538 Mr. W.S. Macueay’s Anatomical Observations 
The pharynx is lower than the anal orifice, but is not, as in 
the B. oviformis of Savigny, at the lowest part of the cavity of 
the body ; neither is the anus descending, as he represents it in 
that animal. The œsophagus descends, and conducts to a simple 
ascending stomach, provided with an ample liver, composed of 
many irregular lobes, the surface of which is minutely papillose 
or composed of rounded grains, which at first sight resemble 
ova. ‘The larger lobes of the liver are attached to that part of 
the stomach which is nearest to the pylorus, 7. e. highest. M. Sa- 
vigny has denied the presence of a liver in his species of Bol- 
tenia, and has even made its absence to be one of the characters 
of the genus*! If he be correct in this observation, which a per- 
son who has had so many opportunities as I have had, to admire 
his consummate accuracy, can scarcely doubt, then there is a very 
important difference between his two species and mine ; so im- 
portant, indeed, as to render me most desirous of having an op- 
portunity of examining the B. oviformis anatomically.— But to 
proceed with the details of B. reniformis: its long intestine 
mounts up as high as the base of the pedicle, and then descends 
nearly parallel to itself, and terminates in an ascending conical 
rectum and scolloped anus. There are two ovaries, unequal in 
size, but both placed longitudinally, so as to terminate near the 
analorifice. 'l'he smaller ovarium is on the side of the intestines, 
fitting closely into the ascending loop formed by the stomach and 
intestine. It is clavate, rather straight, and formed, towards the 
extremity, of sub-cubical lobes, which contain the ova. 'Thelarger 
ovary is on the opposite side, between the mantle and branchial 
pouch: it is undulated, and not so lobated as the other. All 
* In that part of the article Mollusca, in the Supplement to the Encyclopedia Bri- 
tannica, which relates to these animals, and which, by the bye, is little more than a 
transcript of Savigny’s admirable memoirs, we find the genus Boltenia characterized 
as having no liver. - 
these 
