Further Observations on Koeneuia. 403 



as Ha^'sen & SöKENSEN. Dl". Wheeler most kindly read and made 

 many valuable correctious on my paper before it went to press and 

 he saw no intended slur in the above lines; yet Dr. Hansen says 

 "Tliis mode of writing is. speaking- gently, ratlier bold". Truly one 

 is thankful that the gentleman restrained himself and only spoke 

 "gently". Dr. Hansen certainly misunderstood my thought. or rather 

 my English, for he adds "Bnt if I shonld obtain new material with 

 males and females of K. mirabilis (or any other of my species), I 

 think to be able to distinguish the sexes." 



However, from the very outset of Drs. Hansen's & Sörensen's 

 paper I was so convinced that they had individuals of one sex only 

 that I have kept a tabulated account of the sex of the individnals 

 taken around Austin, thinking that I might, since material was more 

 accessible to nie, find that the males and females appeared at dif- 

 ferent times . which wonld explain the failure of the European col- 

 lectors to find the males of these small creatui-es. 



Dr. Hansen's criticism on points relating to the external 

 anatomy need not be dAvelt on at all since they will be taken up 

 later, having been revised and corrected after diligent observations 

 on a considerable amount of material. He goes further, however, 

 and touches on the internal anatomy of this form on which he has not 

 given any study as yet, and says, "In flg. 5, she has drawn 4 pairs of 

 dorso-ventral muscles; without dissection I have been able to dis- 

 cern five pairs in K. wheeleri (which has three pairs of sacs)". If 

 fig. 5 did not show all the five muscles, fig. 6 does, which is a 

 drawing through the same region of the male; but fig. 5 does show 

 all five muscles as any one can see who cares to take the trouble 

 to look. Furthermore, on p. 629 of my reprint it is stated "Just 

 as there is a pair of dorso-ventral muscles for each pair of lung- 

 sacs (there are three pairs of sacs) there is also a corresponding 

 pair for the reproductive appendages of each segment". 



In regard to the digestive tract, Dr. Hansen writes, presumedly 

 in great haste, "Miss E. mentions a pair of small diverticula from 

 the thoracic and five pairs of large diverticula from the abdominal 

 part of the intestine, and furthermore she writes: 'The intestine 

 and the diverticula are invariably filled with food particles, which 

 have the appearences of yolk granules'. Dr. Sörensen has asked 

 me to State that at least as to the diverticula in the abdomen this 

 is certainly incorrect (and I share bis opinion). In his extensive 

 treatise on the anatomy of OpDiones Laniatores [in : Xaturh. Tidsskr., 



