WORMS. TESTACEA. 67, Anomja, 



48? 



#U*. Shell 2-lobed, equal, ftriate. 



Found hitherto in a foflile (late only. 



ffcrcwf*. Shell orbicular, flat, pellucid ; hinge with 2 linear callofities 



growing internally on the (hell. 

 I//?*r <**& tab. 22$, fig. 60. ta£. 226, / 61. 

 SebaMuf. 3. ta£. 90. Knorr Vergn. 2. /*J. 24. /.I. 

 C^w*. <™r£. 8. tab. 79. /%. 716. 

 Inhabits the /«///«» Pr*a«; 5 inches long and as much broad: 



Jhell white, mining, filvery within, pellucid, thin, brittle, with 



very fine longitudinal ilrise eroding the arched tranfverfe 



wrinkles ; upper-valve nearly flat. 



phf Shell rjearly quadrangular, convex, and very neatly clofed, 



bronzed ; the margin repand. 



Bonann. Mufi Kirch. 2, fig. I 35 \ 



Seba Muf. 3. tab. 90. the middle figure. 



Chemu csneh. 3. tab. 79. /§•. 7 1 4. 

 2. Shell lefs, one valve white. 



Rump/. Muf. tab.^J. B. Gualt. te/t, t. 104. B, 



Petiv- Amb. at}, tab. 20. fig. 3. 



SebaMuf 3. jMffti 90. 



Inhabits the Indian Ocean; refembles the lafl. 



Shell lamellate, glofly within, often above 7 inches long and 

 broad, with a few pale chefnut rays, and innumerable longi- 

 tudinal (trig; reflecting iridefcent colours towards the margin ; 

 hin«e with 2 callofities convergent towards the knob. 



t$pincfa; £hell covered* with (pines as long as the (hell. 

 Inhabits England, in a foflile (late. 



Jculeata* Shell roundifh, prickly, the crown fmooth and recurved 

 hehind, 



Chemn. conch. 8, tab. 77. fig. 702. 



Inhabits Norway Jeas, on Fuci and Zoophytes : lower-valve flat, 

 fmooth and perforated at the crown. 



Muricata* Shell hyaline, ventricofe, the, crown bent towards the 

 right: upper-valve longitudinally (triate, the (I rise 

 ending-in Icales and hollow fpines. 

 Chemn. cench. 8. p. 65. vign. I 3. /ig. A, B. 

 2. Chemn. conch, 8. p. 65. vign. I 3. //g. C, D. 



Inhabits Guinea. Shell fnowy ; thai lower-valve flat and very, 

 thin, the circumference of the perforation elevated, with a 

 lateral tooth. 



Squama, 



