62 
Tom IliEDALE. 
Fig’d. Pilsbry, ilaii. Couch. (Tryon), Sor. 2 (pt. 23), Vol. VI., p. 
187, pi. 30, flg.s. 7. n, Copies oC Ihirten’s figs. Dee. 16, 1890. 
The tyjH' and a seines of paratypes are bright shining white with a 
subsutural and a iieripheral narrow band of golden brown of medium eleva- 
tion, siibglobose, .spire whorls slightly rounded, sutures lightly impressed, 
last whorl well rounded, base convex, outer lip thick, rellected, columella 
short, rellected, sealing the umbilicus. Ape.x apiiarently smooth but showing 
fine radial growth lines, the adult sculjiture consisting only of similar growth 
lines with n \’ory fine concentric lining. The type measures 25 mm. in 
breadth by IS mm. in height, and for this solid form of lihagadoid sliell a 
new subgenus, Tumegada, is proposed, conricla Cox being the orthotyi-ie. 
The jiaratypes show com])aratrvely little variation save in the number 
of the coloured bands, some having two or three .above the periphery and 
six or seven thin ones below th(> periphery, ilany odd shells from the general 
locality differ in detail but the reason for the differences cannot be ascer- 
tained without exact locality. However, one siiecimen from the Strelly 
River, collected by Dr. .1. R. Cleland, is smaller with less elevation, measur- 
ing 20 mm. in breadth by 14 mm. in height, and may rejn'csent a new sub- 
species R. c. strella nov. 
A couide from Tambrey Station, Fortescue River, are as large as the 
preceding' but Hatter, duller in coloration and measuring 20 mm. in breadth 
by 13..1 mm. in height and these may be subspecilleally named R. c. tambra 
nov. 
A series collected on Rosemary 1. (so named by Dampier) shows a 
brownish-white shell with three or foui' iiale brown bands, the specimens are 
smaller than the typical form but coni])nratively more elevated, the type 
measuring 18 mm. in breadth by 14 mm. in height, and is regarded as a 
subspecies R. c. perprima nov. 
Rhagada tescorum Benson 1853. 
Plate TV., fig. 14. 
185.3 — Helix tescorum Benson, Ann. IMag. Rat. Hist., Ser. 2, Vol. XI., p. 
30, Jan. 1. Shark’s Bay, West Australia. 
Fig’d. Reeve, Conch. Icon., Vol. I'll., id. 171, si>. 1154, Oct. 1853. Cox, 
i\Ton. Austr. Land Shells, |). 63, pi. IX., fig. 5, Dlay 1868. 
1890 — Helix feseoridii Pilsliry IRan. Conch. (Tryon), Ser. IT., Vol. VI., 
]). 187, Dec. 16, for Tryon, Vol. TV., p. 256, pi. .36, f. ,34, Jan. 3 
1889. 
1894 — Helix tescorum Smith, Proc. Malac. Soc. (LoiuL), 5T)I. I., ]>. 89, June. 
Smith noted: “In form and size this siiecies is very like H. ronricta; 
it is, however, remarkable for the caniculate (sic) suture” adding “It is 
within the range of possibility that this feature is due to weathering. If, 
in reality, such be the case, this species should undoubtedly be united with 
H. convicta.” 
Benson remarked, “the single specimen ... is apparently in a sub- 
fossil state.” 
Rhagada osca'rensis Cox 1892. 
Plate TV., figs. 15-16. 
1892 — Helix (Hadra) oscarensis Cox, Proc. Linn. Roc. N.S.W., Ser. 2, Vol. 
VI., p. 565, pi. XX., figs. 6-7, May 23. Oscar Ranges, 20 miles 
from Derby, Xorth-lVest Australia (IV. W. Froggatt). 
