UG ON THE CAVIES OF THE GENUS DOLICHOTIS. [Feb. 6, 



between what he calls the plicate and cumulate types of placenta 

 may at least be supposed to have once existed, I must still, for the 

 reasons given above, express, to my great regret, my inability to 

 accept his conclusions until stronger evidence is forthcoming. 



EXPLANATION OF PLATE III. 



All the figures were drawn with the Camera Lucida, obj. Zeiss 2 mm. achr., 

 oc. comp. 4. 



Fig. 1. Cow. Phagocytic columnar trophoblast-cells from the base of a foetal villus. 



(Length of fuutus 7'5 cm.; about 3rd month.) (pp. 78, 86.) 

 Figs. 2 & 3. Phagocytosis in the trophoblast of the Sheep (nearly full time). In 

 {ig. 2 notice the aggregation of the ingested corpuscles into clumps, (p. 86.) 

 Fig. 4. Cow, 4 months. Brown pigment-granules 



(a) in maternal blood-vessels (on the right) ; 

 (/3) in the cubical epithelium of the crypt (in the centre) ; 

 (y) in the trophoblast of a fuetal villus (on the left), (p. 93.) 

 o. Cow, 6th month. Trophoblast at the base of a villus. One of the cells 

 contains an ingested mass (compare fig. 1) ; sinall brown pigment-granules 

 are forming upon this. (p. 86.) 



6. Cow, 4 months. A later stage in pigment-formation. The cells contain 



large irregular yellow-brown masses, (p. 86.) 



7. Full-time epithelium of the Sheep. Normal uterine epithelium from the 



outer surface of the cotyledon. Note the basal vacuoles and the brown 

 pigment, derived from the haemoglobin of extravasated corpuscles, in the 

 subepithelial connective-tissue cells, (p. 78.) 



8. A small portion of a section through a villus ; from a Calf of about the 3rd 



month (length 9 cm.). Notice, in the trophoblast, cells which look like 

 goblet-cells {gL), and large oval biuucleate cells {hi.). The capillaries 

 {cap.) come very close to the surface ; c.t., connective tissue, (p. 80.) 



2. Note on the Cavies of the Genus Dolichotis and on Living 

 Specimens of D. sal'inkola. By Sir Edmund Loder, 

 Bt., F.Z.S. 



[Received February 6, 1906.] 



(Plate IV.*) 



There had been some little confusion and controversy with 

 regard to the three species or subspecies of Dolichotis until the 

 subject was cleared up by Mr. Oldfield Thomas in the 'Annals 

 and Magazine of Katural History,' April 1902. 



In Proc. Zool. Soc. 1875 there is a paper by Dr. Burmeister, 

 of the Museum at Buenos Aires, in which he describes and gives 

 a figure of one of two specimens which he had secured from 

 Dr. Berg. 



He recognised them as a new species under the name of 

 Dolichotis salinicola. Both specimens are stated to have been 

 young. 



In Proc. Zool. Soc. for 1876 there is a second paper by 

 Dr. Bui"meister, called "Additional Note on Dolichotis salinicola," 



* For explanation of the Plate, see p. 97. 



