PORPITA PACIFICA. 333 



whether the geographic range of the Indian and Atlantic forms is continuous 

 or discontinuous, would be of great value. 



Porpita pacifica Lesson. 

 Plate 28, fig. 1-10, 12, 1.3, 14; Plate 29. 



Porpila pacifica Lesson, '26, pi. 7, iig. 3, 3 ' ; '30, p. 2, 59; Agassiz and Mayer, : 02, p. 159; Mayer, : 06, 



p. 1134, 

 Porjtita ramifera Eschscholtz, '2(), p. 745; '29, p. 178, taf. 16, fig. 3. 

 Porpita coendea Eschscholtz, '25, p. 744; '29, p. 179, taf. 16, fig. 5. 

 Porpila radiata Brandt, '35, p. 40. 

 Porpita species ? Hu.xley, '59, p. 122, 126, fig. A-C. 

 PorpiteUa coendea Haeckel, '88a, p. 130. 

 Porpitella radiata Haeckel, '8Sa, p. 30. 

 Porpita fungia Haeckel, '88b, p. 67, pi. 45. 

 Porpitella peclanlhis Haeckel, '88b, p. 64, pi. 46. 

 Porpitella coerulea Haeckel, 'S8a, p. 30. 

 Disconalia ramifera Haeckel, '88b, p. 357. 



Disconalia gastrohlasta H.aeckel, '88a, p. 30; '8Sb, p. 48, pi. 49, fig. 7-12; pi. 50, fig. 

 ? Discalia primordialis Haeckel, '88a, p. 30; '88b, p. 46, 



1 specimen 3 mm. in diameter, fragmentary. 

 2.5 mm. in " 

 " both 3 mm. in diameter, well pre- 



served. 

 " 4631 " 2 " 1.5 and 4 mm. in diameter, well pre- 



served. 

 " 4640 " 1 " 11 mm. in diameter, fairh^ preserved. 



4649 " 18 " 40-55 mm. in diameter, well pre- 



served. 

 At this Station a swarm was en- 

 countered. 

 " 4707 " 1 " 12 mm. in diameter, fair. 



Also:— Lat. 9°57'N., long. 1.37° 47' W.; surface ("Albatross" Ex. 1899- 

 1900, Station 13). 7 specimens, 14-25 mm. in diameter in excellent condition, 

 being the specimens recorded by Agassiz and Maj^r ( : 02) ; and Hawaiian Is- 

 lands: — surface ("Albatross" Hawaiian Expedition 1902, Station 4188); 4 

 specimens 7-16 mm. in diameter, recorded by Mayer (:06). 



The large series from Station 4649, where a swarm was encountered, gives 

 opportunity to add something to our knowledge of P. pacifica. The general 

 external form, and arrangement of zooids, in which it resembles P. umbella, has 

 been well described and figured by Haeckel. Certain features, however, need 



