WORMS. MOLLUSCA. 5a. Echinus^ 
145 
Walk, movum. dikv. l /i. l8l, tab. E. ill. f. 4 - 
Verf^ derbatel. merk’iv iz tab, zz fig U 
Fouad hitherto among foiSles only. 
Siibconic with hh elliptic circumference : fpaces and ave- 
nues lo, the latter tran^verfely grooved and 
the margin, the former divided by a itraight excava 
future. 
K’ein echomd. ed. lesk. p 1 1*?- tab. 43 )/" , , ^r^rps 
Pound as yet only in a foffile ft ■ te t protu' ermees of races 
thickly placed and furrounded by a circle of granalitions, 
hafe flat, grooved 1 vent circular. 
' B. Vent placed beneaih ; mouth withmt tent acula. 
a. Bafe circular, in the periphery of which is.the Vent. 
Spaces in, covered with mimefous finall white tubercles, 
^ the krger ones united by a ferrate future and tranf- 
vcrfely lineate, the IclTer ones terminated by a foramen 
at the crown : avenues to, biporous. 
Plot. Oxforajh. § 35 - z. fig. 13. 
Morton iSorlhnmjjtonJ'h. p 235. »• r • 
Luid. lilhoyb Brit, p 47. «• 958 * 959 - 
Letk.ed, Klein echiood p. 162 tab. 13, A. tS/ 
Jl-ircv. Muf. metail. p 45 S> fi' 4 - 
Pesi. GuZoph. contin.ta'i. 
Lang lap. fg.p.izi^. tab. ^ 6 , fg. I, 
Mill. ech. ‘tuagr, p y, fig* l>, 
Breyn. eeb.p.^y. tab, 2, fig, i, 2. 
Bourg petrij ■ /> 77 ' tab, 0 ,"^, fi-g. ^01, 
Found hitherto only in a foflild hate. 
Suboval 1 timth orbicular, linall ; wnt ovate. 
Spaces to, the larger ones divided in the middle by a fu-. 
ture: avenues 10, biporous: crown depreUed: vent 
orbicular. 
Klein echin. ed, leA, p, 164. t. 40, f. S> 
JValcb dilwv, monum. 2. p. 180. t. E. 11 /. 6, 7. 
MelL ech. mjagr. p.y. t. t, f- z. 
Kundm,rar.nat.et art. S,fis*^^' 
Natnrl. hafel. Merkw. 22. tab. Zl, fig. H. 
Pound hitherto only in a tolllie date. 
moderate, with 10 fnarp fmuofities ; large, ovate. 
^‘b'ccjfks. 
YOL. IV. 
*Vuhari;t 
