Microglia
The ability to view and characterize different neural cells including microglia began in 1880 when Nissl staining was developed by Franz Nissl. Franz Nissl and F. Robertson first described microglial cells during their histology experiments. The cell staining techniques in the 1880s showed that microglia are related to macrophages. The activation of microglia and formation of ramified microglial clusters was first noted by Victor Babeş while studying a rabies case in 1897. Babeş noted the cells were found in a variety of viral brain infections but did not know what the clusters of microglia he saw were. Pío del Río Hortega, a student of Santiago Ramón y Cajal, first called the cells "microglia" around 1920. He went on to characterize microglial response to brain lesions in 1927 and note the "fountains of microglia" present in the corpus callosum and other perinatal white matter areas in 1932. After many years of research Rio-Hortega became generally considered as the "Father of Microglia." For a long period of time little improvement was made in our knowledge of microglia. Then, in 1988, Hickey and Kimura showed that perivascular microglial cells are bone-marrow derived, and express high levels of MHC class II proteins used for antigen presentation. This confirmed Pio Del Rio-Hortega's postulate that microglial cells functioned similarly to macrophages by performing phagocytosis and antigen presentation.
Microgaza rotella
Microgaza rotella is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.The depressed shell is small and grows to a length of 6.8 mm. It has five whorls, somewhat flattened above and below. The nucleus is small, translucent white, and with the two first whorls polished. The nucleus is smooth or marked only by faint growth lines. The remainder of the whorls show a narrow puckered band revolving immediately below the suture, on which the shell matter is as it were pinched up into slight elevations at regular intervals, about half a millimeter apart. In some specimens, outside of this band an impressed line revolves with the shell. The remainder is smooth, shining or with evanescent traces of revolving lines impressed from within and strongest about the rounded periphery. The base of the shell is rounded toward the umbilical
carina over which it seems to be drawn into flexuously radiating well-marked plications (about thirty-two on the last turn). These plications disappear a third of the way toward the periphery. The wall of the umbilicus is concave, overhung by the carina. The turns of the shell are so coiled that the part of each whorl uncovered by its successor forms a narrow spiral plane ascending to the apex like a spiral staircase or screw thread. The thin columella is straight and lacks a callus. The aperture is rounded except at the angle of the umbilical carina. The margin is thin, sharp, not reflected or thickened. There is no callus on the body whorl in the aperture. 
The shell is whitish or greenish. The nacre is less brilliant in dead or deep-water specimens. The shell shows zigzag brown lines variously transversely disposed and disappearing on the base.