British and German Kast Africa, d:c. f)?A 



imprcs'pd, faintly marf^'ined l»olo\v ; pprforation very small ; 

 colunu'llu slii^litly curved and rcHexed ; labium simple, 

 arcuate ; aperture sul)lunate. 



Alt. 3*5, diain. maj. 7, diam. niin. C mm. 



Ai'erture : alt. 3, diam. 3*75 mm. 



Jlab. Sliimbi lliU.s, British East Africa. 



Tfiapsia insulsa, sp. n. (Fig. 14.) 



Shell differing from 7'. exnsperatn in its much smaller size 

 and mure compact coiling, though having the same number of 

 wlioii-*, rather less depressed spire, and proportionately wider 

 perforation, which in the present species, notwithstanding its 

 much smaller dimensions, is of about the same diameter as 

 T. exasferata. 



Alt. To, diam. maj. 3 2.5, diam. min. 275 mm. 



llab. Shiuibi Hills, British East Africa. 



Phortion ariel, sp. n. (Fig. 15.) 



Shell small, globosely turbinate, thin, horny, pale brown ; 

 whorls 5, rather fiat, sculptured with very fine and closely 

 set, silky, transverse and minute, spiral stri«; sutures im- 

 pressed ; base of shell inflated; columella reflexed, vertically 

 descending and forming an obtuse angle with the labium 

 which is acute and arcuate ; aperture sublunate. 



Alt. 4, diam. maj. 3'5 mm. 



Aperture : alt. 1"75, diam. 1"5 mm. 



Jial>. Shimbi Hills, British East Afiica. 



The name Phasis being preoccupied in another branch of 

 Zoology it becomes necessary to substitute a new name for 

 the moUuscan genus until now bearing this apj)ellation, of 

 which the type species is P. menhana, Ptr., from the Cape 

 of Good Hope J I therefore propose the name Phortion, for 

 this group. 



Rachis hieroglyphictis^ sp. n. (Fig. 16.) 



Shell turbinately ovate, extreme apex black, the remainder 

 of the shell whiti.sh, painted on the upper whorls with two 

 spiral rows of squari.<h, dark chestnut blotche.<', between which 

 occurs a narrow, indistinct, interrupted band of a paler colour, 

 the last whorl ornamented with numerous narrow bands of 

 chestnut and black, the upper of these being much interrupted, 

 the lower ones less so until the last which is continuous, the 

 spaces between the last three being occupied with black 

 transverse flame- markings and streaks which, together with 

 the spiral band.-, present the appearance of hieroglyphics^ 



