#Head and Neck.#--_The anterior auricular (parotid and pre-auricular) glands_ lie beneath the parotid fascia in front of the ear, and some are partly embedded in the substance of the parotid gland; they drain the parts about the temple, cheek, eyelids, and auricle, and are frequently the seat of tuberculous disease. _The occipital gland_, situated over the origin of the trapezius from the superior curved line, drains the top and back of the head; it is rarely infected. _The posterior auricular (mastoid) glands_ lie over the mastoid process, and drain the side of the head and auricle. These three groups pour their lymph into the superficial cervical glands. _The submaxillary_--two to six in number--lie along the lower order of the mandible from the symphysis to the angle, the posterior ones (paramandibular) being closely connected with the submaxillary salivary gland. They receive lymph from the face, lips, floor of the mouth, gums, teeth, anterior part of tongue, and the alæ nasi, and from the pre-auricular glands. The lymph passes from them into the deeper cervical glands. They are frequently infected with tubercle, with epithelioma which has spread to them from the mouth, and also with pyogenic organisms. _The submental glands_ lie in or close to the median line between the anterior bellies of the digastric muscles, and receive lymph from the lips. It is rare for them to be the seat of tubercle, but in epithelioma of the lower lip and floor of the mouth they are infected at an early stage of the disease. _The supra-hyoid gland_ lies a little farther back, immediately above the hyoid bone, and receives lymph from the tongue. _The superficial cervical (external jugular) glands_, when present, lie along the external jugular vein, and receives lymph from the occipital and auricular glands and from the auricle. _The sterno-mastoid glands_--glandulæ concatinatæ--form a chain along the posterior edge of the sterno-mastoid muscle, some of them lying beneath the muscle. They are commonly enlarged in secondary syphilis. _The superior deep cervical (internal jugular) glands_--from six to twenty in number--form a continuous chain along the internal jugular vein, beneath the sterno-mastoid muscle. They drain the various groups of glands which lie nearer the surface, also the interior of the skull, the larynx, trachea, thyreoid, and lower part of the pharynx, and pour their lymph into the main trunks at the root of the neck. Belonging to this group is one large gland (the tonsillar gland) which lies behind the posterior belly of the digastric, and rests in the angle between the internal jugular and common facial veins. It is commonly enlarged in affections of the tonsil and posterior part of the tongue. In the same group are three or four glands which lie entirely under cover of the upper end of the sterno-mastoid muscle, and surround the accessory nerve before it perforates the muscle. The deep cervical glands are commonly infected by