336 PKOCKEIMNGS OF THE MALACOLOGICAL SOCIETr. 



None are denticulate. The stomach is rather large and not enclosed 

 by the liver. Its upper wall is laminated internally, one fold being 

 much larger than the others. Near the pyloric end is a diverticulum 

 of roughly cylindrical shape. 



The liver is covered witli a fairly thick layer of the hermaphrodite 

 gland. The duct of this gland is long ; the ampulla not largo. The 

 vas deferens is soft, extremely long, and convoluted. It exhibits no 

 dilatation Avhich can be called a prostate until tlie end, when it enters 

 a spongy elongate cone, which seems to be the penis-sac, with glands 

 adliering to it. No armature was found. 



Abraham observes that mantle spicules are absent, and I was not 

 able to find any. Otherwise the species seems to be a typical Archidoris 

 and does not belong to the section Anisodoris. Mutton's statement 

 that there is a central tooth cannot be correct, for, even if the identity 

 of the present specimen is disputed, it is absent in the type-specimen 

 of the British Museum (see Eliot, I.e., 1905). Hutton must either 

 have examined a wrongly labelled specimen or have been misled by 

 the way that the first laterals project into the rhachis. 



Aechidoris fulva, n.sp. 



Two specimens kindly sent me by Dr. Hoyle from the Manchester 

 Museum. They are labelled " E coll. Prof. Spencer, Australia, B.," 

 and preserved in formaline. The largest is 54 mm. long, 37 broad, and 

 22 high. The other is a little smaller. 



Both are plump and of a remarkable texture like a stiff jelly, except 

 for the hard excrescences noticed below. These excrescences are white, 

 but the colour is otherwise a dull brownish orange, rather deeper on 

 the under than on the upper side. The branchiae and rhinophorcs are 

 paler than the body. 



The back is covered with low soft tubercles of various sizes, the 

 largest about 2 mm. broad, but the majority smaller. All round the 

 dorsal margin, extending inwards as much as 20 mm. in some places, 

 ai'e hard excrescences, looking like a deposit of some white salt. 

 They spread over the tubercles, which they partly conceal. They 

 do not form lumps, but a layer with prominences not exceeding 

 granulations. There are similar excrescences, but fewer, on the under- 

 side of the mantle, on the sides of the foot and even on the sole, 

 but there are none in the centre of the back. Professor Palmer 

 Wynne, Professor of Chemistry in the University of Sheffield, who has 

 courteously examined them for me, says that they consist of calcium 

 carbonate and are not of the same composition as the spicules found 

 in the integuments, which do not effervesce in contact with hydro- 

 chloric acid, but dissolve. The excrescences look to me as if they 

 were found on the animal in its natural state, but it is conceivable, 

 particularly in view of their occurrence on the sole of the foot, that 

 they are a deposit due to the chemical action of the fluids with which 

 it has been treated. They occur on both specimens, but are more 

 numerous on one than on the other. 



The foot is nearly as long as the body, broad (28 mm.), with a thick 



