93 



The spicules of the cautozooids may be divided into two groups, (1) spicules 

 similar to those of the lower end of the stalk but longer and proportionally 

 narrower and with fewer ribs ; and (2) long spindles or rods with rough jagged ends 

 and minute longitudinal ribs. The measurements, taken as aljove, are as follows : 



1. 0-3x0-02; 0-2x0-02; O-lxO-03. 



2. 3-0x0-4; 2-2x0-23; r8x0-22; l-7xO-3. 



The present specimen agrees with the description given by KoUiker except in 

 a few points, e.cj., some of the autozooid spicules are larger, and the arrangement of 

 the spicules on the body wall is not so markedly in eight rows continuous with 

 the tentacle rows. 



The Indian Ocean specimen agrees closely with several collected by the 

 " Scotia." The arrangement of the spicules in eight rows is somewhat disguised 

 in the " Scotia " specimens, so that no weight can be attached to this point. 



Locality: Laccadives ; 1132 fathoms. 



The geographical distribution of this species is very interesting, for it has been 

 previously recorded from Station 234, North Pacific Ocean, south of Yeddo, Japan, 

 by the "Challenger," and from 48° 6' S. and 10° 5' W. l)y the Scottish Antarctic 

 ship " Scotia." 



The Ijathymetric range is 565-1742 fathoms. 



Umbellula dura, n. sp. Plate VIII. fig. 9. 



The stalk is long (280 mm.) and liexible, with an enlargement at the lower 

 end. It is cjuadrangular, and has a rough sandpaper-like appearance when dried. 

 The axis is almost cylindrical. 



The rachis is short, and forms an irregular inverted cone flattened laterally 

 and gradually diminishing until it joins the stalk. The autozooids are few and 

 large. In the smaller of the two specimens there are three, and as they appear to 

 arise at the same level they may be in a circle ; or, as the median one is smaller, it 

 may be the terminal autozooid with two others lateral, and thus the arrangement 

 may be bilateral. In the larger specimen there are four large and two very small 

 autozooids, and they may be classed into three sets according to size, one very large, 

 three scarcely so lai-ge, and of nearly equal .size, and two small, again giving a type 

 of bilateral arrangement, or an arrangement of one terminal and an imperfect whorl 

 with two smaller polyps placed between the older. 



Tlic siphonozooids occur all over the rachis ; they are small, and scarcely raised 

 above the surface. 



The spicules of the autozooids are of two distinct types : 



1. Small rods blunt at the ends and covered by longitudinal ribs formed of 



pointed conical spines ; and 



2. Long rods either slightly pointed or blunt and slightly thicker at the 



