MORPHOLOGY OP BATHYNELLA AND ALLIED CRUSTACEA. 493 
bearing a group of spines and long setae (Text-figs. 4 and 5). 
These appendages are not divided into two segments as 
Vejdovsky described them, and one of the grounds for my 
suggestion that they might represent the caudal furca is 
therefore removed. 1 am now inclined to agree with 
Text-fig. 3. 
Bathynella natans, $ . Head and anterior thoracic somites, 
dorsal view. a'. Base of antennule. m. gr. Mandibular 
groove. I, II. First and second thoracic somites. 
Chappuis that they represent the two halves of a deeply 
divided telson, although I do not understand his argument 
when he says — “ Da aber das Analsegment hier schon die 
Uropoden tragt, so ist die Deutung der 2 Scliwanzplatten als 
Furcalglieder ausgeschlossen.” In no other Syncarida does 
the telson show even a tendency to division, and although in 
