A reviewer, who agrees with Mr. Mivart in every detail, remarks on this structure: "It is impossible to believe that in any number of ages the first slight incipient tendency to grasp could preserve the lives of the individuals possessing it, or favour their chance of having and of rearing offspring."
Mivartekin xehetasun guztietan bat datorren kritikari batek egitura honi buruz ohartarazten du: "Ezin sinets daiteke, zenbatnahi denbora iraganik ere, oratzeko lehen joera hasberri ahulak, joera hori zuten banakoen bizia salba, edo ondorengoak izateko edo hazteko haien ahalbiderik gehi zezakeenik".