214 Dr. Hubrecht on a new Species of Cov'is. 



Fiy. 17. Siliceous sponge-spicules characteristic of a Pachastrella growing 

 over some of the groups of PoJytrema utriculare — Pachastrella 

 parasitica, n. sp. : a, skeletou-spicule spreading into a head 

 40-GOOOths inch in diameter; b, flesh-spicule, 5-6000ths inch 

 long. 



Fig. 18. Polytrema planum, n. sp., nat. size, on a branch of coral : a, coral ; 

 h, Polytrema ; c, its aperture ; d, group of Planorbulina vulyaris. 



Fig. 19. The same, diagram of a few of the chambers, maguitied, to show 

 their variety in form, also foraminatiou and stoloniferous inter- 

 communications. 



XX. — On a new Species of Coris from the Molucca Archi- 

 pelago. By Dr. A. A. W. Hubeecht, Conservator at the 

 Leyden Museum. 



This species (a specimen of which was among a collection 

 of fishes from the island of Ceram, sent by Mr. Liideking) 

 may be distinguished at a glance from any of the known 

 species of the genus by the oblong transverse pearl-coloured 

 spot which descends from between the fourth and seventh 

 dorsal rays. Another feature by which it may be easily distin- 

 guished is the (apparently) blue band running from the lips 

 along the throat to the ventrals. The back is crossed by 

 numerous transverse bands, darker than the ground-colour, 

 broader than the interspaces, and not continued on the belly. 

 The lower half of the dorsal fin is dark-coloured, the upper 

 half light ; both it and the anal fin have a thin dark-coloured 

 streak running close along the outer margin. 



I have named it after Dr. Bleeker, who has introduced into 

 science such a considerable number of new fishes from the 

 archipelago already. 



Coris Bleekert, sp. nov. 

 D. 2-}-jV a. 3 I 12. C.l|12|l. P. 2111. V. 1 | 5. 



C, corpora oblongo compresso, altitudine 4 circiter in ejus longitu- 

 dine, latitudiue 2\ ad 2| circiter in ejus altitudine, capite acutius- 

 culo 4 ad 4| circiter in longitudine corporis ; altitudine capitis 1|- 

 circiter in ejus longitudine ; oculi diametro 5| fere ad 6 in longitu- 

 dine capitis; ocuKs diametro 1| distantibus, diametro | ad | a linea 

 rostro-frontali remotis, linea rostro-frontali declivi eonvexiuscula 

 vel rectiuscula ; labiis carnosis ; maxillis subtequalibus, superiore 

 ante oculum desinente 4| circiter in longitudine capitis ; dentibus 

 maxillaribus biseriatis,intraeristalibus graniformibus minimis, cris- 

 talibus conicis acutis, anticis 2 caninis mediocribus curvatis promi- 

 nentibus ; augulo oris dcnte prominente nullo ; sqnamis lateribus 

 76 circiter in linea laterali absque caudalibus minimis ; linea 



