148 Zoological Society. 



in the Cetacea." In this Memoir the author regards the mammary 

 glands of the Cetacea, so analogous in structure to those of Ornitho- 

 rhynchus and Echidna, as having a function similar to that which he has 

 attributed to these latter : he assumes that the fluid secreted by them 

 is not milk but mucus, and that this mucus is not sucked by the 

 young, (whose organs of deglutition he describes as being unfitted 

 for sucking,) but is ejected by the mother into the water, the element 

 in which they dwell, where, by imbibition of a portion of the water, 

 it becomes thickened, and, floating by the mother's side, is devoured 

 by the progeny. 



M. GeofTroy has subsequently changed his opinion as to the na- 

 ture of the fluid secreted by the nutrient glands of the Cetacea. He 

 had had an opportunity of examining these glands in some Porpoises, 

 and had found the secretion to be actually milk. He still, however, 

 maintains that the young of the Cetacea do not suck, but that the 

 mother ejects the nutritious fluid from the milk receptacle into the 

 mouth of her young. 



April 22.— Some Notes by J. B. Harvey, Esq., Corr. Memb. Z. S., 

 were read : they accompanied a collection of Shells and Crustacea 

 made by the writer on the coast of Devonshire, near Teignmouth. 

 The several specimens were exhibited. 



Among them were numerous individuals of Cyprcea Pediculus, Cyp. 

 bullata, and Cyp. Arctica. Of the former there are two varieties, 

 one spotted and the other without spots. The spotted variety, Mr. 

 Harvey states, is generally smaller than the plain one, and is less pro- 

 duced on one side near the apex. 



Cyp. bullata is found in the same localities as Cyp. Pediculus, but 

 it may be doubted whether it is the young of that species : it is so 

 comparatively rare, that Mr. Harvey has dredged up only six speci- 

 mens of it, while he has collected more than a hundred of Cyp. Pedi- 

 culus : he possesses, moreover, young individuals of Cyp. Pediculus 

 of smaller size than specimens of Cyp. bullata. In the latter the 

 whorls are more produced at the apex, and the shell is so delicate as 

 to be broken by even a slight fall. 



On Cyp. Arctica Mr. Harvey remarks, that although its size and 

 appearance are in favour of its being a young shell, he hesitates in 

 referring it to the immature condition of the unspotted Cyp. Pedicu- 

 lus : his principal ground for doubt is the extreme rarity of Cyp. 

 Arctica. He inquires, however, whether the young animal may not, 

 perhaps, live deeply imbedded in the sand for a certain period before 

 it comes to the surface, and thus generally elude the search of the 

 conchologist until its shell becomes matured? 



With the Shells Mr. Harvey had transmitted to the Society living 

 specimens of Caryophyllia Smithii, Brod., the Torbay Madrepore, 

 whose habits were described by Mr. De la Beche in the ' Zoological 

 Journal ' a few years since : these individuals died on the journey. 

 They are attainable only at the lowest spring tides. They may be 

 kept alive in sea water, changed every second or third day, by feed- 

 ing them with a very small piece of fresh fish scraped, and deposited 

 with a quill upon the animal, by which it is sucked in in a manner 



