12 ENDODONTID^E. 



19. Thysanota flavida, Gude. 



Thysanotajtavida, Gude, Proc. Malac. Soc. London, xi, 1914, p. 52, 

 text-figure. 



Original description : " Shell narrowly umbilicate, depressed 

 trochiform, finely plicate-striate, pale yellowish-corneous. Spire 

 subconvex, suture impressed, apex obtuse. Whorls 6|, increasing 

 slowly and regularly, convex above and below, carinated, the cariiia 

 exserted, except in the protoconch, with a raised spiral thread a 

 short distance above the carina and densely crowded with im- 

 pressed spiral lines, more distinct on the under than on the upper 

 side ; the carina and spiral thread fringed with deciduous coarse 

 cuticular processes, resembling flattened hairs. Aperture oblique, 

 securiform ; peristome acute, the outer margin subconvex, basal 

 arcuate, columellar almost vertical, slightly dilated. 



" Major diam. 12, minor 11-5 mm.; alt. 7 mm." 



Hab. India : Nilgiries (Beddome}. 



A specimen received from the late Col. Beddome as T. crinigera, 



Fig. 1. Thysanota flavida. (From Proc. Malac. Soc. London.) 



proved upon examination to differ from that species in being more 

 convex and more elevated in the spire, in the whorls being more 

 convex, and in the narrow umbilicus ; the keel is also more ex- 

 serted, while the plicate transverse striae are much less pronounced, 

 those in crinigera being almost lamellate. Mr. Ponsonby possesses 

 two immature specimens which I also refer to the new species. 

 They were likewise received from Col. Beddome as criniyera and, 

 although labelled only South India, are probably from the same 

 locality. 



20. Thysanota crinigera, Benson. 



Helix criniyera, Benson, A. M. N. H. ser. 2, v, 1850, p. 214 ; Reeve, 

 Conch. Icon, vii, 1852, pi. 125, fig. 746; Hauley & Theobald, 

 Conch. Ind. 1870, pi. 60, fig. 7. 



Thysanota crinigera, God win- Austen, Moll. India, ii ; 1907, p. 189, 

 pi. 112, fig. 2 (anatomy). 



Original description : " T. anguste umbilicata, depresso-trochi- 

 formis, cornea, radiato-costulata ; apex obtusiusculus ; anfr. 6-6| 

 vix convexiusculi, linea unica elevata supersuturali minuti, ultimus 

 carinatus ; carina suturaque pilis elongatis ciliatis ; basis plani- 

 uscula, ad umbilicum compressiuscula, lineis impressis concentricis 

 frequentibus ornata ; apertura obliqua, angulato-lunaris, securi- 

 formis ; perist. simplex, acutum. 



" Diam. maj. ]2|, min. 12, alt. 6| mill." 



