On some Species of Fishes from the Philippine Islands. 397 



able and distinctive appearance to the polypide. The zooecia 

 are slender, and taper off very decidedly below ; when the 

 polypide is retracted they droop a little to one side, and rise 

 into an erect position when it expands. 



The polypides are extremely minute and delicate, and very 

 nimble in their habits ; those of Valkeria uva appeared coarse 

 and clumsy beside them. They are destitute of a gizzard, and 

 present altogether a very simple structure. 



EXPLANATION OF THE PLATES. 

 Plate XX. 



Fig. 1. One of the lateral sarcothecae (nematophores) of Aglaophenia 

 pluma, Linn., showing the thread-cells in action : a, the superior 

 lobe of the sarcostyle (s), which bears the thread-cells ; 6, the 

 inferior lobe, from which the extensile processes arise ; c, the 

 ectoderm of the coenosarc, from which the sarcostyle originates ; 

 d, the chitinous cup of the sarcotheca. 



Fig. 2. The bithalamic sarcotheca of Plumularia setacea, Ellis, showing 

 one of the extensile processes (pseudopodia) given off from the 

 sarcostyle : a, the superior lobe with thread-cells ; b, the ex- 

 tensile process ; >r, the terminal cup-shaped chamber of the sarco- 

 theca, in which the two lobes are lodged ; y, the inferior tubular 

 chamber. 



Fig. 3. The same, showing one of the processes (h) dividing into two 

 branches, of which one tends upwards and the other downwards. 



Fig. 3'. The same, showing a process with bulbous dilatation (b) : a, the 

 superior lobe ; s, the sarcostyle. 



Fig. 4. Campanularia neglecta, Alder : :c, a " fission-frustule " in course of 

 formation. 



Fig. 5. Campylonema tremultim, Hincks, highly magnified, with one of 

 the polypides expanded, showing the peciiliar arrangement of 

 the tentacles. 



Plate XXL 



Fig. 1. Plumularia cornu-copice, Hincks, natural size. 



Fig. 2. A portion of one of the plumes, magnified. 



Fig. 3. Two gonothecse, borne on a portion of the main stem. 



Fig. 4, A calycle of Plumularia Catharina, Johnston, showing the pedun- 

 culate sarcotheca (x). 



Fig. 5. A gonotheca (female) of Plumularia Catharina. 



Fig. 6. The planoblastof Cladoneyna radiatum, Dujardin, in an early stage 

 of development. 



LVI. — Notice of some Species of Fishes from the Philippine 

 Islands. By Dr. A. GiJNTHER. 



The British Museum has recently obtained a series of the 

 fishes collected by Dr. Adolf Bernhard Meyer in the Philip- 

 pine Islands. The following appear to be un described : — 



Platycephalus fasciatus. 

 D. 1 I 8 1 11. A. 11. L.lat. calOO. 

 The angle of the prceoperculum is armed with three spines^ 



