680 
Proceedings of Royal Society of Edinburgh. 
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Plate III. 
Coscinodiscus implicatus , sp. n. x 330. 
,, prcetor, Grove MS. x 660 (central portion) 
,, prcetor, Grove MS. x 660 (periphery). 
„ polurrhaptos, sp. n. x 660. 
,, partitus, Grove and Sturt MS. x 660. 
,, subtilis, var. scabra, nov. x 660. 
„ excavatus, var. deliquescens, nov. x 660. 
„ luctuosus, Grove MS. x 660. 
,, luctuosus, Grove MS. x 660 (zonal aspect). 
,, lewisianus, var. similis, nov. x 660. 
,, implicatus, var. picturata, nov. x 460. 
,, periTcompsos, var. curta, nov. x 660. 
Liradiscus marginatus, Grove MS. x 660. 
Brightwellia coronata , var. radians, nov. x 460. 
Actinogonium multiradiatum, sp. n. x 660. 
Brightwellia excellens, sp. n. x 660. 
Porodiscus nitidus, var. armata, nov. x 660. 
Asterolampra tenerrima, nov. x ? 
Porodiscus spiniferus , sp. n. x 330. 
Asterolampra tenerrima, nov. (small form), x ? 
Porodiscus major, var. densa, nov. x 660. 
Asterolampra traducens, sp. n. x 660. 
Liradiscus furcatus , Grove MS. x 660. 
