ABQ, MAZATLAN UNIVALVES 
Tablet 2002 contains the larger specimen; the smallest is of 
a much darker colour. 
532. CHEMNITZIA FLAVESCENS, 7. s. 
Ch. t. gracillima, tereti, flavescente ; vertice nucleoso helt- 
coideo, marginibus spire rectis valde superante, anfr. U1. 
globosis, verticaliter sitis, apice conspicuo; anfr. normalibus 
subplanatis, lirulis rectis circiter xx. minime expressis, VIxe 
acutis, ad basin evanidis ; striulis circa basin rotundatam spir- 
alibus ; punctulis creberrimis interstitia decussantibus, sepe 
elongatis ; aperturd ?...... 
One somewhat imperfect specimen only of this species was 
found by Mr. Hanley. It is aerate between C. gracilior, 
(C. B. Ad. Pan. Shells, p. 167, no. 224.) and C. undata. It is 
however more slender than either, ae differs from the first in 
the very large size of the sinistral apex, and in the flattening of 
the early whirls, which in C. gracilior are much swollen in the 
early stage, though afterwards they are normally flattened. 
The ribs are also fainter, and the interstitial spiral grooving 
more decided. The specimen presents six normal whirls and 
measures Jong. ‘11, lat. 032, div. 13°. The sinistral apex is 
fully °U1 across. 
Hah.—Mazatlan ; 1 sp. off Spondylus ealcifer ; Havre Col. 
Tablet 2003 contains the‘ specimen, kindly presented by 
S. Hanley, Esq. 
533. CHEMNITZIA TEREBRALIS, 7. 8. 
Ch. t. “Ch. tenuilirate” simili, sed curtiore, compacta ; liris 
pauciorihus (circiter xx.) ad basin evanidis, supra extantibus, 
suturam profundam coronantibus ; columella ad basin producté ; 
labro ad suturam emarginato. 
A much shorter and broader shell in proportion than C. 
tenuilirata, stronger, with the ribs evanescent below the peri- 
phery, and muricating the suture ; they are not in continuous 
lines. There is a slight slit at the suture, as in Terebra, and 
an approach to an angle at the base of the columella. The 
shell, which has 8 whirls, measures long. ‘097, long. spir. °071, 
alt. ‘035, div. 20°. 
Hab.—Mazatlan ; 1 sp. off Spondylus ; L’pool Col. 
Tablet 2004 contains the specimen. 
