In the light of what we now know concerning latent neurosyphilis, it would seem well for patients to be followed from time to time with the W. R. on blood and spinal fluid after the supposed completion of the treatment of primary and secondary syphilis. The examination of the spinal fluid is not superfluous, as our experience with the so-called _paresis sine paresi_ abundantly shows. At the present day it is not good practice to assure a patient that he is cured after two years of ordinary mercurial treatment without resort to frequent spinal fluid tests, even though the serum W. R. be negative. =TABETIC NEUROSYPHILIS (“tabes dorsalis”) is often quite ATYPICAL clinically and may even show no single symptom warranting the old clinical name “locomotor ataxia.”= =Case 30.= Stephen Green is a case of TABES DORSALIS with active knee-jerks and without locomotor or muscle-sense disorder. When observed at the age of 45, it appeared that there were but two complaints: lack of control of the vesical sphincter and shooting pains in the legs. It appeared that the urinary disorder dated back ten years, when there had been difficulty in passing the urine. Sounds had been passed at the time; occasionally there had been incontinence during after years, ascribed by Mr. Green to the passing of the sound. However, the physician at that time stated that the incontinence was a symptom of tabes dorsalis. The incontinence had recently become worse, especially marked at night, though also occurring in the day; much worse during excitement, and very much worse after taking alcoholic drinks. Besides incontinence, there is also difficulty at times in passing the urine, as well as dysuria. As for the pains in the legs, they had been first noticed some three or four years ago and considered to be mild rheumatic effects. Now, however, they have grown progressively worse and have been the effective cause of giving up business. The pains are sharp, darting, pinching, and burning, and last, say, about a second with an interval of about the same length. The attack will continue sometimes for many hours. There is a strabismus of the left eye, ascribed by the patient to an accident with an umbrella (there had been operation without relief). The pupils showed the Argyll-Robertson effect and were markedly irregular. Despite the divergent strabismus with diplopia, the eye movements were well performed although not in parallel axes. Ankle-jerks could not be obtained even on reinforcement, but the knee-jerks were lively, and the other deep and skin reflexes proved normal. The blood and spinal fluid tests were characteristic of tabes dorsalis.