'"'Itwi" J PKOCEEDINGS oF THK NATH»XAL Ml-SEIM. 313 



44 Heterodoiiax bimaculatus <>rii. 



(Jiif s|M-ciiiu'n. 

 Piinaiua. 



45. Tellina piinlcea I(t>rii. 



Fia;:iiM*iits (it «Mn* valvi'. 

 I'iivta. 



46 Tellina Maconia i plebeia lliiiiley. 



Pol t it»ns ofniu' \ al\ r. 



i'aiiaina. 

 « 4 7 Tellina . Capua 1 excavata Sliy 



A siiij:U' valv*' frnrn racli ortlic rollowiii;,' Incalitics: 



I'ayta; (liatliaiii Islainl, ( talapa;,'<).s. 



Tilt' fl;;iMV of tlii» alM)vt» in I{«H»vt»'s inoiiofrrapli, without liahital, aprces 

 .so Well with thMslnll Ix't'ort' iiii' th.it I fvv\ ctMtaiii It was iiia<U' from 

 ail ••vaiMphM)!" tht« saiiu' loriii ; it may Ix- that tht* valvi's rolh'i'liMl by 

 |)i. .loiK's ai"c a wliit*" variiMy of /'. homUtyi of Haiih'y. 



Tho jn'culiar form of th<'s«» sh«'ll.s has led to their lu-iiij,' |>h»eeii here 

 and there l»y «litV«'ieiit aiitliors. and ('d/j.svf has Itceu a sort of eateh- 

 all for forms often t|iiite unlike. I liave used it in this instanee in 

 aeionlanee with Adams's (ieuera. 



48 Semele proxlma ('. H. A<1. 

 One valve. 

 Tanama. 



49 .St-melr (oiiur.it.i ^''■, 

 ( >dd valves. 

 l*ayta ; l)tid ^I.lI|■•^ Nl.iinl. I'.iv i>t r.iiiMiim, 



5U Mactra velata I'lill. 

 0<ld valves. 



Chathani Isl.ind. < ialapa<;«vs; Hahia: Mauta ; Tayta. 

 The facii's of this M.ietra is <|uite characteristi*' and persiHtent. 



51 Mactra angulata *>r;i. 

 Odd valves. 

 Manta: I'atiania. 



52 Solecurtim coqiiimbenBin '^'■> 



One adult (lM»th \alves), .T^ iuelies iu breadth ; als<t an odd valve of 

 a smaller example. 

 Payta. 



53 Solcn MidiB ( . H. Ad. 



One speeiu)en. .^ 

 Panama. 



