REPORT ON PHILIPPINE HYDROIDA 225 



fathoms. China Sea, vicinity of Formosa, Ibugos Island, 20° 19' 

 30" N., 121° 51' 15" E.; depth, 26 fathoms. 



Distribution. — The type and until now the only known specimen 

 was from near Little Cat Island, Bahamas, from shallow water. 



The specimens secured of this species were rather fragmentary, 

 and, of course, much smaller than the type which was one of the 

 largest plumularian hydroids that the writer has ever seen. 



PLUMULARIA CAMARATA, new species 



Plate 44, figs. 3, 4 



Trophosome. — Colony flabellate in form, 12 cm. high, and with a 

 spread of 4 cm. Stem, branches, and branchlets fascicled, very dark 

 in color, the branches springing irregularly from the opposite sides 

 of the stem and the branchlets similarly related to the branches. 

 Hydrocladia borne on the stem, branches, and branchlets alternate 

 on opposite sides of the branches from which they spring; not regu- 

 larly divided into internodes, the nodes being far apart, oblique, and 

 most apparent near the proximal end of the hydrocladia. These 

 latter have their interior divided by very strongly marked internal 

 ridges, there being usually four behind each h} r drotheca suggesting 

 a division of the hydrocladia into a number of chambers ; hence the 

 name w " eamamta:' These ridges are strongest on the proximal and 

 weakest on the distal parts of the hydrocladia. 



Hydrothecae very deep, tubular, three times as high as wide, and 

 of approximately equal diameter throughout most of their length. 

 Margin without teeth of any kind but sharply beveled on its adcau- 

 line side where it joins the hydrocladium at a very acute angle. 

 The hydrothecae are very closely approximated so that the top of 

 one reaches almost to the base of the one next above it. Xemato- 

 phores, supracalycine pair small, with hardly any evident support- 

 ing brackets, arising from the lrydrocladium at the point where it 

 is joined by the greatly beveled hydrothecal margin, their distal ends 

 slightly if at all, overtopping the highest (abcauline) part of the 

 hydrothecal margin. Often these nematophores appear to topple 

 over into the hydrothecal cavity. Mesial nematophores rarely pres- 

 ent in the specimen described, but the}' are occasionally seen on the 

 proximal part of the hydrocladia where they are borne on short, 

 rounded prominences just below the hydrothecal bases. Cauline 

 nematophores are found, often in pairs, on the stem and branches 

 near the axils of the hydrocladia. All nematophores are bithalamic 

 and free. 



Gonosome. — Not present. 



