. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 180 PELVIS. was only 4 feet high, and had never walked nor menstruated, the sacrum and innominate bones were connected by cartilage only, but the ischio-pubic rami were united. It pre- sented, in size as well as form, the charac- teristics of that of a child of six or seven years old. The conjugate diameter was larger than the transverse, the ilio-pectineal line little curved, and the cavity funnel-shaped, the sub-pubic angle being only 3(H°. The bones were not rickety. The organs of generation, both internal and externa
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 180 PELVIS. was only 4 feet high, and had never walked nor menstruated, the sacrum and innominate bones were connected by cartilage only, but the ischio-pubic rami were united. It pre- sented, in size as well as form, the charac- teristics of that of a child of six or seven years old. The conjugate diameter was larger than the transverse, the ilio-pectineal line little curved, and the cavity funnel-shaped, the sub-pubic angle being only 3(H°. The bones were not rickety. The organs of generation, both internal and external, were infantile. The measurements and appearance of this pelvis are contrasted by that author with those of the dwarf previously described. The arrest of development seems to have taken place in the present case at a period long before the changes of puberty, as shown by the undeveloped genital organs; so that the cases differ only in the degree of immaturity. Such cases as the latter are not likely to require the aid of the accoucheur. In accouchements at a premature age, how- ever, some of the yet-remaining peculiarities of the infantile pelvis may present difficulties in parturition, among which the contraction of the diameters, if not their want of adult propor- tions, will be the chief. At the period of puberty, the transverse and oblique diameters enlarge much more rapidly, in the female, than the antero-posterior,, and begin to preponderate overtliem, while, at the same time, and in a great measure in consequence, the pelvis begins to assume its adult " standard " appearances. The full development of size, however, is somewhat later in being accomplished, and depends upon the completion of the ossifi- cation. These changes of the pelvis take place, as explained by Mr. Shaw *, somewhat later than those of the upper parts of the body, in the transition from the infant to the adult state, but proceed to a greater extent, so as to reverse the excess in proporti
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