376 



a period of six years, accompanied by drawings of the more remark- 

 able objects. 



The principal results seem to be a large addition to the list of ne- 

 bulae with curved or spiral branches, and many new double and 

 multiple nebulae. A variety of objects have been also pointed out 

 upon which the labour of a careful scrutiny will probably be amply 

 repaid, with a similar instrument, even in this climate. A still larger 

 number have been marked off, which to save time may be passed 

 by, unless some new views on Cosmogony should suggest sufficient 

 motives for reobserving them. A record has-been made, which, to 

 some extent, will be available hereafter for comparison with the 

 heavens, and a few cases of suspected change have been noticed, 

 where the evidence, however, is by no means conclusive. 



XVIII. " Observations on the Posterior Lobes of the Cerebrum 

 of the Quadrumana, with a Description of the Brain of a 

 Galago." By WILLIAM H. FLOWER, Esq., Demonstrator 

 of Anatomy at the Middlesex Hospital. Communicated by 

 Dr. SHARPEY, Sec. R.S. Received June 20, 1861. 



(Abstract.) 



After referring to the present state of our knowledge upon the 

 subject, and especially to the descriptions recently given of the 

 " posterior cornu of the lateral ventricle " and " hippocampus 

 minor" in the Orang-Utang by Dr. Rolleston, in the Chimpanzee 

 by Mr. Marshall, and in Ateles by Mr. Huxley, and the statements 

 of M. Gratiolet, that the posterior cornu of the lateral ventricle or 

 " cavite ancyro'ide" obtains an enormous development in Monkeys, 

 the author proceeds to detail his own observations (which are illus- 

 trated by drawings and photographic representations) upon the con- 

 dition of these parts in the brains of animals belonging to the three 

 families of the order Quadrumana. 



Family 1. CATARRHINA. 



Orang-Utang (Pithecus satyrus). An account is given of the 

 examination of the brain of a young female of this species, preserved 

 in the Middlesex Hospital Museum. The posterior lobes of the 

 cerebral hemispheres were so far developed that they completely 

 covered the cerebellum, although not prolonged backwards to quite 



