600 SUPPLEMENT. 
of 6, and the aperture, including the peristome, 4% millim. ; Pfeiffer himself? gives 
13-15 in length, 6-74 in diameter. 
Var. procerume 
Chondropoma cordovanum, var. 8. procera, Fischer & Crosse, loc. cit. p. 208, t. 41. figg. 6 c-e°. 
With conspicuous interrupted bands and a pale unicolorous peristome. 
Long. 12, diam. 63; apert. 43 millim. 
Hab. E. Mexico: Cordova, with the typical form (Sad/é°). 
Var. igneum. 
Chondropoma cordovanum, var. ignea, Fischer & Crosse, loc. cit. pp. 208, 209, t. 41. figg. 6 f-h". 
Cyclostoma cordovanm, Boucard, Bull. Soc. Zool. Fr. iii. p. 170°. 
With obsolete bands and bright orange peristome. 
Long. 10, diam. 6; apert. 4 millim. 
Hab. Guatemata: Cahabon (Sarg *). 
Chondropoma acerbulum (p. 17). 
Chondropoma acerbulum, Fischer & Crosse, Miss. Scient. Mex., Moll. ii. p. 210, t. 41. figg. 4, 4.a-d*. 
Chondropoma radiosum (p. 18). 
Cistula radiosa, Fischer & Crosse, Miss. Scient. Mex., Moll. ii. p. 188, t. 42. figg. 1, la, 6, 2, 2a, 
8, 8 a-d"*. 
These authors distinguish two varieties, chiefly according to the size, the largest 
measuring 20 millim. in length and 9 millim. in diameter, both found with the typical 
form by A. Morelet in Peten. , 
Chondropoma sargi (p. 18). 
Cistula sargi, Fischer & Crosse, Miss. Scient. Mex., Moll. ii. p. 191, t. 42. figg. 4, 4a-1, 5, 5a, 
and 6°. 
To the localities given, add :— 
[N. Guarema.a:] San Miguel de Tucuru, Alta Vera Paz (Sarg *). 
Of this species, also, Fischer and Crosse distinguish two varities of minor importance, 
found with the typical form, which differs from the nearly allied C. radiosum in the 
finer sculpture (see their fig. 4¢ as compared with 16). They also figure the young 
shell (figg. 4 d—f). 
9 (a). Chondropoma martensianum. 
Chondropoma martensianum, Pilsbry, Nautilus, xin. p. 140 (April 1900) *. 
Hab. S.E. Mexico: Mountains of Poana, Tabasco (Rovirosa !). 
