1862.] 



MR. W. H. FLOWER ON THE JAVAN LORIS. 



103 



Figs. 13-17. Reptilia. 



L. D. S. D. 

 Gymnopodus aegyptia- 



cus 1,143 2,000 



Crocodilus acutus 1,231 2,286 



T. 8,000 



Lacerta viridis 1,555 2,743 



Anguis fragilis 1,178 2,666 



Coluber berus 1,274 1,800 



Nucleus 3,227 4,986 



Python tigris 1,440 2,400 



Nucleus 3,555 7,468 



Bufo vulgaris 1,043 2,000 



T 5,625 



Nucleus 2,802 5,261 



Lissotriton punctatus .. 814 1,246 



Nucleus 1,778 2,667 



Fig. 14. Sieboldia maxima 450 800 



Fig. 15. Siren lacertina. 420 760 



Nucleus 1,142 2,007 



L. D. S.D. 



Fig. 1 6. Proteus anguinus 400 727 

 Fig. 17. Lepidosiren an- 



nectens 570 941 



Nucleus 1,455 2,900 



Figs. 18. Pisces. 



Perca cernua 2,461 3,000 



The same on edge, T. 8830 



Nucleus 6,000 8,000 



Cyprinus tinea 2,286 2,722 



T 8,830 



Nucleus 8,500 9,600 



Esoxlucius 2,000 3,555 



Nucleus 5,333 8,000 



Thymallus vulgaris ...1,684 2,900 



Gymnotus electricus ... 1,745 2,599 



Squalus acauthias 1,143 1,684 



Ammocoetes branchialis 2,460 



March 11, 1862. 

 Dr. Gray, V.P., in the Chair. 



Mr. W. H. Flower, F.R.C.S., F.L.S., Conservator of the Museum 

 of the Royal College of Surgeons, read a memoir on the Brain of 

 the Javan Loris (Stenops jav aniens) . 



The subject of this communication was an adult female, which died 

 in the Zoological Society's Gardens in January, 1862. In the exa- 

 mination of the brain every care had been taken to preserve the natural 

 configuration of the different portions of the organ ; the drawing of 

 the upper surface had been made before its removal from the cranial 

 cavity, and the other dravringSj descriptions, and measurements were 

 checked by comparison with a cast of the interior of the skull. The 

 value of the descriptions and figures of the brain of Stenops already 

 published had been much diminished by inattention to such precau- 

 tions ; and they had also had the disadvantage of being made before 

 the researches of Gratiolet had thrown light upon the arrangement 

 of the convolutions on the cerebral hemispheres of the higher Qua- 

 drumana. A new description, which may serve as a standard of 

 comparison in studying the cerebral anatomy of allied forms, seemed 

 therefore to be called for. 



The following is an abstract of Mr. Flower's remarks : — 



" When seen in situ, the two hemispheres present together an oval 

 figure, 1*3 inch in length, and r05 inch across the broadest part, 

 which is situated at the junction of the middle and posterior third of 

 the long axis. From this point the oval gradually narrows to rather 

 a sharp apex in front. There is no appearance of that want of 

 symmetry, both of size and form in the two hemispheres, described 

 and figured by Vrolik. Projecting anteriorly to the extent of ^ inch 

 ]t)eyond the cerebral hemispheres are the olfactory lobes, of consider- 



