570 Lt.-Culonel II. H. Grjd win- Austen oti 



me two specimens o£ Euonyma lanceolata, Pfr., which show 

 this even far more distinctly than in the specimens of 

 P. hudsonice referred to by nie. 



Species of the Genus KerkophOEUS. 

 The most striking feature in the animal of this genus is 

 the great elongation of the lobe above the mucous pore, 

 forming quite a tail-like extension of the extremity of the 

 foot. Major C'onnolly has given me a copy of his orignial 

 description made from the first example he saw alive of 

 Microkerhus symmetricus, Craven, which will be described 

 in the next portion of this paper. This field-note is of 

 considerable interest and I quote it in extenso-. — 



'• Tail as long as fore part of body, indented for \ inch 

 from the tip with a peculiar ck-ft or fissure, from the up])er 

 end of which grows a small, black, fleshy horn, ichich can he 

 w'ltlidraion or slightly protruded at ivill.'^ (The italics are 

 mine.) 



Now in this species the lobe or horn is far smaller than in 

 K. inunctus and the species described below, and yet it was 

 observed to be retractile ; how much more apparent this 

 power of enlargement by the animal and its sensibility would 

 be in the latter species, where the horn has reached its 

 maximum development. 



In the Indian genera of the Zonitidje, such as Ariophanta, 

 Alacrochlamysy Austenia, Qirasia, &c., the lobe, although 

 showing considerable diversity in shape and dimensions, 

 would not be described as decidedly retractile ; ils size and 

 form is more dependent on atmospheric conditions. 



This leads me to refer to a ])aper which was published in 

 the * Proceedings of the Malacological Society,' vol. i. pt. 6, 

 July 1895, on Martensia viozamhicensis, Pl'r. The species 

 liad been recently collected by Dr. J. VV. Gregory when on 

 his interesting expedition in Eastern Africa during 189i). 

 I was indebted to Mr. Edgar i\. Smith for the two speci- 

 mens I dissected and described. 



This African land-shell has also a peculiarly long horn 

 above the mucous pore, vide I. c. pi. xix. figs. !&!(/, 

 drawn from a spirit-specimen and therefore very much 

 contracted to what it must be in the living state ; muscular 

 rings on the horn point to its extensibility. The shell of 

 Martensia tnozanihicensis, Pfr., difl^'ors in every way from the 

 globose, few-whorled, and comparatively thin shells of 

 Peltatus and allied genera, being solid or more helicoid in 

 form. Several species are recorded by Prof. E. vou Martens 

 in the Monatsb. der konig. preiis. Akad. Wiss. Berlin, 



