Thus, as Fritz Muller has lately remarked, in the same group of crustaceans, Cypridina is furnished with a heart, while in two closely allied genera, namely Cypris and Cytherea, there is no such organ;
Horrela, Fritz Müllerrek oraintsu ohartarazi duenez, krustazeoen talde beraren barruan, Cypridina bihotzez horniturik dagoen artean, beronen hurbil-hurbileko generoetan, Cypris eta Cytherea-n kasu, ez dago organo hori.