JOURNAL OF MICROSCOPICAL SCIENCE. 
EXPLANATION OF PLATES XV & XVI, 
Illustrating Mr. J. D. SiddalPs Memoir on Shepheardella, 
an undescribed Type of Marine Rhizopoda ; with a 
few Observations on Lieberkuhnia.^^ 
PLATE XV, 
Illustrating Shepheardella tceniformis life-history. 
Fig. 1 . — Three specimens drawn natural size. 
Fig. 2. — A living Shepheardella^ with pseudopodia extended from the two 
end apertures, and also from the investing layer of sarcode. Oval nucleus 
near the middle. X 15 diameters. 
Fig. 3 a. h. — The middle and two ends of same specimen, showing 
nucleus, apertures, integument, and yellowish granular sarcode. x 170 
diams. 
Fig. 4. — The varying appearances presented by the nucleus as it is 
carried along by the rotating protoplasm {sarcode). X 120 diams. 
Fig. 5. — A very small and somewhat abnormal specimen. X 60 diams, 
a. and b. The end showing aperture and first protrusion of pseudopodia. 
Fig. 6. — A many-apertured form, probably ‘‘ Shepheardella ^ in first stage 
of “ breaking up.” Pseudopodia drawn to actual length. X 27 diams. 
Fig. 7. — Fig. 2 at nine a.m., December 18th. a. Detached portion of 
sarcode. 
Fig. 8 a. b. — Fig. 2 at seven p.m., December 19th. Viewed from both 
sides of the cell. 
Fig. 9 a. b. — Fig. 2 at nine a.m., December 20th. Viewed from both 
sides of the cell. Sarcode all naked^ having beeu exuded from the 
wrinkled empty integument i. 
Fig. 10 a. b. c. d. — The naked sarcode of another Shepheardella,^* which, 
having passed through preliminary alterations in form, somewhat similar to 
those represented by Figs. 2, 7, 8, 'and 9, broke up into four separate portions 
on December 17th at nine a.m., twenty-four hours previously having been 
just as Fig. 9 in form, but still enclosed in its integument. 
Fig. 11. — Fig. 10 at 10.30 p.m.,, December 17th. 
Fig. 12. — Fig. 10 at nine a.m., December 18th. a. b. Detached amoeboid 
portions. Figs. 7 to 12 X 20 diameters. 
Fig. 13 a. b. c. — Fig. 10 on December 27th. Breaking up. a. The 
empty integument, b. A protruded mass of still sarcode, containing a 
number of nucleated granules, c. One of the latter which has developed 
Actinophrys-like rays. 
Fig. 14 a. b. — Actinophrys-form some days after liberation. x 250 
diams. a. Dividing into three separate individuals, b. Large example, 
containing nucleus and contractile vesicle. 
Fig. 15. — A minute portion of Fig. 12, detached on December 18th, 
containing a large number of granules exceedingly small, yet much larger 
and more definite in form than the ordinary granules of the sarcode. 
