Ill' KCHNOCHITON, 



uarted. the warts lohed. Mucro anterior, slightly 

 Interior having tin- central valve with 1 slit, end valves 8-10 slit-. 

 ii acute; sinus flat, very wide. (iirdle imhrieately 

 Length !">. breadth 7' mill.; divergence 110". < ( )/r.) 



J'ltHIIIH'1. 



danuti CIM:.. I*. /. s. 1st;:;, p. 24. 

 adatnsi* CPB., 1'. /. S. 1866, p. 'J74. 



Tlie -hells which I have drawn in figs. .">1 -.">."> of pi. 18, seem to 

 me to belong to this species rather than to /. <l!.<]>ar. They are 

 described In-low. It must he understood that the more minute 

 sculpture can be seen only under a compound ini<To>mpr <>r a very 



Mul lellS. 



The shell is oval, rather low, the jugum rounded. >ide->lop. s 

 nearlv straight. Color dark olive mottled with lighter, or having 

 large whitish tracts on some valves; the interior light blue, sutuml 

 l>l<ite.-< u'liite. The central areas are closely sculptured with very 

 minute pointed whitish granules, arranged in oblique lines at the 

 juiriini (fig. 52) but toward the sides or pleura a system of shallow 

 grooves with graniilon< inter-ridges curve forward from the diagonal 

 line, as shown in fig. f>4, and at the left side of fig. of). The lateral 

 areas and terminal valves have a coarsely reticulated pattern, 

 formed by impressed zigzag or irregularly lobed impressions, over 

 which a tine granulation extends (h'g. oo.) 



The interior has 8-10 slits in the posterior valve, 1 in the inter- 

 mediate valves (fig. .">:]). Teeth sharp, smooth ; eaves very narrow. 

 The -jirdle was denuded of nearly all of its scales in both of the 

 imens before me, but such as remain are large, solid. 



Length 14, breadth 8-] mill. 



I. TI:M D9CULPTU8 Carpenter. l'nfnjnr1. 



Shell similar to I,. <l#n /.</'/; olivaceous, minutely variegated with 



paler and darker color. Kntire surface minutely granulose : lateral 



areas scarcely defined ; suture- spotted with white: mucro anterior. 



rather conspicuous, the slope behind it com-avr. Interior a> in /.. 



'/ir.) 



Panama, 



Chil'in ili^mr ('. H. A I)., Cat. Panam.Sh.no. 373l part . /.. />i'ln- 

 kU <'ri:.. P. Z. 8. 18 '. p. -J7-"). 



A variety is paler, tinged with rufous at the jugum. 



