143 



with the form of the inferior mandible. The lower part of the trun- 

 cated surface is produced in a pointed form, and is supported beneath 

 by a small horny plate. The whole length of the tongue is 3 inches;" 

 its circumference 24 inches. Along the middle of the flattened su- 

 perior surface there is a moderately deep and wide longitudinal furrow, 

 on either side of which there are from twenty to twenty-five recurved 

 spines, but of a soft and yielding horny texture, measuring from 1 to 3 

 lines in length. These spines are arranged in an irregular alternate 

 series : the outer ones being the smallest; and these, indeed, may be 

 considered a distinct row. At the posterior part of the tongue there are 

 two groups of smaller recumbent spines directed towards the glottis. 

 The substance of the tongue is not muscular, but is chiefly composed 

 of an abundant yielding cellular substance with fat of an almost oily 

 consistence. It is supported by a long and thin concave cartilage, 

 articulated to the body of the os liyuides by a shallow ginglymoid joint, 

 allowing of a free motion. Excepting the straight hi/o-glossi, the 

 muscles all terminate at the base of the tongue. The tendons of the 

 former muscles run along the under part of the lingual cartilage, and 

 expand to be inserted at its extremity, where a few fibres again 

 proceed forwards to the extreme point of the tongue. 



"No Entozoa were met with in the specimen dissected by me : 

 but Col. Sykes has been so obliging as to permit me to examine the 

 tapetvorms, before alluded to, which he found blocking up the duo- 

 denum of the Flamingo dissected by him in Dukhun. 



" One of the specimens, together with a drawing of it, is now on the 

 table. From the marginal disposition of the lemnixci and its general 

 habit, it evidently appertains to the true TcpnicB, and from the struc- 

 ture of the head ranks among the rostellate species with an armed 

 proboscis. It does not accord with any of those described in the ' Sy- 

 nopsis Entozoorum' of Rudolphi, and is of so peculiar a form that I 

 feel no hesitation in characterizing it as follows. 



" T^NiA LA.MELLiGEKA. Tceii. incrassato, capite suhgloboso ; rostello 

 cylindrico obtuso ; collo nullo; articulis brevissiniis, marginibus 

 lateralibus dilatatis, rotundatis, utrinqiie pariim extantibus ; super- 

 Jicie utrdque lined longitudinali leviter impressd ; lemniscis latera- 

 libus oppositis. 



"Longitude corporis, 7 unc. ; latitude, 5 lin.j crassities, I lin. 



"The segments are extremely numerous and short: they gradually 

 increase in breadth and thickness for about 3 inches from the head ; 

 as they approach the opposite end of the body they slightly diminish 

 in breadth, while they increase a little in length, but retain the same 

 thickness. Along the middle of both the plane surfaces of the body 

 the segments are separated by shallow indentations, and it is only 

 towards the posterior extremity that the segments appear to overlap 

 each other from before backvv'ards ; but at the sides of the body the 

 posterior margins of the segments project abruptly from the surface 

 and form a series of semicircular ridges, commencing on both sides of 

 the body about a line's distance from the margin. On both margins 

 of each segment immediately anterior to these ridges there is a small 

 pyramidal eminence, perforated at the apex, through which perforation 



