486 PROF. A. DENDY AND MISS L. M. FREDERICK ON 
different spscifically from G. cylindrka. We are now in a position, however, 
as the result of microscopical examination of the very small, fragmentary type 
in the British Museum, to state that Hypograntia infrequens and Grantiopsis 
cylindrica are specifically identical. This being the case, it might be argued 
that both the generic and the specific names proposed by Carter should take 
priority. 
As to the generic name Hypograntia, it must be pointed out, in the first place, 
that the diagnosis of this genus contains nothing that is distinctive, and is 
founded upon an obvious error with regard to the structure of the canal- 
system, and, in the second place, that although Hypograntia infrequens is the 
first of six species described in the same paperj it is said to be " incertce sedis," 
so that it cannot reasonably be regarded as the type of the genus, and as it is 
quite distinct generically from the five remaining species, it seems advisable 
to retain the generic name Grantiopsis (originally regarded as a subgenus of 
Grantia'). 
As to the specific name infrequens, it must be pointed out that Carter's 
description of the species is quite unrecognisable. He altogether omits the 
most characteristic feature of the sponge, viz. the reduced tubar triradiates, 
and describes the subgastral quadriradiates as triradiates. It was only the 
fact that we happened to have access to Mr. Carter's manuscript drawings that 
put us on the track of the identification. Even in these drawings the reduced 
tubar triradiates are not shown. Had the identification be n established 
before the publication of the name Grantiopsis cylindrica, it would doubtless 
have been better to call the species Grantiopsis infrequens, but as the former 
name has now become established in the literature and as Mr. Carter's species 
was not recognisably described, we see no sufficient reason for reverting to 
his name. 
Previously known Distribution. Port Phillip Heads {I)endy, Carter). 
Register ISo. and Locality. I. 1, VI. 17 c, VII. la, VII. 1//, VII. 1 c, 
Sandy Isle. 
9 a. Grantiopsis cylindrica Bendy var. fkuticosa uov. (PI. 25. fig. 9.) 
The specimen, which is colonial, branched and bushy, consists of about 14 
persons united together at their bases by short connections ; each person 
forms a slightly curved cylindrical tube with a circular osculum at the 
summit without projecting fringe ; the persons average only 12 mm. in 
length, with a nearly uniform diameter of 3'5 mm. ; they have an almost 
smooth surface, with a characteristic glistening appearance due to the 
presence of the large tangential triradiates. Colour in spirit veiy pale 
coffee-brown ; texture compact and firm. The skeleton arrangement, canal 
system and spiculation agree so closely with those of the typical form that 
no detailed description is necessary. 
The variety dilfers from the type of the species chiefly in its bushy habit 
and the smaller size of the individual persons, but also in that the dermal 
