spoNGnDA. 595 



priority, is accompanied by a diagnosis, while the characters of the 

 latter are merely hinted at, I believe the right course is to adopt 

 the former. 



6. Carterispongia otahitica. 



Spongia otahitica, Esper, Pflanzmth. Fortsetz. i. p. 209, pi. bd. 

 %8. 7, 8. 



A flabeiliform and two cup-shaped, internally proliferating speci- 

 mens. The former exhibits signs of incipient formation of a cup, 

 and thus shows Esper to have been right in uniting the two out- 

 wardly different forms under one head. Two simple cuprshaped 

 specimens and an irregularly grown proliferating flabeiliform one 

 also occur. 



Hah. Grlorioso Islands, beach and between tide-marks ; Amirante 

 Islands, beach ; SeycheUe Islands, 7 fms. 



Distribution. See Part I. of this Eeport, p. 386. 



7. Carterispongia mantelli. 



Halispongia mantelli, Bowerbarik, P. Z. 8. 1874, p. 303, pi. xlvii. 

 figs. 3, 4. 



A small but deep regularly cup-shaped specimen, gross height 

 45 millim., that of cup 35 miUim., diameter of cup at margin 

 32 miUiin. The outside is marked by faint longitudinal ridges ; on 

 the inner surface the vents, about -5 millim. in diameter, are arranged 

 in approximately concentric series round thfe cup, at intervals of 

 3-4 millim. Bowerbank's description of the vents is unsatisfactory. 



The skeleton contains much less sand than Bowerbank's specimen, 

 but agrees with it in the general characters of the skeleton, the 

 differences being to some extent due to age. As stated in the 

 Report on the Australian coUeotions, this species agrees essentially 

 with the characters of Oarterispongia. The colour (in spirit) is 

 greyish brown outside, dirty white inside. 



Hah. Mozambique, between tide-marks. 



Distribution. " South Seas " (Bowerbank). 



8. Carterispongia pennatula. 



Spongia pennatula, Lamarck, Ann. Mus. Sid. Nat. x%. p. 440< 

 Carteriospongia radiata, Syatt (typical form and var. complexa), 



Mem. Bost. 8oe. ii. pp. 641, 643. 

 Mauricea lacinulosa. Carter, Ann. 8f Mag. N. H. 1877, xx. p. 174, 



This species varies in. outward form from contort flabellate, with 

 single thick stem, to compound, multicaulate, anastomosing, with 

 thin stems, the terminal fronds narrower or broader flabeiliform. 

 In much-washed specimens the surface has an eroded appearance, 

 from the exposure of the ramifications of the canal-system, and such 

 specimens are usually of a pale brownish-yeUow colour ; -when the 

 sareode is preserved, the surface of dry specimens is white, and 



2a2 



