430 MAZATLAN UNIVALVES 
Hab.—Mazatlan; extremely rare, off Spondylus ; Z’pool Col. 
Tablet 1995 contains a specimen presented by R. D. Dar- 
bishire, Esq. 
(c.) Gibbous and uncertain species. 
£ 
525. CHEMNITZIA GIBBOSA, 2. 8. 
Ch. t. pupiformi, rufo-fuscd, spire marginibus utringue ex- 
curvatis ; vertice nucleoso ?... ; anfr. normalibus x., planatis ; 
liris transversis subexpressis, subrotundatts, rectis, circiter xvi. 
ad apicem continuis; labro ?...... 
This species is described, although from a solitary and very 
imperfect specimen, in consequence of its great peculiarity of 
form, in which it resembles Chrysallida. It is short, stumpy, 
and very broad; without any trace of fold on the columella or 
notch on the base. Long. °27, lat. °1, div. 25°. 
Hab.—Mazatlan ; off Chama, extremely rare; L’pool Col. 
Tablet 1996 contains all that was found, viz. the broken 
specimen, and a fresh fragment displaying sculpture. 
526. CHEMNITZIA 
—, sp. ind. (a.) 
Tablet 1997 contains the spire ofa very stout sheli, with 
about 12 very stout ribs on each whirl, running in continuous 
diagonal lines to the apex. There is no trace of columellar 
plait. 
Hab.—Mazatlan : 2 sp. off Spondylus ; L’pool Col. 
527. CHEMNITZIA —— 
. sp. ind. (b.) 
Tablet 1998 contains the spire of a Eulimoid shell, of alabas- 
trine texture, with about 20 extremely faint ribs, running in 
diagonal lines tothe apex. It is not so broad as the last species. 
Hab.—Mazatlan ; 1 sp. off Spondylus ; L’pool Col. 
528. CHEMNITZIA ————, sp. ind. (c.) 
Tablet 1999 contains a very small specimen of a large species, 
too young to identify, as it has only one normal whirl and a 
half, strongly shouldered, and with numerous very fine ribs in 
the upper part. The sinistral portion is large, and the junction 
of the two is very conspicuous. Long. ‘035, lat. “O19. 
Hab.—Mazatlan ; 1 sp. off Spondylus ; LZ’ pool Col. 
