DEXDROSO^[A RADIAXS, ERREXBERG. 
175 
The genus Trichophrya was described by Claparede and 
Lachmanii, 1858-61. The original type-species is T. 
epistvlidis, a common species usually attached to the stalk 
of Epistylis. We have found it frequently in the Bridgewater 
canal collections, and the specimen we have drawn in fig. 
46 Tr. was about 129‘5/_t by 111 ju in size. 
'Paking this as a type we may say that it differs from a 
full-grown Dendrosoma in its small size and the relative 
shortness of its anus. It might be thought to be a young 
Dendrosoma, but it differs from the young Dendrosoma in 
having several shoi’t arms instead of only one or two. The 
voung Dendrosomas shown in figs. 47 and 48 are smaller than 
the Trichophrya shown in fig. 46, but nevertheless exhibit 
the characteristic Dendrosoma form. 
There inust also be some important difference between them 
in the character of the micro-nucleus, but the nature of this 
difference we cannot describe. It is perfectly easy, as our 
figures show, to demonstrate the presence of micro-nuclei in 
young Dendrosoma, but we have not yet been able to find 
definitely the micronucleus in any specimen of Trichophrya 
we have examined. 
In Trichophrya epistylidis, according to Stein, 
Biitschli, Sand, and other writers, the single gemmula that is 
formed in the brood-chamber may divide into four or eight 
gmnmuhe before liberation. AVe have not observed a similar 
mode of repi’oduction either in Lernfeophrya or in Dendro- 
soma. 
The figure given by Biitschli of the free-swimming 
gemmula of T. epistylidis shows that it must be very 
similar in shape to the gemmula we have ascribed to 
Lernajophrya (fig. 31). 
Several other species of the genus have been described by 
Sand and others, but of these we have very little detailed infor- 
mation. Some of them, such as T. salparum, T. amoe- 
boides, T. odontophora and T. mirabilis are marine. 
One of these at least, T. mirabilis, found attached to hydroids 
at Banyuls, may possibly be more closely related to the genus 
