1862.] PROF. GULLIVER ON THE RED CORPUSCLES, ETC. 91 



111 Terinos taxiles, the lower disco -cellular nervure meets the me- 

 dian uervure a little before the base of its second branch. 



In Terinos teuthras, the lower disco-cellular nervure meets the 

 median nervure at the base of its second branch. 



In Terinos tethys, the lower disco-cellular nervure meets the me- 

 dian nervure a little beyond the base of its second branch. 



3. On the Red Corpuscles of the Blood of Vertebrata, 

 AND on the Zoological Import of the Nucleus, with 

 Plans of their Structure, Form, and Size (on a Uni- 

 form Scale), in many of the different Orders. By 

 George Gulliver, F.R.S., Professor of Comparative 

 Anatomy and Physiology to the Royal College of 

 Surgeons. 



The object of this communication is to give a summary of the 

 value and import of the red corpuscles of the blood as regards sy- 

 stematic zoology, deduced from my observations published, piecemeal, 

 during the last twenty-three years, in the ' Proceedings' of this 

 Society and elsewhere. Such notices will be given of the labours of 

 others in this interesting field, up to the year 1845, as the present 

 confused state of physiological history may seem most to require. 



The drawings now exhibited to the Society are selected from a 

 much larger number in my possession, and are all on the same scale, 

 exhibiting plainly to the eye the relative form and size of the cor- 

 puscles in 171 species of the different classes and orders of the Ver- 

 tebrate subkingdom, and the difference of structure in the corpuscles 

 of the two great divisions of this subkingdom — i. e., 1, Vertebrata 

 apyrencemata, or Mammalia ; 2, Vertebrata pyrencemata, or Ovi- 

 parous Vertebrata. 



Structure of the Corpuscles of Apyrencematous Vertebrates. 



In Man and other Mammalia there are two sets of red corpuscles. 

 The first or temporary set disappears at an early period of intra- 

 uterine life, and is replaced by the second or permanent set. 



The corpuscle of the temporary set is composed of a vesicle in- 

 cluding a nucleus, is larger than the corpuscle of the second set, and 

 is, in short, a cell containing a nucleus. This cell is, both in struc- 

 ture and size, the true analogue of the red corpuscle of oviparous 

 Vertebrata. (See Phil. Mag. for Aug., 1842, p. 107; and my 

 Note to Wagner's Physiology, Lond., 1844, p. 242, fig. 148.) 



The corpuscles of the second set are those which replace the first 

 set, and, subject to waste and supply, are the red corpuscles of the 

 blood from birth, and during the greater part of the period of utero- 

 gestation, until death ; and to these corpuscles the following ob- 

 servations will always be applied, unless otherwise expressed. 



This corpuscle is not homogeneous, but is composed of a colour- 

 less membranous part, with a semifluid or viscid matter in which 



