36 LAND AND FRESHWATER 
The specimen figured is No, 66 of Mr. Blanford’s collection and 
MS. list, a typical specimen from Benson, from the original locality. 
This measures—Major diam. 8:0, alt. axis 4°8 mm. 
There are two other specimens in the same collection (No. 67) 
marked palmaria, var., from the Wynaad, collected by Colonel 
Beddome ; these are much smaller, but in other respects similar, 
being only 5:0 mm. in major diameter. 
Srrata arx, Benson. (Plate IX. fig. 8.) 
Helix arx, Benson, Ann. & Mag. N. H. 1859, iii. p. 184; Pfr. 
Mon. Hel. v. p. 90; Conch, Ind. p. 25, pl. liv. fig. 8. 
Sitala arx, Theob. Suppl. Cat. p. 20 (Therapon Hill, Tenasserim 
valley). 
Nanina (Sitala) arw, Nev. Hand-list, p. 34. 
Original description :—‘ Testa anguste perforata, acute conica, 
tenut, striis minutissinus confertissimis obliquis, lirisque 38-4 spirali- 
bus, validis, superne sculpta, subtus leviori, translucente, olivaceo- 
cornea; spira gracili, conca, lateribus concavis, sutura marginata, 
apice acutiusculo, hyalino; anfractibus 73, superioribus conveaius- 
culis, tum planiusculis, ultimo acute carinato, subtus convexiusculo ; 
apertura obliqua, trapeziformi, peristomate recto, acuto, margine colu- 
mellari breviter reflexo, superne perforationem subtegente. 
“Diam, major 10, minor 9, axis 74 mill. 
“¢ Hab. ad collem Therabuin, vallis Tenasserim, nec raro; detexit 
W. Theobald,” 
‘«‘ Distinguished by its sculpture and slender concave spire, which 
recalls that of my Nilgherry species, H. cacuminifera.” 
This last-named shell, however, is very distinct in its sculpture, 
and, together with other similar species from peninsular India and 
Ceylon, form a very distinct group by themselves, which I propose 
to figure together later on. 
Figured from specimen in the Benson collection at Cambridge, in 
which there are five specimens labelled as from Tenasserim. 
Major diam. 10-0, alt, axis 7-0 mm. 
SrraLa Rimicota, Benson. (Plate IX. fig. 2.) 
Helix rimicola, Benson, Ann. & Mag. N. H. 1859, iii. p. 266; 
Pfr. Mon. Hel. vol. v. p. 71; Conch. Ind. p. 28, pl. Ixi. f. 1, 
Macrochlamys rimicola (sec. D), Theob. Suppl. Cat. p..19. 
Original description :—‘‘ Testa viv perforata, orbiculato-pyrami- 
data, tenui, fragili, oblique striatula, diaphana, pallide cornea ; 
spira conica, apice obtuso, sutura leviter impressa ; anfractibus 53 
convexiusculis, ultimo convexo, compresse rotundato ; apertura obliqua, 
subquadrato-lunari, peristomate tenui, recto, margine columellari 
verticaliter descendente, basali arcuato. 
“Diam. major 44, minor 4, axis 4 mm. 
“Var. peripheria primo subangulata, angulo versus aperturam 
evanescente, in Juniori mags conspicuo, 
