REPORT ON THE ANATOMY OF THE PETRELS. 23 
Cymochorea seems here to have progressed further still. The intestines are not capacious, 
but the commencing duodenum may be slightly dilated. 
The following are intestinal measurements :— 
Small Intestine. | Large Intestine. Ceca, bar bai of 
Oceanites oceanicus, aes “Ho — 10:0 
Garrodia nereis, — ie — 85 
Fregetta grallaria, tie ees — 13:0 
»  melanogastra, . eee one — 8:0 
Pelagodroma marina, ists aes — 12:2 
Procellaria pelagica, 8:0 1:0 075 eae 
Cymochorea leucorrhoa, . 9°9 6 C1 ie 
Prion desolatus, 195 Ewe set Are 
»  banksi, : ; é : 17:0 "25 2 Ate 
Daption capensis, . , c - : 330 14 (2) wae 
Thalasseca glacialoides, é - ‘ 48-25 1-4 2 ol 
Aeipetes antarcticus, . : : ; 50:2 1:2 3 ae 
Ossifraga gigantea, - - ; ; 94:0 2:0 a3) 7s 
Fulmarus glacialis, . ‘ : 3 53°5 15 25 vas 
Puffinus obscurus, . é ; : : 17:0 5 2 nan 
»  anglorum, : ; : 4 23:0 1:0 2 ae 
»  Orevicauda, : j : P 24:0 1:25 25 Se 
Majaqueus equinoctialis, : 3 : 54:4 1°75 *25 oes 
Cstrelata lesson, . ; - ; F 42-0 0 "25 ae 
Bulweria columbina, ‘ : 5 : — —_ 25 12:0 
Pelecanoides wrinatrix (a), . 4 ‘ 16:25 2 an) 
re ro (b) ean 4 ; 15:0 15 2 
Diomedea exulans, ; : ; 4 121°4 4:0 8 
% brachyura, . 5 ; ; 89:0 2:0 3 
The liver is usually about equilobed, the lobes not being large, and rather triangular 
in shape. In the Albatrosses, however, the right lobe becomes elongated and distinctly 
bigger. The gall-bladder, developed on the right hepatic duct, is always present so far 
as my observations extend. The hepatic ducts (Pl. II. fig. 1, r.d.d., 1.h.d.) open close 
together into the ascending arm of the duodenal loop, close to the pancreatic ones, of 
which there are usually two or three in Majaqueus. In the specimen of Thalasseca 
glacialordes dissected the left hepatic duct divided, soon after leaving the liver, into 
two branches, each of which opened separately into the duodenum, so that altogether 
this received three ducts from the liver. The vitelline rudiment is not to be found in 
the adult birds. The bursa fabricii, in young birds at least, is a well-developed 
large sac, with thick glandular walls, and a small opening into the cloaca. The spleen is 
circular, or nearly so. 
3. Myotoey. 
The myology of the Tubinares presents many features of interest, as will be seen 
from the following description. The species of the group, broadly speaking, resemble 
