376 



SCIENCE. 



[N. S. Vol VII. No. 168. 



bryonic pairs of jaws, and he found three 

 pairs of processes, which he so identified. 

 Now I have shown elsewhere that the max- 

 illae are formed of three latei-al parts, each 

 of which may be distinct and has its own 

 range of variation ; and if we assume that 

 the three pairs of processes observed by 

 Dr. Heymons are all maxillary the Hemip- 

 terous mouth becomes quite clear and the 

 attachments of the lancets and the location 

 of the rudimentary maxillary palpi at the 

 base of the beak is normal. 



I have previously expressed my belief 

 that the Rhyngota are not descended from 

 a mandibulate stem and that they separated 

 from the archetypal form before the mouth 

 structures were definitely formed anywhere. 

 They were emandibulata from the start, 

 and as such are now equivalent in rank to 

 all the other orders of insects (excluding 

 Thrips) combined. "Nov was any labial 

 structure ever developed in this order, and 

 all trace of such is now lost, in the adult 

 at least. 



If we study Dr. Heymons' paper in the 

 light of these suggestions it is the most im- 

 portant contribution to our knowledge of 

 the mouth parts of the Ehyngota that has 

 recently appeared. 



John B. Smith. 



Rutgers College, 

 New Brunswick, N. J. 



THOMAS JEFFEBY PARKER.-^ 

 Thomas Jeffeey Parker, who died at 

 "Warrington, ISTew Zealand, on E'ovember 

 7, 1897, was the eldest son of the late Wil- 

 liam Kitchen Parker, F.K.S., the world- 

 renowned comparative osteologist. He was 

 born in the S. W. district of London on 

 October 17, 1850, and educated there, and 

 his scientific training was received at the 

 Royal School of Mines during the years 

 1868-1871. 'Leaving that institution with 

 distinction, Parker became science master at 

 *FrO!n the Anatomiacher Anzeiger. 



the Bramham College, Yorkshire ; and Mr. 

 W. B. Lockwood, now assistant surgeon at 

 Bartholomew's Hospital, London, may be 

 named, as an anatomist who in his school- 

 boy days came under his influence. In 

 1872, at the special request of Huxley, Par- 

 ker returned to London, to fill the office of 

 demonstrator of biology at the then newly 

 established Science College at South Ken- 

 sington, now known as the E-oyal College 

 of Science, London, and he held the post 

 until his appointment, in 1880, to the pro- 

 fessorship of biology at the University of 

 Otago, Dunedin, New Zealand. As a teacher 

 Parker will remain memorable in associa- 

 tion with the development of the now 

 universally adopted Huxleian method of 

 laboratory instruction in biology, known 

 and recognized throughout the world as the 

 ' type system,' which marked the introduc- 

 tion of rational methods into the teaching 

 of biological science. So earnestly did 

 Parker enter into the task of development 

 of this under his great master that he early 

 became the means of effecting conspicuous 

 changes in its methods, and he will be re- 

 membered in history as the man to whom 

 were mainly due its progress beyond 

 the experimental stage and the founda- 

 tion, in connection with it, of the first 

 teaching-collection of specimens and illus- 

 trative anatomical drawings based upon 

 it — the prototype of all since established in 

 various parts of the world. 



Among Parker's published works there 

 stands conspicuous his ' Zootomy,' a didac- 

 tic laboratory treatise, and his ' Lessons in 

 Elementary Biology,' now translated into 

 German, a book for the study and the fire- 

 side. Both take high rank'among scientific 

 manuals in the English language and both 

 were the direct outcome of his connection 

 with Huxley and his educational work, 

 and the last-named takes rank as the 

 most important treatise for the elemen- 

 tary student that has appeared since 



