The occipital bone in Primates. 



79 



Semnopithecus obscurus (juv.)- A. -P. 3.8. T. 4.2. Superoccip. 2.4 cm. The 

 upper edge of temporal, upper end of malar and upper edge of occipital 

 (at side) are on the same level. The occipital is 2.4x0.6 cms. F. 1.2. The 

 basioccipital and superoccipital contribute equally to this; the exoccipitals 

 form each a larger part of the rim than these. B. 1. F. 1.2. F. to Sum- 

 mit 2.6 cms. 



Semnopithecus leucoprymnus. B. 1.0 cm. F. 1.3. F. to Apex. 3.2. In this and 

 the last specimen, the posterior parts of the Condyles are much larger than 

 the anterior. 



Semnopithecus sp. (India). B. 1.8. F. 1.9 round. Tabular part flat, shortest 

 length = to breadth. 



Semnopithecus sp. A.-P. 4.3. T. 4.0. B. 1.1. F. 1.4. T. 0.7. F. to Apex 2.8. 

 Condyles approach in front dist. 0.7 behind 1.4 cm. Tabular part hollowed 

 below superior curved lines. Foramen Magnum is nearly square. 



Hylobates agilis. A.-P. 4.5. T. 4.8. B. 0.9. F. 1.9. T. 1.5. F. to Apex 2.9. 

 Condyles Fr. 1.0.^ Beh. 1.6 cm. Each Cond. 1.0 cm long, 0.7 broad. Con- 

 dyles subside anteriorly and are continued by elevated tracts on each side 

 into a triangular elevation which has its base at the foramen, its apex is 

 near the basilar part. The posterior Condyloid fossae are deep. A wide 

 elevation exists above the foramen magnum, at the summit of this are two 

 pits one on each side, a line runs 

 from summit of each to the Con- 

 dyloid process on each side: There 

 is on the cranial surface a median 

 fossa and one on each side below 

 the curved lines. The higher super 

 occipital part is somewhat flattish 

 in the middle, but more rounded 

 and thinner at the sides. 



Hylobates Leuciscus. Antero-posterior 5.1. 

 Trans. 5.2 cm. Bas. 1.1. F. 2.0 >c 

 1.5 cm. For. to Apex 3.8 cms. Four 

 convex surfaces two on each side of 

 the median line (externally) repre- 

 sent four Cranial fossae . . . The 

 median elevation is narrow and low. 

 Condy. Dist. 1.7 F and 1.5 beh. 

 Cond. L. 1.1 X Br. 0.4 cm. 



Hylobates Leuciscus (2). A.-P. 4.7. T. 4.9. B. 1.2. F. 1.6. For. to Apex 4.3 cm. 

 Dist. Fr. 1.1 beh. 1.4. Angle between plane of occipital foramen and 

 palatine plane nearly = 188". 



Hylobates sp. A.-P. 4.8. T. 4.8. B. 1.7. F. 1.7. F. to Apex 3.5. Condyl. Fr. 

 0.7 beh. 1.5. Owen mentions that the frontal in the Skull of one Hylobates 

 reached almost to the occipital. 



Bas. 1.1. Fr. 1.2. F. to Apex 2.4. Con- 



Fit;. 11. 



Hylobates Mülleri. A.-P. 5 cm 

 dyl. D. 0.5 beh. 1.5. 



Hylobates Hainanus <J. A -P. 5. 

 F. M. broad 1.4. Dist. Fr. 



T. 5. 



T. 



07. 



5.4. B. 1.3. F. 1.75. F. to Apex 3.4. 

 Beh. 1.6. The condyles are each divided 



into an anterior and a posterior part. The angle between the plane of the 



