732 MESSES. E, HEEOIS'-ALLEN AND A. EAELAND ON THE 



11 Stations. 



Generally distvibuted, but never in anj^ great abundance, excepting at Stn. 5, where 

 the specimens were numerous and characterized by a somewhat depressed shell in 

 which the umbilical beads usually found in the larger individuals are almost entirely 

 lacking. At most of the Stns. the specimens were of small to medium size and thin- 

 walled, but at Stns. 1, 2a, 7, 10, and 12 some very large individuals were obtained. 

 In most of the large specimens the umbilical portion is more or less obscured by a 

 deposit of secondary shell-matter in beads, the small tests giving no evidence of such 

 growth, which is presumably a characteristic of advanced age. 



447. Nonionina boueana, var. armata Brady. 



Nonionina houeana, var. armata Brady^ 1884, PC. p. 730, pi. cxv. fig. 9. 

 2 Stations. 



Single specimens at Stns. 2 a and .3. The occurrence of this variety at Kerimba is 

 interesting, inasmuch as the only published record so far as we are aware is that of 

 Brady, " abundant amongst the littoral sand of Madagascar." 



448. Nonionina pauperata Balkwill & Wright. 



Nonionina paiiperata Balkwill & Wright, 1885, DIS. p. 353, pi. xiii. figs. 25, 26. 



„ „ Heron-Allen & Earland, 1908, etc., SB. 1911, p. 3-12, pi. xi. figs. 16, 17. 



„ Heron-Allan & Earland, 1913, CI. p. 144.. 



2 Stations. 



One at each Stn. (2 b and 11), both small but quite typical. 



PoLYSTOMELLA Lamarck. 



449. Polystomella decipiens Costa. 



Po'ystomella decipiens Costa, 1853, etc., PEN. 1856, p. 220, pi. xix. fig. 13. 

 Fornasini, 1897-8, FlC. p. 17, pi. ii. figs. 11, 12. 

 Fornasini, 1899, PFI. p. 616. 

 Fornasini, 1900, FA. p. 400, text-fig. 50. 



2 Stations. 



Among the specimens of P. striato-punctata were many which in their unlobulate 

 periphery and inconspicuous retial processes, faintly indicating the septal lines, are 

 conveniently referable to this somewhat obscure species. Costa's species conveys the 

 impression of a depauperate form of P. arctica Parker & Jones, to which it bears 

 a strong superficial re.-eniblance. The most distinctive specimens were found at 

 Stns. 6 and 7. 



450. Polystomella striato-punctata (Ficbtel & Moll). 



Nautilus stnatu-pniictiitus Fielitel & Moll, 1798, TM. p. 61, pi. ix. figs, a, h, c. 

 Fohjstomella stnalo-pwictuta Parker & Jones, 1859, etc., NF. 1860, p. 103. no. 6. 



