CONSTITUTION OF GLYCOCOLL AND ITS DERIVATIVES. 1()7 



least, as probable as that of new asparagins. Time will sliow wlietlier 

 these predictions are verißed or not by actual facts. 



Returniiii^ to the cjiiestion of nomenclature, the generic name 

 taurins should be used in the case of the so-called amido-sulpli(jnic 

 acids, and different taurins distinguished by prefixing the names of 

 the divalent hydrocarbon radicals. Thus, " ^?-amido-ethyl sulphonic 

 acid," or " amido-isethionic acid," terms which are intended to express 

 the constitution of common taurin, should be replaced by ethiilene-laurin 

 (or simply, taurin) in accordance with the formula, 



H.C-XH.K 



'I >. 



tL,C - so/ 



The "^5-methyl taurin" and the " ^5'-j^-dimethyl taurin," described by 

 Gabriel (Ikr.^ 22, 2988 [1889]), would be respectively propijlene-taurin 

 and vietlujl propulene-taunn, and expressed by the frrmulae, 



H.,C-NH3. H.C - XH.,(C H3) 



I >0 and I \() . 



CH3.HC-SO/ CH3.HC-S0,/"^ ' 



TN'hilst the " y-amido-propyl sulphonic acid " (Gabriel and Lauer : 

 Ber., 23, 92 [1890]) should be named triiiit'tJnjh'nc-taurin, and express- 

 ed by the formuln, 



im,-so/ 



CH,< >o 



The above examples would, I hope, suffice to show that the nomen- 

 clature of the " amido-acids " here suggested is capable of general 

 application. 



I have nuich pleasure, in conclusion, in tendering my best thanks 

 to Dr. E. Divers, F.R.S., for kindly looking over this paper. 



