ol) it, |,,. 



Blda, with "ii. !.. three pofteri'ir tilan, 

 liu-ual teeth 



Pull 



iet and -viion 



IIIOIT. l-'roiii their minute -i/. ii i 

 main to l.r ,|,- -rih.-d. 'II,, \ inhabit all 



!<>0 fathom-. I. Ill In-ill- |,||\|. .11. .W 



\\ater. near -lioiv. ,,11 |>, d- ,t 



Then- an a f-\\ BOOOndai M>ally 



found fossil in tmiarx i 



Hi .ia is active and hold. tl..at- lik.- it- congeners, ai 



l>\ al thread instantly upon h.-in- d. larh, ,| tn.n, 



inivam plaj of the tentacular cilia i- \.T\ 'trikin^. ThepalliaJ 



tilann'nts jn-ohahly a IT. likr tlir trnta'l-. tartilr in t'linction. 



Siih-vnn> Ki >i \ M'li-u Strict 



Shell rlon-atrd conic, longitudinally co-tat. ; ajM-riiin- 

 with a tliickcncd |H-ri<tonir h.-ari: ri-.r rih. 



II. \ i N i i:i "-\. Desmarest. 



The character- >t' the f>llo\vinir >uhordinate ^nni| M 

 into another that in many ca>e- tin- ivle-al i<>n t' -] 

 tictllar division is an entirely arhitrary matter. I -hall in.l 

 the -ection- ; hut it must he under-tood that maiiy.'t'tl 

 have Hot heell a i-lied heretot't'l-e to ailV -cctioli. and tl 



heloni:- to t\\o ..r more -ection-. acroi'din- tn the variation of' their 



character-. No doubt the institution of <livi-ion- t'oundi-d u|x>n 



such unsubstantial <-haraeter> has ten. led to the undue multiplica- 



tion of specie- ; but I am unable t 



nonyiuy this can only be done by on,- \\lio \\ill 



the -uhjcct. a- a -pccialty. 



A i'i< i i \ 1:1 \. IfonteroMito. ' i 



Shell turbinate, whorls and apertiife more nu: 

 -tice- of the rounded rib- -pirall\ -triatc. I; 'hil. 



Section Ui--< .-i. .MI \. San. : 



Shell verv thin. -mo.. th 01 -lightly longitudinally c. .- 

 with /Sir/air loniritudinal fulvoii- markings. 



