MOLLUSCA OF INDIA. 187 



The radula, which was extracted quite perfect, has the formula 



48 . 1 10 . 1 . 10 . 1 . 48 

 59 . 1 . 59 



81 rows of teeth. 



The centre tricuspid, the median with a cusp on the outer side ; 

 the laterals bicuspid, with points even ; about five of the smallest 

 outermost laterals are tricuspid. 



When the animal is withdrawn into the shell the heart is seen 

 situated at the distance of one whorl from the aperture, on the 

 front lower portion of the last whorl. 



In the genitalia (fig. 1) the male organ is a modified form of that 

 of Eupleeta binot/aensis (Plate XCVII.), only that the loop is not 

 present, while the muscular caecum is longer ; in the second speci- 

 men dissected, and from which the figures are taken, the spermato- 

 phore in process of development (fig. 1 a) is of the same type. The 

 amatorial organ is present. 



Subgenus Eavana, Godwin-Austen. 



In Part IV. (October 1883) of this work I figured a Ceylon 

 shell, Plate XXVI. fig. 6, as MacrocMamys't poUtissimn, Pfeiffer. 

 In 1901 I received from Mr. 0. Collett a specimen in spirit of this 

 species collected at Watawala, 3500 feet. The shells agree in size 

 and form. In May 1901 I made a dissection of the animal, and 

 published the results in the ' Proceedings of the Malacological 

 tSociety of London,' read on 14th June, 1901, appearing in vol, iv, 

 pt. 6, p. 261, pi. xxvi. figs. 1-6. It was found to have no sort of 

 relationship to Macroclilamys, but to be close to Ariojyhanta , yet so 

 distinct from the type species, A. Icevipes, that I created the sub- 

 genus Havana for its reception. 



Family ENDODONTIDiE. 



At the end of Part IX., pp. 139, 140, I alluded to the genus 

 Philalanl-a, and stated that Thiisanota crinigera, Bs., T. biciliata, 

 Pfr., and T. hispida, Sykes, are closely allied to this genus. I am 

 now able to give full details of the study of these species. 



Among those who have done excellent work collecting and pre- 

 serving the animals of the Ceylon land-mollusca I must especially 

 mention Mr. Oliver Collett, of the Binoya Estate, Watawala, whose 

 early death in 1902 we have to deplore ; his knowledge of the 

 molluscan fauna of the island was very considerable. The specimens 



