[cooper] HAPLOBOTHRIUM GLOBULIFORME 3 



division is merely a secondary one due to the distension of perhaps 

 the most distal coil of a "Rosettenform" condition. This is, however, 

 not the case, as will be seen by reference to the more detailed descrip- 

 tion of the species, where it is emphatically stated that the two divi- 

 sions are quite distinct from the earliest stages, i.e., soon after they 

 are differentiated from the anlage. In fact the uterine tube opens 

 into the postero-dorsal region of the sac immediately above the 

 temporary uterine-opening by a distinct aperture, which relations hold 

 for adult and gravid conditions of the organ in spite of the thin walls 

 and consequent difficulty in following the structures in serial sections. 

 As regards the fact that the cirrus is armed with minute spines or 

 short bristles, this species would seem to be related to the Amphitreti- 

 dae Luehe; however, apart from the resemblance between the minute 

 deeply-staining granules, to which the spines seem to be related, 

 and the heads of the spines in the latter family (Luehe '02, p. 330) it 

 is widely separated from this somewhat isolated group of genera. 

 Thus the uterus is the only organ the division of which, into two dis- 

 tinct portions, would seem to exclude it from the Dibothriocephalidae 

 and place it among the genera of the Ptychobothriidae, Luehe. Luehe, 

 by the way, does not emphasize his statement that the: "Uterus nie 

 die sogenannte Rosettenform annehmend, wohl aber in der Regel 

 eine gerâumige Uterushôhle bildend, welche die iibrige Genitalorgane, 

 ohne dass freilich deren Rùckbildung eintritt, buchstâblich an die 

 Wand drângen kann, in dem die ganze Proglottis in reifen Proglottiden 

 vielfach als ein einziger sackfôrmiger Eibehâlter mit verhâltnismâssig 

 sehr diinnen Wandung erscheint," doubtless since in the genera 

 Ptychobothrium Lonnbg. and Taphrobothrium Luehe the uterus is 

 only a long winding canal without an enlarged cavity. As a matter 

 of fact the whole question of the division of the uterus into distinct 

 regions is one concerning which we cannot come to any definite 

 conclusions since, to my knowledge, there is no adequate description 

 of the developmental relationships between the uterine tube and the 

 uterine sac in those genera in which they appear. This is quite applic- 

 able to the genus Triaenophorus, in the adult joints of which a sort of 

 uterine sac appears, since Schmidt ('88) says only that: "das stumpfe, 

 abgerundete Ende (of the uterus) steht mit dem Eileiter in verbindung, 

 wâhrend das Spitze der Aussenflache des Kôrpers zuwuchert." 



Consequently, it is perhaps advisable to place Haplobothrium at 

 least temporarily in the family Dibothriocephalidae Luehe. 



The scolex is closely related to the genera of the sub-family 

 Triaenophorinae Luehe, 1899, in that it is provided with a terminal 

 disc ("Scheitelplatte") armed with very small spines comparable to 

 the variable spines on the same structure in Ancistrocephalus micro- 



