550 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 84 



3-3d, Allopora brochi: 3, Type, X 60, portion of a cyclosystem showing details of 

 four dactylotomes; 3a, type, X 20, a full-sized cyclosystem and two female 

 ampullae; 36, type, X 20, section of a cyclosj^stera and two ampullae; 3c, 

 type, X 20, a gastrostyle, showing also spicules on wall of style chamber; 

 3d, type, X 20, one of the small gastrostyles mentioned in text. 



Plate 43 

 Allopora campyleca paragea: Front view of type colony, natural size. 



Plate 44 

 Allopora brochi: 1, Branch of type colony, X 5; 2, type colony, about natural 

 size, taken 90° to left of viewpoint of fig. 1. 



Plate 45 



1, Allopora brochi: Type, slightly enlarged. 



2, Allopora campyleca trachystoma: Front of type (female), natural size. 



Plate 46 

 Allopora campyleca trachystoma: 1, Front view of a fragment of male colony, 

 natural size; 2, enlargement of right center of fig. 1, X 5. 



Plate 47 

 Stylaster gemmascens alaskanus: 1, Front view of a male colony, X 2; 2, en- 

 largement of distal branchlets of fig. 1, X 5; 3, end of a female colony show- 

 ing flattened branchlets, spiny outgrowths, and two ampullae, X 5 (this is 

 the left distal branch of pi. 48, fig. 1) . 



Plate 48 

 Stylaster gemmascens alaskanus: 1, Front view of branch of female colony, para" 

 type, X 2 (see pi. 47, fig. 3) ; 2, front view of portion of type fragment, male, 

 X 5. 



Plate 49 



1, Stylaster elassotomus: Type, front view, X 1%. 



2, Allopora moseleyana: Female colony, from station 3480, front view, X 2. 



Plate 50 

 Allopora moseleyana: Fragment of a female colony (not of pi. 49, fig. 2), from 

 station 3480, X 5. 



Plate 51 

 Allopora moseleyana: Type, male colony, from station 4781. 



Plate 52 

 Allopora moseleyana forma leptostyla: 1, Fragment of male colony showing 

 ampullae, front view, X 2; 2, most of type colony, front view, X 1%; 3, 

 fragment of female colony, front view, X 5. 



Plate 53 

 1-16, Allopora moseleyana: 1, Two cyclosystems of the type, X 30, extreme 

 diameter of cyclosystem including dactylopores 0.85-0.9 mm, diameter of 

 style 0.25 mm, on left tubercles of coenosteum (a, ampulla; p, coenosteal 

 pore); la, X 30, sectioned cyclosystem with robust style 0.47 mm long, the 

 ventral or bottom chamber of the gastropore shown darker; 16, X 30, 

 sectioned cyclosystem showing also longitudinal section of dactylopores, 

 style 0.6 mm long and ventral chamber of gastropore large; above the rim 

 of cyclosystem is another intended to show the normal variation in depth of 



