510 Proceedings of the Association of American Anatomists 



The deformity has been observed in several members of the same fam- 

 ily and in two generations. The functions of the shoulder and arm have 

 been found but slightly disturbed ; the presence of the muscle marks on 

 the bones in this specimen indicates at least a normal development of 

 the muscles in this region. 



Individuals affected with this deformity are apt to be of small stature, 

 scoliotic, with eyes far apart, the bridge of the nose flat, and the teeth 

 irregularly formed. The malformation is seen in both sexes. 



Hultkrantz, J. Wilb., Anat. Anz., Bd. 15, No. 13, p. 237. Carpenter, Geo., 

 Lancet, N. 3932, Jan. 7, 1899. 



ON CEETAIN ANOMALIES OF BONES. By George Amos Dorset. 

 Eead by title, 



A SKULL SHOWING AN UNUSUAL NUMBER OF WORMIAN BONES 

 ASSOCIATED WITH IMPERFECT SKELETAL DEVELOPMENT. By 

 Charles A. Parker. 



The skull is that of a fairly intelligent man, age 45, a former resi- 

 dent of this city (Chicago), whose spine presented a marked forward 

 dorso-lumbar curvature and the imperfectly developed limbs Avere 

 curved and misshapen. A progressive recession of the face due to in- 

 complete dentition and a slight circumferential constriction of the 

 cranium with compensating vertical elevation are the only noteworthy 

 mensural variations. The capacity is normal. The noteworthy feature 

 is the extraordinary development and distribution of the Wormian 

 bones, these numbering 172. The whole membranous portion of the 

 cranium behind the coronal suture is composed of these bones. A few 

 in the orbital plates and one measuring 5x9 cm. occupying the upper 

 part of the right half of the frontal bone are found in front of this 

 suture. The chondro-cranium contains none. They are most numer- 

 ous and delicate in the squamo-parietal region, where their slender 

 interlacing processes completely obliterate the usual sutures. They are 

 larger posteriorly and largest in the anterior portion of the parietals 

 whose frontal angles are formed by two symmetrical quadrilateral bones 

 measuring 4x8 cm. The sagittal suture is distinct throughout and 

 extends from the nasion to the ehondro-skeleton of the sqtiamo-occipi- 

 talis. 



Note. — This specimen is from the Pathological Laboratory of Rush 

 Medical College, and a more extensive description of the skeletal changes 

 will be published later by Prof. L. Hektoen and the writer. 



