m 



rum curvato, basi subsinuata valvisque postice paullo atte- 

 nuatis differt. Habitat Rockhampton. 



59. Mactra (Trigonella) radtata Dkr. 



Testa parva, ovato-trig^ona, subaequilatera, nitidissima, 

 albido-fulvescens, radiis fulvis picta; apices parvuli, violacei, 

 submediani, lunula areaque obtuse carinatae eleganterque sul- 

 catae; dentes laterales longiusculi, lamellares laeves; pagina 

 conchae interna laevis nitidissima pallide violacea vel radiis 

 subviolaceis signata. In parte posteriore pictura viridior esse 

 solet. — Long. 20 mill. Long. alt. et crass. ratio numeris 

 100, 80, 50 respondet. 



Mactrae pullae Phil, guineensi (Abb. III. p. 137. T. IIL 

 fig. 4) nostra species simillima est, sed Talvulis solidioribus 

 minus convexis, apicibus magis productis ideoque forma ma- 

 gis triangula nee non angulo sub nmbonibus latus posticum 

 versus decurrente distinctius expresso satis differt. 



Habitat ad insulam Chinensem Taiwan vel Pormosa dictam. 

 60. Mactra (Trigonella) laevis Dkr. 



Testa subelliptica, aequilatera, tenuicula, compressa, al- 

 bida, interne fuscescens concentrice tenerrimeque striata/ paene 

 glabra, nitidissima, in cardinis margine utrinque sulcata, epi- 

 dermide tenuissima subcornea vel straminea induta; umbones 

 mediani, subacuti, macula fusca signati; lunula areaque an- 

 gustae. — Long. 30 mill. Long. alt. crass. = 100: 78: 60. 



Mactrae (Trigonellae) stultorum Linnaei cognata, sed mi- 

 nor et satis diversa. Patria Mosselbay. 



61. Tellina clara Dkr. 



Testa ovata, inaequilatera, tenuissima, lactea, pellucida, 

 antice producta linea paene elliptica terminata, postice atte- 

 nuatg, brevis, convexiuscula striis concentricis nee non ra- 

 diantibus, tenerrimis, sub vitro tan tum clarius conspicuis in- 

 structa; umbones prominentes infiati; dentes cardinis mediani 

 et laterales minimi; ligamentum parvulum; sinus pallii maxi- 

 mu8 ob splendorem valvarum internum vix cognoscendus. — 

 Long. 17 mill. Long. alt. crass. ratio haec est: 100, 80, 40. 



Tellinarum minarum huiusque notarum certe elegantis- 



