MEDUSAE. 141 



The following table will serve to show the extent of our captures: — 



Hydroinedusse . 

 Scyphomeduste 

 Siphonophorae . 

 Ctenopborae 



Number of Species 

 obtained. 



20 

 8 

 10 

 4 



42 



Number of Species 

 new to Science. 



11 



4 

 4 



2 



21 



Number of Species 

 already known. 



21 



The following forms are represented in both the Tropical Pacific and 

 Atlantic by identical or very closely allied species : Aglaura prismatica, 

 Liriope hyalina, Nausithoe punctata var. pacifica, Abyla quincunx, Necto- 

 physa Wyvillei ? 



DESCRIPTION OF THE SPECIES. 



HYDROMEDDS^l. 



Sarsia sp. 



A single specimen of a young Sarsia in a greatly damaged condition was 

 found on the surface when the nearest land (the Marquesas Islands) was 

 over 1000 miles away. It is remarkable that this Leptolina form should 

 have been taken so far out upon the open ocean. 



S-'; « Station 13 ; September 5,. 1899 ; N. Lat. 9° 57', W. Long. 137° 47'. 



Tiara oceanica, sp. nov. 



Plate 1, fig. 1. 



The bell is acorn-shaped and 5 mm. in height. The walls are very thin, 

 and there is a small, solid, apical projection. There are eight long, eight 

 medium size, and sixteen short tentacles. The long ones are about as great 

 in extent as the bell height. The medium tentacles are about one-third as 



1 S d indicates a surface tow made in the daytime ; S" a surface tow made at niirht ; (150 f — S) rf 

 indicates a haul made with an open net dragged between 150 fathoms and the surface during the day ; 

 (150 f — S)" indicates the same made at night. 



