On the structure of the orang outang / by Henry C. Chapman.

  • Henry Cadwalader Chapman
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: On the structure of the orang outang / by Henry C. Chapman. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    short one, tlie latter dividing’ into left carotid and snhelavian. The arteries and veins of the extremities did not differ from those of the Gorilla and Chimpanzee. 1 found in the Orang, as in them, the ‘■‘long sa})henous artery ” accompanying the nerve and vein of same name. The mesenteric vessels exhibited loops along the borders of intestine. Genito-urinani Apparatui>.—'fhe general appearance of these structures resembled strikingly those of man (PI. lo). The kidney measured inches in length, and exhibits only one papilla. The ureters were 5 inches long. The bladder was 2 inches in length and 1 in diameter. The testicles measured jj of an inch in length, and were situated near the inguinal canal, ddie cavit}^ of the tunica vaginalis testes was shut oif from the general peritoneal cavity. The vas deferens was 4 inches in length, the seminal vesicle 1 inch ; the seminal duct was very short. The caput gallinaginis was well developed, as was also the ])rostate. The penis measured 2 inches in length, the glans was of cylindri- cal shape. There was no bone in the |)cnis. The Cow})er’s glands were relativel}^ large. Nervous System—The brain of the Orang has been figured by Tiedemann, Sandifort, Schroeder van der Koik and Yrolik, Gra- tiolet,Rolleston,etc. On account, however, of the few illustrations extant, and of the importance of the subject, I avail myself of the opportunity of presenting several views of my Orang’s brain (Pi’s 16 and 11), which was removed from the skull only a few hours after death. The membranes were in a high state of congestion, and a little of the surface of the left hemisphere had licen disorganized by disease, otherwise the brain was in good condition. It weighed exactlv 10 ounces. The brain of the Orang in its general contour resembled that of man more than those of either of the Chim])an- zees which I examined. In these the brain was more elongated. The general character of the folds and fissures in the brain of the Orang, Chimpanzee, and man are the same, there are certain minor differences, however, in their disposition in all three. The fissure of Silvius in the Orang runs u}) and down the posterior branch pursuing only a siightl}^ backward direction, the anterior branch is small. The fissure of Rolando, or central fissure, quite apparent, is, however, situated slightl}'^ more forward in the Orang than in man. It difterentiates the frontal from the parietal lobe. The parieto occipital fissure is well marked, bordered externally
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