610 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Whenever this rotifer is placed in its genus it will have to be re- 
named, as there already is Salpina bicarinata — see Sup. Hudson and 
Gosse, p. 38, pi. xxxiii. fig. 30.” 
Fig. 90. a 
Rotifer without “Rotating Organ.” *— Prof. A. Wierzejski has 
discovered near Krakau a remarkable rotifer, which he names Atrochus 
tentaculatus g. et sp. n. The body is soft-skinned, without true segments ; 
its anterior end is a broad funnel, with a wide central mouth, which is 
surrounded by a five-lobed wreath of hollow, conical tentacles. A ciliated 
apparatus is entirely absent, as is the foot, the latter being repre- 
sented by a cupola-like, retractile, terminal joint, on which the cloaca 
opens. The body is covered by a layer of mud. On the gut there is a 
crop, and behind this a gizzard, with strong masticating organs. The 
gonads consist of ovary and uterus ; the young are born viviparously ; 
the male is unknown. The maximum length of the animal is 1*415 mm. 
The food consists of unicellular algae. This new type seems to come 
nearest to Acyclus inquietus Leidy and Apsilus lentiformis Metschnikoff, 
aberrant Flosculariidae. 
New Floscularia.f — Prof. A. Wierzejski has a preliminary notice of 
Floscularia atrochoides, a Rotifer which unites the essential characters of 
a true Floscularia with those of the author’s lately described Atrochus 
tentaculatus. In habits it calls to mind F. uniloba , but it has no 
gelatinous investment ; in the contracted stage it is so like Atrochus that 
it might easily be mistaken for it. From all the known species of its 
genus it is distinguished by its free mode of life. 
The structure of the internal organs agrees almost exactly with that of 
Atrochus , but the masticatory organs have the unci broad and bidentate. 
A diverticulum corresponding to the contractile vesicle of other Rotifers 
* Zeitschr. f. wiss. Zool., Iv. (1893) pp. 696-712 (1 pi.), 
t Zool. Anzeig., xvi. (1893) pp. 312-4 (1 fig.). 
