KO.2203. ^ ^^W SPECIES OF BEAR-ANIMALCULE— HAY. 253 



upper ends nor have bearers been detected. The pharynx is small, 

 nearly spherical and does not appear to contain chitinous thicken- 

 ings. The pharynx opens directly into the large, irregularly lobate 

 stomach. The reproductive organ lies above the stomach. It is a 

 large, fusiform structure which begins a little in front of the middle 

 of the body and extends back nearly to the hind legs where it turns 

 abruptly downward to join the posterior end of the stomach. Tlie 

 anal opening has the appearance of a small, round papilla on the 

 ventral surface immediately in front of the last pair of legs. The 

 muscle bands underlying the epidermis of the body and those ex- 

 tending into the legs are quite conspicuous. 



In all the specimens examined the stomach is filled with a yellow- 

 ish or greenish-brown mass evidently of vegetable origin and there 

 can be no doubt that the animal devours the seaweed on which it 

 occurs. In some of the specimens the reproductive organ appears 

 to contain eggs but their outline is so indefinite that it is unsafe to 

 state their number or character. In most cases the reproductive 

 organ contains a granular mass the nature of which is hot evident. 



The species at hand resembles B. mlrus Eichters in all important 

 characters but appears to differ markedly in the presence of eyes, 

 the character of the sense organ at the base of the lateral cirrus of 

 the head, the presence of the lateral cirri near the posterior end of 

 the body and in having more slender toes with smaller terminal 

 expansions. 



In Professor Kichters' original description of B. mirus the median 

 frontal cirrus is not mentioned nor is the posterior tail-like process 

 although the latter is plainly shown in the microphotograph which 

 accompanies the description. In a subsequent article ^ the state- 

 ment is made that the posterior cirri are represented by strong spines 

 and these are shown in the figure. The frontal cirrus and the 

 median posterior process are neither mentioned nor shown in the 

 figure. In the separate of this paper, however, which was received 

 from Professor Eichters the statement concerning the posterior 

 strong spines has been struck out and in a manuscript note the tail- 

 like process is described. In the figure also Professor Eichters has 

 added the median frontal cirrus and a papilla at the base of the 

 first pair of cirri. 



The specimen of B. mirus which, thanks to Professor Eicliters, 

 I have been able to examine, is mounted on a slide in such a position 

 that most of the cirri in question can not be clearly discerned, but 

 I strongly suspect that B. minis and B. caudatus will be found to 

 be more alike than they are now believed to be. The posterior pair of 

 setae in /?. caudatus are extremely delicate and, perhaps because they 



» Verb. d. Deutsch. Zool. Gescll., vol. 19, 1900, pp. 84-94, pi. 3, flg. 5. 



