ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
351 
Little is as jet known as to the details of the developmental history of 
these worms. 
In the second or systematic portion of his work, the author, after 
some preliminary observations, defines the family Holostomidee, which he 
divides into (1) the Diplostomese, with much flattened fore-bodies, and 
containing Diplostomum (with four new species) and Polycotyle ; (2) the 
Hemistomeae, in which the sides of the fore-body are curved round, and 
containing Hemistomum (with fourteen species, one of which is new) ; 
(3) the Holostomeae, in which the fusion of the lateral edges of the 
flattened fore-body has led to the formation of a cup ; in this are included 
the twenty-eight known species of the genus Holostomum , some of which 
are now for the first time described. 
Anomaly of Genital Organs of Taenia saginata.* — Dr. R. Blan- 
chard calls attention to a curious inversion of the genital organs of this 
Cestode. A segment about the 750th, situated between two normal 
joints which contained a large number of testicular vesicles but in which 
the uterus had already numerous lateral ramifications, was found to be 
larger than its neighbours; there was some trace of an aborted inter- 
calated ring ; on either side was a marginal pore. Of these, that on the 
right side was related to a complete hermaphrodite apparatus, which 
presented all the usual characters ; the apparatus, however, which was 
connected with the left pore had a normal unpaired ovarian lobe, two 
feebly developed lateral lobes, and a normal body of Mehlis. With this 
latter was connected a vagina which was curved from behind forwards 
and was accompanied by an efferent canal of normal aspect. 
5. Incertae Sedis. 
Bohemian Rotifera.t — Herr F. Petr gives a list of Rotifera from 
Bohemian highlands. He enumerates eighty species including two new 
forms, Floscularia diadema and Battulus antilopseus. 
Galician Rotifers. J — Dr A. Wierzejski gives a list of fifty species of 
Rotifera found in Galicia. Brachionus forjicula is a new species, and 
varieties of Polyarthra platyptera, Schizocerca diversicornis, and Brachi- 
onus dorcas are described. 
Echinodermata. 
Echinoderms of Ceylon.§— Prof. H. Ludwig reports on a small collec- 
tion of Echinoderms from Ceylon, six of which are now recorded for the 
first time from the shores of that island. The most interesting of the 
observations are, however, on an already recorded species Ophiomastix annu- 
losa. The dorsal knob-like spines were found to differ in minute structure 
from the ordinary arm-spines, for their epidermis was very much thicker 
and was very richly supplied with nerves. On this point Hamann has 
already made some observations and has suggested that some of the cedis 
are sensory. Prof. Ludwig would rather regard these as supporters to 
the glandular cells, but it is obvious that the question is not one that 
can be settled on spirit specimens. 
* Bull. Zool. Soc. France, xv. (1890) pp. 166-8. 
t SB. K. Bohm. Gesell. Wiss., ii. (1890) pp. 215 -25 (2 figs.). 
X Bull. Soc Zool. Fiance, xvi. (1891) pp. 49-52 (4 figs.). 
§ SB. Naturhist. Ver. Breuss. Rheinland, xlvii. (1890) pp. 98-105 
2 B 2 
