1894.] MICROSCOPICAL JOURNAL. 121 



37. Podoeyrtis triacantha. 



38. Dictyopodium eurylophos. 



39. Rhopalocanium ornatum. 



40. Cycladophora hexapleura. 

 4L Lophoconus apiculatus. 



42. Theosyringium tubulus. 



43. Lophocorys acanthocephala. 



44. Stichopilium niacropteruiu. 



45. Artopera loxia. 



46. Dictyomitra articulata. 



47. Kucyrtidium montiparutu. 



48. Liihocampe clava. 



Note. — The authority for the aliove uauies is as follows : 5^o.s. r,, !). •2'.], 

 25, '28, 32, 33, 37, 38, 39, 47,48 were uamed by Ehrenberg ; all the others 

 were by Haeckel. 



LETIERS TO THE EDITOR. 



Note. — T/n's column is open to all correspondents 7v/io zvi itc upon the 

 topics enumerated under " Problems" or -who give other information of 

 interest. The fact that a problem has been anszvertd once need not deter our 

 friends frotn tna king additional comments. To facilitate reference, corre- 

 spondents should cite the number as -veil as the page on -vhich have ap- 

 peared letters and queries to -vhich reference is made. The editor is not 

 responsible for the vieivs of others published in this periodical. 



Blood Corpuscles. — Relative to my article on the measure- 

 ment of blood corpuscles which you have done me the honor to 

 republish in your January number, 1894, I desire to say that 

 ])aper does not reflect m\^ matured judgment upon the question 

 involved My latest views upon the subject formed upon more 

 extended observation, and experience will be found in the Sep- 

 tember number of the Medico-Legal Journal, 1872, published at 

 57 Broadway, New York. M. D. Eavell, M. D. 



Bird Parasites. — I am especially interested in the i)arasites 

 of birds and should like very much tt) see the key to species pro- 

 posed to be published by Prof. Osborn. I use the large-size 

 Beck National Monocular and I am a'so interested in photo- 

 micrography. If I get into the parasites of birds I will send 

 you wjiat I desire to print. R. \V. Shufeldt, U. S. A. 



Tacoma, D. C, March29, 1894. 



The Journal grows in interest and value with each number. 



W. LiGHTON. 



Omaha, Nebraska, March 15, 1894. 



