348 C. T. HUDSON. 



Dr. Bartsch's Classification. 



Dr. Bartsch, in his first publication of his system in 1870, 

 divided all the Botifers into the Enterodela (with stomach, 

 intestine, and anus) and the Gasterodela (without intestine 

 or anus) ; and in this latter was one family formed for one 

 genus Ascomorpha (Gosse's Sacculus); all the rest of the 

 Botifers were in the first division. 



In his second publication, ' Botatoria Hiingariae,' he aban- 

 doned this primary division, and simply arranged the Botifers 

 in six families, as follows : 



1. Floscularinse. 



2. Philodinsea. 



3. Hydatinsea. 



4. Longisetse. 



5. Scaridina. 



6. Loricata. 



Of these 1, 2, and 6 are natural, though 1 is made to contain 

 Floscularia (fig. 11) and Stephanoceros (fig. 10) along with the 

 Melicertans ; and the first two differ too much from the last to 

 be so placed. 



Family 3 ranks together Hydatina (fig. 1), Synchseta 

 (fig. 3), Asplanchna (fig. 2), and Lindia; four forms that 

 ought to be in separate families : while family 4 connects the 

 dissimilar genera Triarthra (fig. 8), Mastigocerca, Poly- 

 arthra, and Furcularia. 



This system is much on a par with Leydig's, but the publi- 

 cation in which it occurs contains plates which though coarse 

 are well worth attentive study, I can say nothing of the text, 

 which is unfortunately in a language that I cannot read. 



Having thus discussed the four rival systems, I propose next 

 to off'er my own attempt at a reclassification of the Botifers. 

 Of course I can lay little claim to originality, and cannot 

 pretend to do much more than select and combine the best 

 thoughts of my predecessors. I have availed myself of Dujar- 

 din's orders, and of Leydig^s use of the foot, and I have left 



