168 PROF. G. B. HOWES ON HAPALE JACCHUS. [Feb. 1 1, 



black iull-erested pileuiu, the lower parts, sides of head (below 

 eyes), nuchal collar, lores, and frontlet white. 



Xexopsaris ALBi:jfuc'HA. (Plate VII.) 



Pacini rhamphus albiniicha, Burin. P. ZS. 1868, p. 635; Scl. et 

 Huds. Arg. Orn. ii. p. 222. 



Xenopsaris albinucha, Eidgw. Bull. II. IS. N. Mus. xiv. p. 470 

 (Oct. 22, 1891). 



Prospoietus alhinuchus. Cab. Bericht orn. Gesellsch. Berlin, 

 Bericht ix. p. 4 (Nov. 30, 1891) ; id. J. f. O. 1892, p. 126. 



Entire pileum (except narrow frontal band) down to the middle 

 of the e^'es glossy black, with a slight bluish lustre ; narrow frontal 

 band (including nasal tufts), lores, suborbital region, ear-coverts, 

 and entii-e under portion of head, neck, and body, white; a rather 

 narrow greyish-white nuchal collar (immediately below the black 

 pileum) ; hind neck and back uniform ash-grey ; the secondaries 

 and rump similar, but browner ; wings, tail, and upper tail-coverts 

 greyish brown, the wing-coverts narrowly and indistinctly margined 

 with whitish, the tertials distinctly edged with white ; tail darker 

 than wings, especially towards the end, the shafts pale brown 

 basally ; outer tail-feather broadly edged and margined round end 

 with white. Upper mandible black, lower greyish ; feet dusky 

 in dried skiu. 



Whole length 5*0 inches, wing 2-4, tail 2'3, tarsus 0-5. 



Hah. Sedge-beds on the shores of the Eio de la Plata, near Buenos 

 Ayres {Barm.). 



February 14, 1893. 

 OsBEET SAtviN, Esq., F.E.S., Vice-President, in the Chair. 



The Secretary read the following report on the additions to the 

 Society's Menagerie during the mouth of January 1893 : — 



The total number of registered additions to the Society's 

 Menagerie during the month of January was 104, of which 31 

 \\ere by presentation, 3 by exchange, 62 by purchase, 3 by birth, 

 and 5 on deposit. The total number of departures during the 

 same period, by death and removals, was 122. 



Prof. G. B. Howes, F.Z.S., exhibited an abnormal sternum of the 

 Common Marmoset {HapaU jacchus), and made the following 

 remarks thereon : — The specimen w&s obtained from one of six 

 adult skeletons ' recently macerated. The mesosternum consisted 

 of five pairs of ossific elements, the anterior foiu* of which were 

 repetitioually symmetrical, but disposed alternately, instead of side 

 by side as is most generally the case with the Mammalia. The 

 fifth pair were comparatively insignificant and altogether invisible 



' All epiphyses united. 



