76 Mr. W. Saville Kent on the Foraminiferal 



being finely granulate, with here and there a few larger 

 quartz grains or spicular fragments. The most remarkable 

 deviation, however, is associated with the form of the test 

 itself, which consists of a wider, compressed, and semicordate 

 distal expansion or capitulum mounted on an abruptly sinuous 

 and somewhat nodose pedicle. Ilie contour, as a Avhole, of 

 this aberrant type so closely corresponds in shape and size with 

 that of a single calcareous tube of the Polyzoon Angmnaria 

 spatidata, found abundantly in the same neighbourhood, that 

 the possibility is suggested of the Foraminifer having seized 

 upon such a tube, in its deserted state, as a basis for the con- 

 struction of its domicile. 



Through the artificial preservation for several weeks of 

 examples of Haliphysema Tumanowiczii in a living and 

 healthy state, some knowledge of its developmental history 

 has been arrived at. Attention was first attracted to the 

 presence in close proximity to the adult indivduals of minute 

 pedicellate and mostly pear-shaped organisms measuring only 

 from one sixth to one quarter of the height of the latter. 

 Examined closely, these were found to consist of yellowish 

 granular sarcode identical with that of the adult specimens, 

 from which, by a process of fission or gemmation, they 

 were evidently derived. In the smaller examples (PI. IV. 

 fig. 8) the surface of the periphery was entirely smooth, naked, 

 and unbroken ; but in rather larger ones (fig. 9 of the same 

 Plate, greatly amplified), slender, short, and slightly branching 

 pseudopodic processes were observed radiating on all sides, 

 representing the rudimentary condition of the attenuate anas- 

 tomosing pseudopodia of the adult types. Subsequently every 

 gradational step from this naked pyriform zooid to the test- 

 constructing and matured condition was observed, as also 

 an earlier and more rudimentary phase than either of those 

 just mentioned. This earlier phase will be found represented 

 in PI. IV. fig. 10, and may be compared to a free-moving 

 turgid Amceba, of yellowish colour and granular consistence, 

 which, after a brief nomadic state, settles down and develops 

 through the naked pedunculate forms into the characteristic 

 testaceous type. 



Ilali2)h7/sema Tximanoiciczii having now, it may be antici- 

 pated, found a permanent resting-place among the arenaceous, 

 and in this case adherent, test-building Foraminifera, repre- 

 sented by Dr. Carpenter's family of the Lituolida, it yet re- 

 mains to be decided whether the Haeckelian species H. pri- 

 mordiale^ echinoides^ and glohigerinaj as also the bilocular 

 expression of the same form, Gastrophysema dithalamium^ must 

 not be relegated to the same category. Mr. Norman {I. c. 



