When i encounter electron micrographs where there is such obvious order i just marvel at the detail and complexity of life. Here on the inner nuclear membrane of an alveolar type II cell, in between the nuclear pores, there are little RNP particles, neatly and tidily spaced at about 41 per 100nm, and at about 24nm diameter (slightly smaller than the ribosomes from this same micrograph used at a measure of 27nm diameter. These are organizationally (that is, the RNP and inner nuclear membrane, and the ribosomes on the RER membrane) and with such similar but not identical sizes, shapes and arrangements,  that it becomes almost silly not to see an evolutionary structural relationship.

Picture on top has NOT been altered, but the identical picture on the bottom has had the distinct areas of RNP burned using photoshop just to show you what i see. Red circles are ribosome size, relative to the enlargement of the images (taken at 27nm) and blue circles are RNP granules, which are apparently closer to 24nm diameter. Point here is the rigidity of the inner nuclear membrane, and flexing of the outer nuclear membrane at sites where the ribosomes on the outer nuclear membrane are actively producing protein.

Four adjscent inter-nuclear pore distances have been measured and RNP counted. Mean+/-SEM is given at 40.5 ribosomes/100nm  and all ribosomes together with all nm is 40.6. A tangential area of the inner nuclear membrane and many RNP forming a grid like network is seen about midway-top of both micrographs, but accentuated in the lower micrograph.