14 Records of the Indian Museum. [MOEsaE 
A form of D. mutulata was figured by Miss Thornely (1904, 
pl. ii, figs. 64, 6B, p. 118), and was described as having hydrothecee 
which are ‘‘ smaller and less prominent [than on other D. mutulata 
specimens] and sometimes sub-alternate, and the gonothece on 
these have only a few spines near the top and are of smaller size.’’ 
This form appears to me to belong to the species described above. 
Miss Thornely’s specimens were found in the neighbourhood of 
Ceylon. 
LOcaLity : Growing on the root-like masses at the base of 
Lytocarpus pennarius, Andaman Islands. Collected by J. Wood- 
Mason. 
Type in the Indian Museum, Calcutta. 
Family PLUMULARID. 
Antenella secundaria (Linueeus). 
Linneus, C., 1788-1793, p. 38543; as Sertularia secundaria. 
Pictet, C., and Bedot, M., 1900, p. 27, pl. vi, fig. 7; as Plumu- 
laria secundaria. 
Only a few small colonies of this species occur in the collection. 
The characteristic minute sarcotheca which lies in the angle behind 
the hydrotheca is clearly present; the architecture differs in no 
detail from that of Atlantic specimens of this well-known species. 
No gonangia are present. 
It is not without considerable hesitation that I have transferred 
this well-known species from Plumularia to Allman’s genus, 4A xte- 
nella. But, while it seems absurd to place in distinct genera, 
forms the minute structures of which are so similar as are those of 
Plumularia catharina and Antenella secundaria, yet it is sufficiently 
clear that the simple hydroclade-stem is characteristic of a consider- 
able number of species, and therefore as a matter of systematic con- 
venience it appears reasonable that Antenella should be retained as 
a separate genus, or at least as a sub-genus of Plumularia, until the 
classification of the EKleutheroplean Plumularians has been placed on 
a basis more satisfactory than that which at present holds. 
Recent synonyms.—I am unable to find any character in Dr. E. 
Warren’s description and figures of Antenella natalensis, Warren 
(1908, p. 318), which could separate it from the Linnean species 
recorded above. A. natalensis is obviously a synonym of 4. secun- 
daria, 
In 1904 Miss Thornely described from Indian seas specimens 
of Antenella gracilis, Allman (1877), which ‘‘ resemble the branches 
of M[onostechas| quadridens exactly ’’ (p. 121). ‘These specimens, 
through the kindness of Miss Thornely and Professor W. A. Herdman, 
I have been allowed to examine. They differ from 4. gracilis, as 
described and figured by Allman, in possessing an exceedingly 
minute postcalycine sarcotheca, while in Allman’s species the 
superior median sarcotheca not only does not lie exactly in the 
angle between hydrotheca and internode, but it is equal in size to 
