EEPORT ON THE RADIOLAEIA. 543 



Dimensions. — Eadiiis of the principal arms 0"4, of the lateral arms 0'2 ; basal breadth 0-06, 

 distal breadth 012. 



Habitat. — Indian Ocean, Belligemma, Ceylon, surface, Haeckel. 



2. Hagiastrum bramae, n. sp. 



Cross rectangular. Both longitudinal arms of equal size, one and a half times as long as the 

 transverse arms ; all arms thorny, club-shaped, at their pear-shaped distal part three tunes as broad 

 as at their base, provided with numerous conical spines, one larger terminal spine at theu- distal point. 

 (Eesembles Stauralastrmn rhopalophorum, PI. 45, fig. 1, but is distinguished by the different size of 

 the arm-pairs, and by the stronger spines.) 



Dimensions. — Eadius of the principal arms O'o, of the lateral arms 0'2 ; basal breadth 0"04, 

 distal breadth 012. 



Habitat. — Indian Ocean, off Maldive Islands, surface, HaeckeL 



Subgenus 2. Hagiastromma, Haeckel. 

 Definition. — The two longitudinal arms diflerent in size or form. 



3. Hagiastrum mosis, n. sp. (PI. 45, fig. 3). 



Cross rectangular. All four arms nearly isosceles, triangular, at their narrow base half as 

 broad as at their truncated, concavely fluted, distal end. The posterior principal arm with twelve 

 to thirteen joints, twice as long as the anterior arm, which has six to seven joints and is one and a 

 half times as long as the two lateral arms (with four to five joints). 



Dimensions. — Eadius of the posterior arm O'S, of the anterior 015, of the lateral arms 01 ; 

 basal breadth 0"05, terminal breadth 01. 



Habitat. — Mediterranean (Smyrna), surface, Haeckel. 



4. Hagiastnmi mohammedis, n. sp. 



Cross with unequal angles, the anterior little smaller than the posterior. All four arms club- 

 shaped, thorny, three times as broad at their globose distal end as at their narrow base, and 

 furnished with ten to twelve conical spines. Posterior principal arm twice as long as the anterior, 

 and four times as long as the rudimentary lateral arms. 



Dimensions. — Eadius of the posterior arm 0'4, of the anterior 0'2, of the lateral arms 01 ; basal 

 breadth 0-02 to O'OS, distal breadth 0-06 to 01. 



Habitat. — PhUippiue Sea, Samboangan, Station 200, surface. 



5. Hagiastrum christi, n. sp. 



Cross with unequal angles, the anterior somewhat smaller than the posterior. All four arms of 

 similar form, lanceolate, in their middle twice as broad as at either obtuse end. The posterior 



