136 



Scientific Proceedings (53). 



It was supposed that the skeletal structures united in the same 

 manner as the archentera. The evidence furnished by Toxo- 

 pneustes however clearly shows that in this species at least no 

 fusion of the skeletal parts occurred. Instead some very interest- 

 ing changes took place which may be stated briefly as follows: 

 One of the pair of fused larva? developed normally in every detail, 

 the other developed in nearly every instance, incompletely. An 

 almost perfect series of fused larva? were obtained in which the 

 incomplete pluteus lacked more and more of the characteristic 

 parts that constitute the perfect larval skeleton; and the order 

 of their disappearance was in the reverse order of their appear- 

 ance in ontogeny. 



The union of the two larvae involved the approximation of their 

 branched and complex skeletons, whose parts frequently over- 

 lapped but never fused. 



89 (785) 



Metabolism studies in a case of myotonia atrophica. 



By Jacob Rosenbloom and Benson A. Cohoe. 



[From the St. Francis Hospital, and the Laboratory of Biochemistry 

 of the University of Pittsburgh, Pittsburgh, Pa.] 

 In a thirteen day metabolism study on an individual suffering 

 from myotonia atrophica, we have studied the nitrogen metab- 

 olism, and urinary nitrogen partition, the sulphur metabolism 

 and urinary sulphur partition, and the calcium, magnesium, 

 phosphorous, chlorine and fat metabolism. The creatinine excre- 

 tion was normal. The only striking metabolic anomaly noted in 

 this study was the marked loss of calcium. 



90 (786) 



Sugar from lactic acid in human diabetes. 



By Nellis B. Foster, M.D. 



[From the Medical Service of The New York Hospital.] 

 The evidence presented by experimental diabetes seems to 

 indicate that in the transformation of amino-acids into glucose 

 lactic acid is an intermediary step. It has also been suggested 



