SPONGIIDA. 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, Pflanzenth. Fortsetz. i. p, 209, pi. hi. 

 figs. 7, 8. 



A fkibelliform 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 cup-shaped 

 specimens and an irregularly grown proliferating flabelliform ono 

 also occur. 



Hab. Glorioso Islands, beach and between tide-marks ; Amirante 

 Islands, beach ; Soychelle Islands, 7 fms. 



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



7. Carterispongia mantelli. 



Halispongia mantelli, Bowerbank t P. Z. S. 1874, p. 303, pi. xlvii. 

 figs. 3, 4. 



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

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

 32 millim. 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 the 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, tho 

 differences being to some extent clue to age. As stated in tho 

 Report on the Australian collections, this species agrees essentially 

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

 greyish brown outside, dirty white inside. 



Hab. Mozambique, between tide-marks. 



Distribution. " South Seas " (Bowerbank). 



8. Carterispongia pennatula. 



Spongia pennatula, Lamarck, Ann. Mas. Hist. Nat. xx. p. 440. 

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



Mem. Bost. Soc. ii. pp. 541, 542. 

 Mauricea lacinidosa, Carter, Ann. fy May. N. H. 1877, xx. p. 174, 



This species varies in outward form from contort fiabellate, with 

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

 thin stems, the terminal fronds narrower or broader flabelliform. 

 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-yellow colour ; when the 

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



2q2 



