On the Gastropod Foot and Branchial Cavity. 513 



eye, sixth forming a suture with the parietal ; first lower 

 labial in contact with its fellow behind the symphysial ; two 

 pairs of chin-shields, subequal in size, the anterior in contact 

 with four lower labials. Scales in 15 rows. Ventralsl63; 

 anal entire; subcaudals 34. Dark olive-grey above, with a 

 yellowish nuchal collar; upper lip and lower parts yellowish, 

 posterior ventrals and subcaudals with small dark spots. 



Total length 270 mm.; tail 35. 



A single female specimen from the Mabira Forest, Chagwe, 

 W. of Ripon Falls, Uganda, presented by Dr. C. Christy. 



Viper a hindii. 



Snout rounded, with obtuse canthus ; eye moderate ; 

 rostral as deep as broad, divided into two by a transverse 

 suture; upper surface of head and temples with imbricate 

 strongly keeled scales ; no supraocular shield ; 10 scales in 

 a transverse series from eye to eye, 11 round the eye; 8 

 upper labials, third and fourth separated from the eye by one 

 series of scales ; three lower labials in contact with the chin- 

 shields. Scales in 25 rows, sharply keeled, outer row feebly 

 keeled. Ventrals 133; anal entire ; subcaudals 34. Brown 

 above, with two alternating series of darker, yellow-edged, 

 ocellar spots along the middle of the back and smaller dark 

 spots on the sides; a yellow line along the upper lip; lower 

 parts greyish olive, speckled with black. 



Total length 300 mm. ; tail 40. 



A single male specimen from Fort 'Hall, Kenya District, 

 4000 ft., presented by Mr. S. L. Hinde. 



LXX. — Notes on the Gastropod Foot and Branchial Cavity. 

 By Hilda M. Bishop, University College of Wales, 

 Aberystwyth. 



[Plates XII. & XIII.] 



1. Introductory. 



The main point of this work has been the correlation of the 

 structural features of the foot of various Gastropods with its 

 observed functional activities. 



For this purpose the following types have been studied : — 



1. Haliotis tuberculata, alive and in section. 



2. Patella vxdgata, alive and in section. 

 Ann. & Mag. N. Hist. Ser. 8. Vol. v. 35 



