MAZATLAN UNIVALVES 447 
566. SCALARIA —, sp. ind. (a.) 
Tablet 2038 contains a minute shell of four whirls, measur- 
ing °045 by °023, anda fragment displaying sculpture. It is 
elongated, with very numerous (about 15) rounded varices, 
strongly striated spirally. 
Hab.—Mazatlan ; 3 sp. on Spondylus ; L’pool Col. 
* 
567. SCALARIA —, sp. ind. (b.) 
Tablet 2039 contains a minute shell, measuring ‘06 by ‘037, 
consisting of 6 whirls, of which 4 are smooth and nuclear. It 
differs from the corresponding portion of S. suprastriata in 
having more numerous (12 sharp) varices, with smooth inter- 
stices. 
Hab.—Mazatlan ; 1 sp. off Spondylus ; L’pool Col. 
568. ScALARIA RARICOSTATA, 72. S. 
S. t. elongatd, gracili, anfractibus parum rotundatis ; suturé 
parum impressa ; costis paucis, circiter vill. haud semper con- 
venientibus, angustis, haud elevatis; interstitiis levibus ; wm- 
bilico nullo. 
The only specimen found, of 6 whirls, though young, seems 
to differ from the early state of all known West-coast species. 
Long. °125, long. spir. °085, lat. *06, div. 33°. 
Hab.—Mazatlan ; 1 sp. off Chama; L’pool Col. 
Tablet 2040 contains the specimen. 
Suscenus CIRSOTREMA, Morch. 
H. & A. Ad. Gen. vol.i. p. 223. Shell solid ; varices irregular ; 
whirls generally cancellated. : 
569. CIRSOTREMA FUNICULATA, /n. Ss. 
C. t. subelongatd, graciliore, alba; marginibus spire rectis ; 
anfr. ix. prope suturam valde impressam acute angulatis ; 
costibus variantibus (xv.—xx.) haud acutis, angustioribus, ad 
angulam coronatis, supra basin vie continuis ; anfr. ult. eostis 
plerumque obsoletis, varicibus paucis validis ; costa rotundata, 
suturam continuante, curca basin tumente, & costis radiantibus 
