Zoological Society. 57 



hitherto examined of any bird, as may be seen by reference to the 

 copious tables of my measurements of the blood-corpuscles of Verte- 

 brata, in the 'Proceedings of the Zoological Society/ October 14, 

 1845. The long diameter of the corpuscles of Rallus Philippinensis 

 is 1-209 7th of an inch, and not 1 -2997th, as there printed. In my 

 observations in this class, those great birds the Ostrich and the Java- 

 nese Cassowary were found to have the largest blood- corpu scles ; 

 while the smallest corpuscles occurred in the little insectivorous and 

 granivorous birds. The average length of the corpuscles of the Cas- 

 sowary was 1- 1455th and their breadth 1 -2800th of an inch. 



These remarks all refer to the red corpuscles ; and the measure- 

 ments of them in the following notes by Dr. Davy are, like all my 

 measurements, in vulgar fractions of an English inch. — G. G. 



Torpedo oculata. — Blood from heart : long diameter of the corpus- 

 cles about 1-800; short diameter 1-1000. Some further particulars 

 have been given respecting them in a paper deposited in the archives 

 of the Royal Society. 



Spigota (Perca marina). — Blood from vessels of gills: long dia- 

 meter of corpuscles from 1-4000 to 1-3750 ; short diameter 1-4000. 



Pylamedes {Thynnus Pylamedes). — Long diameter of corpuscles 

 about 1-2000; short diameter about 1-3000. 



A small species of Mackerel, corpuscles 1-2286 by 1-4000. Taken 

 from the heart ; oil particles four times as large were mixed with the 

 red particles. 



A small fish ; species of it I have not yet made out; corpuscles about 

 1-4000 to 1-3000, by about 1-6000. 



Another species I have not yet made out; particles about 1-3000 

 by 1-4000. 



Another small species, not made out ; particles, most of them cir- 

 cular, about 1-4000 ; a few elliptical. 



Sword-fish. — Particles, long diameter, from 1-2000 to 1-3200; 

 short diameter, 1-3200 to 1-5333. 



Red Mullet. — Many particles circular, about 1-4000; some ellip- 

 tical, about 1-2286 by 1-3200. 



John Dory. — Corpuscles 1-1777 by 1-2666 ; some nearly circular. 



A species of large Mackerel; corpuscles about 1-2000 to 1-2666, 

 by about 1-4000. 



Small spotted Dog-fish. — Corpuscles about 1-1333 by 1-2000. 

 ' Sturgeon. — Corpuscles about 1-1600 by 1-2666. 



Squalus acanthias. — Corpuscles about 1-1231 by 1-1777; nucleus 

 elliptical. 



Brown spotted Dog-fish. — Corpuscles from 1-1000 to 1-1143, by 

 1-1600 to 1-1455. 



Tunny (Thynnus communis). — Corpuscles 1-1600 by 1-2666. 



Eel, species I have not made out; corpuscles about 1-2000 by 

 1-3200 ; a few circular. 



A species of small fish I have not yet made out ; corpuscles about 

 1-2666 by 1-4000. 



A specjes of Scyllium, a cartilaginous fish, probably a new species. 

 I have sent a specimen to Chatham. Corpuscles about 1-1000 by 

 1-2000. 



