spinosa Quoy and Gaimard, Voyage de V Astrolabe, pi. xciii, 

 fig. 17. Pollicipes spinosus Darwin. 1851, p. 324, pi. vii, fig. 4 ; 

 Hutton, 1879, p. 329 ; Gruvel, 1905, p. 20, fig. 24 ; Jennings, 1915, 

 pp. 286, 291, figs. 3a, 36. Pollicipes sertus Darwin, 1851, p. 327, 

 pi. vii, fig. 5 ; Gruvel, 1905, p. 22, fig. 25 ; Jennings, 1915, 

 pp. 286, 291. Pollicipes darwini Hutton, 1879. p. 329 ; Gruvel, 

 1905, p. 21 ; Jennings, 1915, pp. 286, 291. 



Specific Diagnosis.— " Capitulum with one or more whorls of valves 

 under the rostrum : upper pair of latera only slightly larger than lower 

 latera : membrane covering the valves (when dried) light yellowish-brown : 

 scales of the peduncle of unequal sizes, unsymmetrical, arranged in rather 

 distant whorls." (Darwin.) 



Localities. — Kaikoura (collector unknown) ; Port Pegasus, Stewart Island 

 (collector unknown) ; Russell, Bay of Islands (W. R. B. Oliver) ; Tauranga 

 (W. R. B. Oliver) ; Godley Heads (W. R. B. Oliver) ; Stewart Island (W. 

 Traill) ; Kaikoura (L. S. Jennings) ; Oamaru (L. S. Jennings) ; St. Clair, 

 Dunedin (L. S. Jennings) ; Taylor's Mistake, Banks Peninsula (L. S. Jennings). 



The reasons for considering P. sertus Darwin and P. darwini Hutton 

 to be synonyms of P. spinosus Quoy and Gaimard have already been fully 

 discussed. (See Trans. N.Z. Inst., vol. 47, p. 291, 1915.) 



Family BALANIDAE. 

 Balanus tintinnabulum (Linnaeus). 



Lepas tintinnabulum Linnaeus, 1758, Systema Naturae, ed. 10, p. 668. 

 Balanus tintinnabulum Darwin, 1854, p. 194, pi. i, figs, a-l; 

 pi. ii, figs, la-lo: Gruvel, 1905, p'. 211, figs. 230-33: Pilsbrv, 

 1916, p. 54. 



Specific Diagnosis. — " Shell varying from pink to blackish-purple, often 

 striped and ribbed longitudinally : orifice generally entire, sometimes toothed. 

 Scutum with the articular ridge broad and reflexed. Tergum with the basal 

 margin generally forming a straight line on opposite sides of the spur." 



' Var. (8) concinnus : Globulo-eonical ; walls finely ribbed : dull purple, 

 tinged and freckled with white ; scutum, with a broad, hooked, articular 

 ridge, with an extremely sharp plate-like adductor ridge, and with a cavity, 

 bordered by a plate, for the rostral depressor muscle." (Darwin.) 



Locality. — Hull of tk Terra Nova," Lyttelton Harbour (C. Chilton). 



Balanus decorus Darwin. 



Balanus decorus Darwin, 1854, p. 212, pi. 2. figs. 6a, 66 ; Gruvel, 

 1905, p. 214; Chilton, 1909, p. 670, and 1911, p. 311. pi. 58. 

 figs. 1-3 ; Pilsbry, 1916, pp. 53, 77. 



Specific Diagnosis. — " Parietes pale pink ; radii rather darker. Scutum 

 with a small articular ridge. Tergum with longitudinal furrow very shallow 

 and open ; basal margin on both sides sloping towards the spur." (Darwin.) 



Localities. — British Museum, from New Zealand (type) ; New Brighton 



* In accordance with the rules of priority, Pilsbry uses the generic name Mitella 

 in place of Pollicipes (see Pilsbry, 1907, p. 4. and 1911, p. 33).— C. < '. 



