HYDROCORALS OF THE NORTH PACIFIC — FISHER 553 



Plate 65 



1, Errinopora stylifera: Front view, slightly enlarged, station 5016. 



2, Errinopora pourtalesii: Three branches of small colony from station 3159 (virtu- 



ally the type locality), X 3. 



Plate 66 



1, Errinopora nanneca: Type, front view, X 1.4. 



2, Errinopora pourtalesii: Main stem of small colony (pi. 65, fig. 2) showing 



primitive cyclosystems referred to in text. 



Plate 67 

 Errinopora nanneca: Front view of paratype from station 3599, X 1.3. 



Plate 68 

 Errinopora zarhyncha: Front view of type, slightly reduced. 



Plate 69 



1, Errinopora zarhyncha: A group of gastropores and dactylopores, X 15. 



2, 2a, Errinopora nanneca: Three ampullae and neighboring dactylopores and 



gastropores, X 15; 2a, two gastropores and three dactylopores, X 30. 



3, 3a, Errinopora stylifera: 3, Portion of surface of terminal branch showing char- 



acteristic arrangement of gastropores and dactylopores of several sizes (the 

 smoother swellings are ampullae), X 15; 3a, detail of a gastropore (in section) 

 and, above, of several dactylopores (surface view), X 30. 



Plate 70 



1, la, Errinopora pourtalesii: 1, Tip of a branchlet of specimen from Point Sur, 



Calif., showing the lipped dactylopores, dactylostyles, scattered circular 

 gastrostyles, and female ampullae (a, a, a) with perforated wall (the small 

 black spots are secondary dactylopores), X 15; la, from station 3159; above 

 are two dactylopores, one showing style; below are two gastrostyles; two 

 male ampuUae, the thin wall of which has been removed; X 30. 



2, 2a, Allopora porphyra: 2, A cyclosystem drawn from life showing a partly ex- 



panded gastrozooid, with eight tentacles, and contracted dactylozooids; 2a, 

 a cyclosystem drawn from life showing four gastrozooids, with five and six 

 tentacles, and encircling them the mostly retracted dactylozooids, X 30. 



3, Distichopora borealis: Type, detail of a terminal branch showing female am- 



pullae, dactylopores, and gastropores, X 20. 



Plate 71 



Distichopora borealis: 1, Type, female, from station 3480, X l}i; 2, another female 

 fragment from type locality, X l^s; 3, a male fragment from type locality, 

 X IH; 4, specimen from station 4781, female, natural size. 



Plate 72 



Distichopora borealis: Same specimen as pi. 71, fig. 2, enlarged five times to show 

 texture of surface, female ampullae, and dactylotome projections along 

 border of branches. 



Plate 73 



Distichopora borealis: Male specimen from station 3480, X 5. 



