ll* LEPIDOPLEUBU8, 



of longitudinal Bubgnuno0e striae. Macro sabcentral ami prominent. 

 Tlit- lateral areas are slightly ra: 



\. bivadth 7 mill.; <livergence 100. 

 i/. .- ray, ''<//.. t T<><1.< Santos Bay, L. C<tHfrn'i<t. 



/.. ft rntj'itn.4 ( 'i'i:. .U.S., p. 3. 



This form resembles somewhat the 7>. granolirotiu, but it is much 

 finely -culptinvd. the arch of the valves is narrower and the 

 al areas are less stnmirly marked by concentric- wrinkles. It 

 i-- likely that (lie following is merely the young of this, but I have 

 not Keen able to compare typical specimens of internexus. 



L. i\ irpenter. 



Sh-ll similar to L. nexus, but much smaller, orange colored. 

 Valve- i. -iilarly arcuate, without jugum. Sutural plates small, 

 triangular: sinus larger. Girdle with more solid scales, scarcely 

 pilose, i ( >-.) Length 41, breadth .31 mill.; div. 90. 



Santa Barbara, O.///Vor///'/. 



A. inh-rnexus CPR. MS., p. 3. 



L. CERGl iii \MS Haddon. PI. 1, figs. 14-17. 



Shell. Minute, smooth, or with scattered minute tubercles ; the 

 -idi- meet at an aii.irle of about 100; sutural lamina' small, tri- 

 anirular. 



Anterior valve. Small, smooth, with scattered aborted tubercles. 



Int'Tinediate valves. (V-ntral area smooth, with very faint longi- 

 tudinal >tri;e; lateral areas scarcely discernible, with faint radial 

 -tri:e and minute concentric interrupted ridges towards the apex, 

 which pa>- into inconspicuous small scattered tubercles. 



I 1 sterior valve. With full rounded umbo, behind which is a 

 >hall)\\ d< presHon. Anterior area : similar to the central areas of 

 the intermediate valves. Posterior area similar to the anterior 

 val- 



(iiidlc. Narrow, with delicate scales. 



< '"lor. rniform whitish. 



. Length 3, breadth !'." mill. 



< iills. Posterior, i-ht or nine in number (Haddon.} 



Balfour Bay, Royal tfnun<l. Kerguelen, 60 fms. 

 L. I:- r./nelensis HAD., Challenger Hep. xv, p. 12, t. 1, f. 3; t. *J. t. 

 3a-3e. 



L. PAOl R8TB HER] rf.-li:-i. I'I. '2, figs. 39-40. 



Shell . l-shapfil, with the dorsal anirlc rounded; 



red \\ith a tine, indistinct, irregular granulation, without dif- 



