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regards them as biliary ducts which open singly into thestomach. He also gives a different account of the positionof the anus and of the genital apertures. In Actceon theanus is not placed posteriorly in the middle, but anteriorly,on the right side, in the form of a minute papilla, and thegenital orifice is not in common, but in the female issituated on the right in form of a minute fissure, whichruns from the anus towards the under surface of the animal;in the male the opening is also situate on the right sideat the base of the tentacle.
It follows of course that Quatrefages should defend him-self against such an attack. (Comptes rendus, xix, p. 806.)He allows that separate genital apertures exist in Venilia,and at the time of copulation, also in the Tergipedina, alsothat the branchial appendages are perforated at the point.But with respect to the latter he thinks that they are not asit were supplementary anuses, but that they serve for theejection of spiculac, which correspond in almost all respectswith those of the Actiniae, Medusae, and Synaptae. On theother hand he denies that the branches of the intestinalcanal open singly into the stomach, and that they arebiliary ducts, because he has observed the food enter andagain leave them; he also denies the existence of veins.
Another attack upon the observations of Quatrefages , andwritten in a much more peaceable style than the above bySouleyet , appears in the Annals (xiv, p. 125), by Joshua Alder and Albany Hancock . The authors regard the genusEolidina as identical with Eolis. They look upon theabsence of the anus, of the male intromittent organ, and ofthe complete circulatory organs as the fruits of inaccurateobservation. In conclusion, they express the opinion thatQuatrefages has been very premature in instituting hisdivision of the Phlebenterata. After all that has been saidfor and against the Phlebenterata, I feel myself compelledto say that precise inquiries as to the history of thedevelopment of these animals are highly desirable. At allevents they must constitute a separate division (family),