On the Reproduction o/'Euglypha alveolata, Duj. 27 



American ? So far as I am aware these still remain to be 

 discovered. 



When, however, Mr. Boulenger asserts [l. c. p. 346) that 

 " A list of the lizards of any northern district of the United 

 States would equally well support my [Boulenger's] view," 

 I can but say that this statement so far traverses beyond the 

 facts that it can only be met with a most emphatic denial. In 

 the whole of the United States east of a north and south line 

 connecting the mouth of the Rio Grande with Canada, or 

 over an area of approximately 1,500,000 square miles, there is 

 scarcely a single lizard which has any Neotropical affinities 

 whatever, and still less so in any northern section of this area. 



In the fact that some four or five species of lizards, of a some- 

 what southern type {Sceloporus, Phrynosoma), range as far 

 north as British Columbia there is about as much reason for 

 uniting the North- and South-American Lacertilian faunas as 

 there is for uniting the equivalent bird-faunas because along 

 the same limited tract several species of humming-birds range 

 deep into Canada (and Alaska!), or because a parrot and the 

 scarlet tanager (&c.) are found in the eastern and southern 

 United States. Similarly we might unite the northern and 

 southern mammalian faunas on the equally obvious ground 

 that the couguar, skunk, and bear range deep into South 

 America, and, conversely, the peccary, opossum, &c. far into 

 North America. 



VI. — Contributions to the Knowledge of the Heproduction of 

 Euglypha alveolata, Buj. By l3r. F. Blochmann *. 



[Plate IV.] 



In the glasses with mud from the two basins in the garden 

 of the Schwetzinger Schloss, in which I formerly detected 

 Hcematococcus Biitschlii, the Euglyp)hce, which were at first 

 not very numerous, increased considerably. This induced 

 me to seek for divisional stages, which also occurred in abun- 

 dance. Mr. SchewiakoiF undertook to submit the more deli- 

 cate processes in the division, especially that of the nucleus, 

 to a thorough investigation, and his memoir upon this subject 

 will appear shortly. For my own part I made an observa- 



♦ Translated by W. S. Dallas, F.L.S., from the ' Morphologisches 

 Jahrbuch,' Band xiii. pp. 173-183 (^1887;. 



