Charles-Sedgwick Minot 357 



Division 2. Compound Glands {organic or true compound glands). 

 Type a, ductless epithelial branching {with capillary circulation). 



1. Ectodermal. . 



Salivaries, tear gland, Harderian. 

 Mammary glands. 



2. Entodermal. 

 Pancreas. 



3. Mesothelial. 



Appendicular glands of the urogenital system. 

 Type b, anastomosing {with sinusoidal circulation). 



1. Liver. 



2. Paraphysis (in Necturus). 



Type c, ductless epithelial {with secondary ohliteration of duct). 



1. Thyroid. 



2. Hypophysal gland. 



3. Infundibular gland. 



4. Pineal {epiphysis). 



Class C. False Glands, never developed with ducts. 



Division 1. Epithelioid glands {exclusively entodermal?) 



1. Parathyroid. 



2. Carotid. 



3. Thymus (cf. below) (?). 



Division 2. Mesenchymal ductless glands. 



1. Suprarenal cortex. 



2. Coccygeal gland and other chromaffinic cell organs. 



3. Interstitial cells of genital glands (?). 



Division 3. Cytogenic glands. 



a. Lymphseal structures. 



1. Lymph glands and follicles (tonsil?). 



2. H^molymph glands. 



3. Spleen. 



4. Thymus (?). 



b. Sanguifactive organs. 



1. Bone marrow. 



c. Genital glands. 



1. Ovary. 



2. Testis. 



I should like to include, in passing, reference to another general 

 anatomical conception which, though not based strictly on embryological 

 results, may be appropriately mentioned. I mean that unit of adult or- 

 ganization, which is sometimes referred to as the " lolule," but, as this 

 term is somewhat confusing owing to the manifold meanings assigned to 

 it, I venture to express the hope that the term '' structural unit " will be 



