90 -TERRA NOVA ' EXPEDITION. 



individuals of our form. We regret our inability to use his specific name, but 

 Cushman himself havmg employed the name mestayeri for another species of 

 Hyperammdna, the name T. mestayeri must lapse. 



The species varies greatly in size, the megalospheric form ranging between 

 2 and 7 mm. in length, and the microspheric between 2 and 5 nnn. 



MARSIPELLA, Xorman. 



97. Alarsipella eloufjata, Norman. PI. Ill, figs. 10-12. 



Marsipella elonc/ala, Norman, 1878, H. p. 281, pi. xvi, fig. 7 (3 on the plate). 

 Brady, 1884, FC. p. 264, pi. xxiv, figs. 10-19. 



Stations 2, 6. 



Confined to the N.Z. area. At Station 2 only two specimens were found, 

 one entirely built of sponge-spicules, the other constructed, as normally, of coarse 

 sand-grains. At Station 6, where it was common, two very distinct forms occiu-, 

 one constructed with great neatness, entirely of spicules, the other with the body 

 of the test built of coarse sand-grains, but having produced tapering extremities 

 entirely spicvilar. 



The spiculiferous form is unquestionably the Dioxeia ncharcli of de Folin 

 (de F. 1887, RR. p. 115, fig. 11 and "Sous les Mers," 1887, p. 130, fig. 17). 

 Trioxeia edwardsi de Folin (" Sous les Mers," p. 130, fig. 16) appears to be 

 nothing more than an abnormal form, presenting three apertures. Some of the 

 N.Z. individuals are almost identical with it, and one, which we figui'e from 

 Station 6, is clearly the same organism. 



98. Marsipella cylindrica, Brady. 



Marsipella cylindrica. Brady, 1882, BKE. p. 714 ; 1884, FC. p. 265, pi. xxiv, fig.s. 20-22. 

 Heron- Allen and Earland, 1912, etc., NSG. 1912, p. 388, pi. v, figs. 8, 9 ; 

 pi. vi, figs. 8, 9. 



Stations 6, 9, 13, 16, 22, 27, 29, 40, 49, 52. 



Occurs in both areas most abundantly and the finest specimens at Station 6. 

 It reaches a considerable length and is almost entirely spiculiferous. At Station 29 

 the individuals again use the spicular selective construction. At Stations 22, 27 

 and 40, sand and spicules are employed indifferently, at the remaining Stations 

 sand only. 



99. Marsipella chapmani, nom. nov. PL III, figs. 8, 9. 



(1) Marsipella cylindrica, Chapman, 1914, FORS. p. 62, pi. ii., fig. 15. 



Stations 2, 3, 6. 



Test monothalamous, constructed entirely of sponge-spicules, usually imbroken, 

 arranged with a pronounced smistral twist. Normally .slightly curved, but occa- 

 sionally strongly arcuate. Tapering gradually from the initial end, which is closed 



