BTTHO in 



Length 3< ;, -jn m j||. < g 



I 



1 

 1>. I*:-); <>tia Conob., p. l 



arftheorginals] >"cie* is 1>, i, n . it is 



ded that the characters are quit 



; "' M-I-II Tapparone Canefri, li. 2, Bgs, l 

 Shell ovate, the valve* small; girdle 



Valves heart-shaped, barrowed in front, dilate,!, and somewhat 

 beaked in the middle behindi lasl rah 

 I mbonea obscurely transversely striated, areas minutely and do 

 granulated. Girdle much dilated, thick, densely < 

 bans, and having two series of setigerous pores. < 

 black-brown, sometimes variegated with white; -mil*, olive-b* 

 the pore tufts black. (T.-C.) 



Yokn 



Amycnla de-fiipjm T.-C. Zool. del Viaggio intoroo al glol 

 R. Fregata ' Magenta, 1 Malacologia, p. 78, t. 1, f. if,, \: )a .^ e . ( \ 3 

 -Stectoplax porrecta CJR., J/^S. and in Dall, Proc. U. 6 Mus. 



1881, p. 288 (no description.) 



Cauefri's figure of this species shows but seven valves, j.rol.aMv a 

 mistake of the artist. 



The species described by Carpenter seems to be identical. Car- 

 penter's oame was applied some years l.efore the app ( -araiuv OJ 

 Zoology of the 'Magenta,' but unfortunately was nevi-r pul.li. 

 HH- Oarpenterian species is evidently what Tapparom- 

 alludes to as a species of " Streiochiton " in the collection 

 K. Adams." Carj)enter's description is as follows : 



orrectou Carpenter. (PI. L>. fi^ s . 36-44). Valves two-thu 

 immersed, brown-olive; exposed part of the posterior valve iwn 

 the mucro a little l.<-hind the middle; anterior valve semicircular ; 

 median valves trilobed, projecting far forward at the ridge. , Dorsal' 

 una smooth, iu the voung >hrll lon-itudinally si riate and irninnlose. 

 Side areas con-pirn. m-ly irranose. 



Interior: posterior valve niopaloi.l, sli-htly sinual.-d hehind. 1. 

 ing one slit at each ride. Anterior valve havinj l,an 



6 1 slit (or sometime] al.nonnaliy : M 8 id e ); post. 



teeth long, the rest very Io.,, -..mute. Jugal until reryd 



wide, smooth, sutnral lamin;.- separa: 



