510 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 84 



cut on side of gastropore, such cyclosystems measuring about 1 to 

 1,25 mm in diameter. There are smaller ones, with 10 to 12 pores, 

 on the smallest branches; and in the female specimen there are num- 

 erous large ones (1.5 mm in diameter) with upward of 20 dactylotomes 

 (pi. 41, fig. 2). Owing to small dactylopores and narrow dactylotomes 

 the styles are extremely small, although the spicules extend above the 

 mouth of the pore proper in many of the systems. 



The male ampullae are very similar to those of camvyleca, but the 

 roof is a shade thicker. The female ampullae are even more promi- 

 nent than in campyleca, usually projecting more than a true hemi- 

 sphere, and have slightly thicker, spongier walls. The interior surface 

 is usually deeply fenestrated, forming a coarse, spongy reticulum with 

 irregular projections into the lumen, which is in some cases partly 

 or even entirely occluded. Other ampullae have a fairly firm inner 

 surface, wliich is simply irregularly pitted. The summit of some of 

 the ampullae is very slightly irregular with incipient folds or knobs; 

 others are perfectly smooth. 



The coenosteum is shnilar to that of campyleca. In properly cleaned 

 material the microscopic pores are even more evident. 



Color pale buff, becoming pure white after clearung with sodium 

 hypochlorite. 



JVpe.— U.S.N.M. no. 43263. 



Type locality- Station 4781, off Agattu Island, Aleutian Islands, 

 lat. 52°14'30" N., long. 174°13' E., 482 fathoms, fine gray sand, 

 pebbles; bottom temperature 38.6° F, 



Remarks. — This form has been interpreted as a deeper water race 

 of A. campyleca. 



ALLOPORA CAMPYLECA TRACHYSTOMA. new subspecies 



Plate 45, Figure 2; Plate 46; Plate 54, Figures 1-16 



Diagnosis.— Colony ornate with massive irregular stems and often 

 flattened branchlets which do not anastomose freely; coenosteum 

 buffy pink, minutely roughened; cyclosystems w4th upward of 18 

 long, narrow, deep dactylotomes separated by rough coarsely porous 

 septa, which encroach upon the narrow gasirostome and are continued, 

 as decurrent ridges, on the walls of gastropore; the latter deep, 

 slightly curved, and with a differentiated style chamber, the upper 

 border of which is sparsely armed with spicules; style medium 

 slender. Largest fragment 165 mm by 80 mm; main stem 30 mm in 

 diameter. 



Description. — The color is buffy pink, becoming a decided pale 

 pink after cleaning with sodium hypochlorite. The colony is dendritic 

 but compressed into an irregular flabellate form, the distal branches 



