TRANSACTIONS OF SECTION D. 



645 



Anteeioe Limb. 



Levator anguli scapulse , 



Serratus magnus 



Supra-spinatus . 

 Infra-spinatus . 



Posterior. 



Iliopsoas. 



(Abductors and external rotators at- 

 l tached to the tuberosity. 



Internal vastus. 



External vastus. 



Arteries. 



Ulnar 



Eadial (superficial volar) 



Continuation of radial 



Brachial 



Axillary 



External plantar. 



Internal plantar. 



Anterior tibial (peroneus). 



Posterior tibial. 



Sciatic (femoral at back of thigh). 



Brachial plexus 

 Cervical plexus 



Nerves. 



. . Sciatic. 

 . Lumbar. 



Cutaneous Supply, 



Cervical supplies skin over shoulder 



Brachial — Arm, forearm, hand . 

 Spinal — The skin over latissimus 



I Lumbar plexus supplies skin over 

 I thigh and inner part of tibia. 



Sacral — leg and foot. 



The skin over Gluteus. 



Gluteus maximus 



Biceps . 



Sacral. 



Muscles. 



■ Latissimus . 



• Subscapularis 



Teres major . 



Brachial. 



Botanical Department. 



1. On the State of the Water ia Living Protoplasm. 

 By Professor M. M. Hartog, Ph.D. 



2. On Epinasty and Hyponasty.^ By Professor S. H. Vines, F.B.S. 



The object of the observations described in this paper is twofold : first, to 

 ascertain whether the epinasty and byponasty exhibited by dorsiventral members 

 are spontaneous or induced, with special reference to Detmer's conclusion (' Bot. 

 Zeitung.' 1882) that epinasty is induced by light; and, secondly, to ascertain 

 whether the change from the horizontal to the erect position, which is exhibited 

 by many dorsiventral members on being kept for some time in darkness, is due to 

 inherent causes, or to the action of gravity inducing negatively geotropic curvature, 

 as urged by Frank (' Die natiirliche wagerechte Richtung von Pflanzentheilen,' 

 1870) and others. 



With regard to the first point, Detmer's conclusion is based upon the obser- 

 vation that the cotyledons of Cucurbita, when the seedling is kept in darkness, do 

 not separate, but remain erect, with their upper surfaces in contact, and that, 

 under similar cu-cumstances, the primordial leaves of P/iaseolus do not become 

 fully expanded. The author points out that the cotyledons of Cucurbita are, as a 

 matter of fact, found to separate in darkness if the observations are continued for 

 a sufficiently long time, but agrees with Detmer that the leaves of Phaseolus do 

 not become fully expanded under these conditions. The explanation of these facts 

 suggested by the author, in opposition to Detmer, is that light does not induce 

 «pinasty, but that it simply induces the phototonic condition which promotes the 



' Published In full in Annals of Botany, vol. iii., 1889. 



