552 PROCEEDINGS OF THE NATIONAL MUSEUM vol.84 



Plate 60 

 Allopora porphyra, alcoholic specimen from Carmel Bay, Calif, (tissue consider- 

 ably smooths the surface and partly obscures the calcareous papillae; a 

 fragment of this colony is U.S.N.M. no. 43277): 1, Enlarged slightly over 

 twice natural size; 2, a portion near center of fig. 1, X 4. 



Plate 61 



1, la, Allopora porphyra: 1, A typical cyclosystem with four gastrostyles viewed 



directly from above, X 30; la, a section of a cyclosystem showing two gastro- 

 styles and four dactylostyles. The dotted line crossing the gastrostyles 

 indicates the bottom of the cup; the lower, dash, line is the bottom of the 

 colony, which was here very thin; on the right an entire dactylopore is 

 shown in section, X 30. 



2, 2a, Allopora venusta: 2, A cyclosystem from above, specimen from oflf Cape 



Flattery, X 30; 2a, section of a cyclosystem for comparison with fig. 36, 

 X 30. 



3-36, Allopora californica: 3, Three cyclosystems of a specimen from Monterey 

 Bay, X 30; 3a, a cyclosystem of the type, X 30; 36, section of a cyclosystem, 

 specimen from Monterey Bay, X 30; on either side are portions of female 

 ampullae. 



Plate 62 



Crypiohelia trophostega: 1, A lid with dorsal wall removed to show the contained 

 ampullae, the circular apertures of which are in the lower wall of each 

 chamber and therefore pierce the lower wall of the lid directly over the 

 gastropore, X 15; 2, a cyclosystem viewed from the side, showing a lid with 

 two points of attachment, the spots indicating nematophore pits, X 15; 3, a 

 section of a cyclosystem having a lid with two points of attachment, three 

 ampullae (a) shown in section and at the bottom of the gastropore the very 

 small ventral chamber (vc), X 5; 4, a cyclosystem viewed directly from 

 above after removal of the lid in the stem of which are parts of three am- 

 pullae (a) (in the center of the gastropore is the round aperture leading to 

 ventral chamber), X 15; 5, half of a cyclosystem sectioned in the plane x-x, 

 fig. 4, but of a smaller cyclosystem; above are the dactylotomes, which do not 

 communicate directly with the ventral chamber (vc), X 15; 6, a small cyclo- 

 system at end of a branchlet, showing nematophore pits, X 15; 7, a portion 

 of the main stem in a distal part of the colony showing variations in form of 

 cyclosystems and the nematophore pits, X 5 (the pits are not so conspicuous 

 as it is necessary to make them in the drawing; a, a lid with six ampullae 

 mentioned in text) ; 8, a view of a fairly large cyclosystem from above with 

 a lid in place, width of lid 2.8 mm, X 15. 



Plate 63 

 Cryptohelia trophostega: Type, anterior face, natural size. 



Plate 64 



1. Cryptohelia pudica Milne Edwards and Haime (but not of Moseley): Specimen 

 from Sulu Sea, 508 fathoms, X 2. 



2-4, Cryptohelia japonica (Milne Edwards and Haime): 2, 3, Specimens from sta- 

 tion 4924, Colnett or Vincennes Strait, 159 fathoms; 4, from station 4890, 

 Eastern China Sea, 135 fathoms. X 2. 



6, Cryptohelia gigantea: Type, from station 2818, Galapagos Islands, 392 fathoms, 

 X 2. 



