152 DR. K. W. VERHOEFF ON BRACHYCHAETEUMA, 



description of it is very incomplete ; but his fig. 4 apparently 

 represents posterior gonopods, and in that case points rather 

 to a relationship with the Anthroleucosomidae than with 

 Brachychaeteuma. In general appearance Haase's animal is 

 distinguished by " light reddish brown " coloration and strong 

 dorsal bristles, and is therefore unlike B. bagnalli. 



Titanosoma jurassicum Verh. 

 In the " Zoologischer Anzeiger," 1910, nos. 6 and 7, in my 

 forty-second paper on Diplopods, "Neue Polydesmiden aus 

 Mitteleuropa und ihre Verwandten," I described amongst 

 others, on pages 142-144, the new genus Titanosoma, based 

 upon a representative of the Polydesmoidea discovered near 

 Kehlheim in the valley of the Danube. In the summer of 

 191 1 I received from Mr. R. S. Bagnall a series of very small 

 Polydesmids which he had collected in the Wear Valley in the 

 North of England. These occurred in some numbers near 

 Fencehouses, Co. Durham, in a restricted area in an old 

 wooded dene opening into the river Wear. Since then single 

 examples have been taken by the same captor on the Wear 

 banks near Penshaw, and at Gibside in the Derwent Valley, 

 all in the county of Durham. 1 



It appears that we have here once more to do with a 

 Diplopod with parthenogenetic reproduction, like several 

 others which, as is well known, we have become acquainted 

 with in recent years. In addition to ten larvae in different 

 stages, there were about thirty females with nineteen 

 abdominal segments, but not a single male nor any larvas of 

 males. In these females with nineteen segments I have like- 

 wise not detected vulvas. These English specimens agree so 

 completely with my type from the Danube district that I am 

 unable to point out the slightest distinction between them. 



In completion of my previous description, for which I had 



1 Later records sent by Mr. Bagnall : one female in garden, Penshaw, 

 and a few in garden at Oxford, including a young example of the male. 



