MOLLTJSCA OF INDIA. 121 



which I follow until an anatomical comparison shall be made with 

 R. ovum the type of the genus by Albers." 



It will be seen on comparing Prof. Samper's figure of the generative 

 organs of R. ovum (Reis. in Arch. Philipp. p. 69, pi. iv. fig. 1, 1870) 

 that they have no similarity to those of the Andaman shell. The 

 genitalia of R. ovum are of the most simple form, especially as 

 regards the male organ. 



Description in Mon. Helic. Vivent. : — " Testa umhilicata, conoidea, 

 solida, striis incrementi irregidarihus et confertissimis spircdibus 

 decussatula, sericea, fidvida, spira conoidea, obtusa ; sutura pallide 

 marginata ; anfr. vix 5, convexiusculi, sensim accrescentes, ultimus 

 peripheria angulatus, ad suturam turgidtdus, basi convexus, juxta 

 umbilicum angustum compressus ; apertura pcrobliqua, subtetragono- 

 lunaris ; perist. obtusum, margine supero recto, basali incrassato, 

 rejiexiusGulo, columellari declivi, subdentato, superne triangulatim 

 reflexo. 



"Diam. maj. 34|, min. 30, alt. 20 mill. (Mus. Cuming). 



" Habitat ?'" 



Stoliczka made the following note in pencil on the drawing * .- — 



" ? haughtoiii. Andamans. 



" Animal dark brown, reddish at the pedicles. Mantle thick, 

 greyish brown, freckled with white : body very rough, looks like 

 shielded (? chiselled) ; pedal row very distinct and the elongated 

 tubercles whitish, basal edge pale greyish brown. Tail-gland 

 distinct, surrounded by a swollen edge." 



Original description (Helix haughtoni, Benson) : — " Testa per- 

 forata, subumbilicata, solidula, subtrochiformi, irregulariter oblique 

 obsolete plicatula, confertissime et minutissime spiraliter striata, 

 epidermide rubenti-olivacea ; spira depresse conoidea, apice valde 

 obtuso, sutura impressa ; anfr. 4g-5, convexis, idtimo antice breviter 

 vix descendente, ad iJeripheriam angidato, subtus convexo, circa 

 wmhilicuni intus callo arctatum compressiuscido ; apertura obliqua, 

 suhrofundato-lunata, suhquadrangulari, intus albida, peristomate 

 recto, marginibus callo tenuissimo javctis, dextro intus subincrassato, 

 columellari superne breviter reflexiusculo, subtus incrassato, intus 

 dente calloso interdmn munito. 



" Diam. maj. 31, min. 27, axis 19 miU. 



" Habitat in insulis Andamanicis. 



" Detexit Major J. C. Haughton. 



" This is the largest Helix, and the most peculiar in form and in 

 the formation of the aperture, yet received from these islands, 

 the columellar callus in one specimen recalling- the appearance 

 observable in some Mauritian Helices. In a second specimen, this 

 protuberance is more slightly developed, I am indebted for it to 

 Major Haughton, late Superintendent of the Andaman Colony, now 

 Chief [?] [Deputy in 1863J Commissioner in Assam, whose search 



* Fig. 38 (uncoloured) of MSS. Drawings in Library, Indian Museum, 

 Calcutta. 



m2 



