PORAMINIPERA— HERON-ALLEN AND EARLAND. 89 



The specimens bear considerable resemblance to the starved form of Webbina 

 clavata, which occurs in some of our North Sea dredgings, but these support the 

 delicate tubular extension by incorporating a sponge-spicule at intervals in the 

 side of the tube, whereas the Antarctic specimens which we are describing are 

 entirely free. 



The longest fragment measures I'SOmni. with a maximum breadth •04 mm. 

 It has no proloculuni. Diameter of proloculum in another specimen (broken), 

 measuring -97 in length, was -09 mm. 



96. Hi/pemmmina novae-zealandiae, nom. nov. PI. III. figs. 1-5. 

 Teclmitella mestayeri, Cushman, 1919, RFNZ. p. 59-5, pi. Ixxiv, fig. 4. 



Station 6. 



Test free, elongate, circular in section, slightly tapering, straight tendmg to 

 arcuate. Built almost entirely of sponge-spicules in two layers, the outer layer 

 laid longitudinally, the inner transversely. The outer layer is evidently con- 

 structed suljsequently to the inner layer as the oral end of the shell often 

 exhibits the inner layer only of the last few courses of spicules laid down. 

 Surface variable, sometimes smooth and neatly constructed, at others with the 

 points of the spicules projecting in the direction of the proloculum. Occurring 

 in two forms, (o) megalospheric, with a bulbous proloculum, followed by a con- 

 striction, or sometimes by several constrictions at intervals, (6) microspheric, 

 tapering very gradually from the proloculum, which is missing in all the 

 specimens we have observed, but must lie quite small as compared with form {a). 

 Form (6) attains twice the length of form («). Interior of the test more or 

 less sub-divided by constricted rudimentary septation, visible externally in some 

 cases as a slight depression. 



Station 6 in the N.Z. area was characterized by the abundant specimens of 

 this curious and somewhat abnormal species. We were at first inclined to assign 

 them to. or near, Technitella raphanus, Brady, but an examination of Brady's 

 type-slide in the British Museum shows essential differences. The examination 

 of specimens in balsam reveals the fact that the cavity of the N.Z. specimens 

 is not nionothalamous but is divided by rudimentary septa into chamberlets. 

 This brings the form into close affinity with H. subnodosa, Brady, and the spicu- 

 liferous habit being found in other species of Hypermnmina there is less reason 

 to doubt the assignations of the N.Z. specimens to that genus. We have not 

 observed the development of the spiculiferous habit in H. subnodosa to an equal 

 extent with the other species, but specimens from S.W. Ireland (550 fms.) 

 exhibit a tendency to incorporate spicules in large quantities, together with the 

 sand-grains employed. 



There can be very little doul)t that the two small specimens described by 

 Cushman from N.Z., under the name of Technitella mestayeri, represent young 



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