28 ACA.Vl ll<" IIH I B, 



.surrounded by a wide smooth band. Qirdla tewoy, ornamented 

 with gleaming white, glassy tufts. 



Length 35, breadth 20 mill. (Rochebr.) 



Straif iff Magellan, 



1 l; . M :. Sci. du Cap Horn, vi, 



1 34, t. 9, f. 2a, 2b (1889). Not C. stigma Costa. 

 It is evident that l>nt little dependence can be placed on the 

 figures of this spe 



A. BISULCATl> I'il-hry. n. sp. IM. 4, figs. 86, 87. 



Oblong, elevated, carinated, the side-slopes flat and straight. 

 Buff, maculatrd with olive-green and dark green, or greenish with 

 dark green and blarki.-h mottling. 



Anterior valve having the evenly granulated tegmentum extend- 



ing tw- thirds of the distance to the edge of the teeth. Intermediate 



valves (fig. 87 i having a very broadly heart-shaped tegmentum : 



lorsal area triangular, con vex ly raised, longitudinally striated. 



? areas duUnctly edfieot* or li<>l!<rl < t /it on ,///// .tide of 



'lorsal area; covered with rather thickly distributed, drop- 



d flat or concave pustules (fig. 86) averaging about one-sixth 



nill. IOIILT. Pnnb-rior valve li'iving tlif ft <jm< ittimi symmetrically 



oval, the long axis of the oval transverse to that of the animal ; 



'. <nherntral. 



Interior bluish. Insertion-platesand teeth normal. Tract behind 

 the sinus spongy. Posterior valve having one slit on each side, but 

 hardly a perceptible sinus behind. 



i. it her wide, densely clothed with whitish spim-h-ts, and 

 ILJ 9 tufts on each side. 

 Length about 22, breadth about 9 mill.; divergence 100-110. 



_rh the habitat of this species is unknown to me, I antici- 

 iitliriilty in its recognition. The shallow but distinct sulcus 



on each .- dorsal area is a diagnostic feature, but unfortu- 



nai.-ly i.* not shown in the figure. 



Undeten / unrecognizable species of A <-u // / // w 



A rBnm Kochebr. Shrll br.,a.l. ovate. s.M.ty, 



carinated, subumbona- antrrim \alvc nuindrd, p>terior 



8Woi: valv.- havin- tin- cfiitral areas tran-vt r~. ]y 



rou^ itaral arcat with spftrae, wide tubercles, (lirdle wide, 



