34 C. W. M. Poynter 
typical of the class; I will describe it here both to report the 
case and to illustrate the type. 
Specimen is from a man 62 years old who died of Bright’s disease; he 
did not suffer from dysphalgia luxoria and was not left-handed. Fig. 25 
was drawn from the dissection. 
The heart was normal, the aortic arch was normal in position and size, 
it gave off first the right common carotid, the left common carotid, the 
left subclavian and last the right subclavian. The latter vessel arose from 
the right dorsal aspect of the aorta opposite the juncture of the bodies 
of the third and fourth dorsal vertebre, passed behind the cesophagus 
upward, describing a slight curve with the convexity to the left, to reach 
its usual position in relation to the scalenus anticus muscle. The right 
vertebral artery, which was the first branch given off, had the usual rela- 
tions and entered the sixth costo-transverse foramen. The ligamentum 
arteriosum was normal and was attached to the aorta Bote 3 cm. above 
the origin of the right subclavian. 
The recurrent laryngeal nerve on the right was given off in the neck 
and passed almost directly across to the trachea without making any 
downward loop. The thoracic duct divided into two trunks, of which the 
right was slightly the larger, opposite the fifth dorsal vertebra and emptied 
into the venous angle on both the right and left sides. There were no 
other anomalies observed in the entire body. 
There are seven similar cases in the Warren Museum, which I exam- 
ined and which, I believe, have not been reported. In two of these there 
is a definite dilation at the point where the subclavian leaves the aorta; 
the other cases are in no wise remarkable and all are without history. 
Cases of this type are most numerous, see figs. 39 and 41, and 
present a simple developmental disturbance which is entirely com- 
pensated for and consequently works no ill to the individual. I. 
have been able to collect the following cases, referring freely to 
Holzapfel’s (1899) splendid work: 
Hommel (1737), Cassebohm (Bohmer 1741), Hoffmann (1751), Mieg 
(1753), Loseke (1754), Ludwig (1764), Schleitz (Ref. Murray 1768), Erd- 
mann (1772), Sandifort (1772), Pohl (1773), Walter (1785), Cruickshank 
(1789), Hulme (1789), Valentin (1791), Sandifort (1793), Isenflamm 
(1800), Meckel (1805) 4 cases, Autenrieth & Pfleiderer (1806) 2 cases, 
Koberwein (1810), Zagorsky (1810), Isenflamm & Fleischmann (1815), 
Meckel (1816) 3 cases, Otto (1816), Kirby (1818), Colles (1820) 4 cases, 
Meckel (1820) 2 cases, Tiedemann (1822), Stedman (1823), Godman 
(1824), Hesselbach (1824), Hart (1826), Cerutti (1827), Mayer (1827), 
Wagner (1828) 2 cases, Weber (1829) 2 cases, Green (1830) 3 cases, 
Hopkinson* (1830), Lauth (1830), Otto (1830) 6 cases, Cruveilhier & 
262 
