240 Miscellaneous. 



without any appearance of a ventral sole. Its favourite position is 

 floating rather below the surface of the water, back downwards and 

 with the edges of the mantle expanded nearly horizontally, and 

 attached to the glass by the under surface of the tip of its tail, or 

 to the side of the vase with its head towards the surface of the water. 

 If the vase is moved or otherwise shaken, the animal contracts its 

 mantle over the back, and descends head foremost, as it were drop- 

 ping down to the bottom, leaving a mucous filament attached to the 

 glass ; and it ascends by this filament, apparently eating it as its 

 head rises towards the surface, and at length becomes attached as 

 before by its subcaudal sole. 



The dark-green colour is produced by minute internal granules 

 which vary in the intensity and in the shade of their colour, some 

 being dark olive and others reddish brown. The margin of the 

 mantle is white in all the specimens I have seen. 



Description of a new Species of Taenia. 

 By W. Baird, M.D., F.L.S. 



TAENIA SULCICEPS. 



Caput tetragonum, magnum, acetabulis anticis lateralibus, orbi- 

 ct'laribus, longe segregatis, sulco interposito. Proboscis nulla. 

 Os terminate inerme. Collum longum, Iceve. Articuli supremi 

 breviores ; deincle longiores, infundibuliformes, angusti ; late- 

 ribus undulatis, crenatis. Apertures genitales marginales, uni- 

 laterales. 



Hab. In intestinis Diomedece exulantis. 



Longitudo exemplorum in possessione nostra, quae sunt fragmenta 

 solum, uncise tredecim. 



In Museo Britannico. 



The colour of this Tape-worm is a straw-yellow. The head is 

 tetragonal in shape, large ; and the neck is long, measuring nearly 

 two or three lines, and quite smooth. Upon minute inspection, I 

 could discover no trace of a proboscis ; and the mouth was destitute 

 of hooks of any kind. The joints of the body are small at first, be- 

 coming larger as they descend ; but even when full-grown are narrow, 

 somewhat undulated on the margin, and slightly but irregularly 

 crenated. The suckers on the head are of considerable size, round 

 in shape, and are separated from each other by a rather deep fur- 

 row. The genital orifices are situated on the lower margin of each 

 joint, and are all on the same side. None of the specimens are quite 

 perfect ; but there are two or three fragments, each about 1 3 inches 

 in length. 



This Tapeworm was taken by Mr. Edward Gerrard of the British 

 Museum, from the intestines of the Albatros (Diomedea exulans), 

 and is now in the collection of Entozoa in the British Museum. — 

 Proc. Zool. Soc. Feb. 22, 1859. 



