148 EXPEDITION OF THE "ALBATROSS," 1899-1900. 



Liriope hyalina Agassiz and Mater. 



Liriope hyalina Agassiz and Mayer, 1899; Bull. Mus. Comp. Zobl., Vol. XXXII., p. 166, 

 PI. 9, Fig. 32. 



Specimens of this medusa were found by the " Albatross " in the Mar- 

 quesas, Paumotus, Society, Ellice, and Marshall Islands ; and they were 

 especially common in the tropical part of the open ocean between California 

 and the Marquesas. We found this species in the Fiji Islands in 1897-98. 



S rf ; Station 13 



S rf ; " 14 



S"; " 16 



(300 f— S)", S"; " 25 



S" ; " 31 



September 5, 1899 ; X. Lat. 9° 57', W. Long 137° 47'. 

 " 7, " " 6° 41', " 137° 



9, " « 2° 38', " 137° 22'. 



" 14, " Between Ua Iluka and Marchand Islands, Marquesas. 

 " 19; S. Lat. 12° 20', W. Long. 144° 15'. 



S"; October 22 ; Lagoon of Makemo Island, Paumotus. 



(100 f — S) d ; Station 173; November 4 ; S. Lat. 18° 55', W. Long. 146° 32'. 



S"; " 17; off Bora Bora Island, Society Islands. 



(150f — S)''; Station 195; December 22; S. Lat. 10° 47', W. Long. 179° 30'. 



S" ; " 25 ; Lagoon of Funafuti, Ellice Islands. 



S"; January 20, 1900; Lagoon of Likieb Island, Marshall Islands. 



Dipleurosoma paciflca, sp. nov. 

 Plate 3, figs. 13, U. 



The bell is very flat, being about three times as broad as it is high, and 

 23 mm. in diameter. The surface of the ex-umbrella is reticulated by a 

 regular system of hexagonal elevations bounded by shallow furrows. There 

 are about one hundred short tentacles with narrow bulbular bases. The 

 entodermal core of these tentacles is solid and composed of chordate cells. 

 At the bases of most of the tentacles, upon the lower side, there is a single 

 black ocellus. Slender club-shaped sensory bodies are scattered at frequent 

 and irregular intervals between the tentacles. The entodermal core of these 

 bodies is solid, and very similar to that of the tentacles. There are no 

 otoliths. The velum is narrow. Six radial canals arise in groups of three 

 from diametrically opposite sides of the stomach. In the single specimen 

 examined two of these canals bifurcate, and thus eight canals reach the 

 circular vessel. The gonads are linear and occupy the middle region of 

 the eight canals. Their surfaces are slightly papillate, and the ova stand 

 out as hemispherical protuberances. The stomach is elongated in the 

 direction of the two opposed groups of radial canals. The proboscis is 



