Clark — On the Type Specimen of Alecto Purpurea. 97 



Alecto purpurea J. Miiller. 



Alecto purpurea J. ^Iui.i.er, Wiegmann's Archiv fiir Naturgesch., 1843, 

 I, p. 132 (New Holland). 



Centrodorsal a small thin disk, with the sliglitly concave dorsal pole 

 about 1 mm. in diameter. 



Cirri broken; ten cirrus stumps remain, the longest 5.5 mm. long with 

 ten segments, the first short, the remainder about one-third broader than 

 long. The cirri are segregated in the interradial angles of the centro- 

 dorsal . 



Radials very short, just appearing beyond the centnidorsal ; i Bri and 

 I Br2 very closely united, appearing externally as if united l)y syzygy, 

 when taken together broadly pentagonal, twice as broad as long; i Bri 

 laterally united; i Br2 (axillary) triangular, the lateral angles not in 

 aijpositioii. 



Alecto purpurea J. Miller; the type in the Berlin Museum. 



Ten arms 70 mm. long; first two brachials tmited by what appears to 

 be a perfect syzygy, forming a wedge shaped pair about twice as broad as 

 long in the median line; the first l^rachial is short with its proximal and 

 distal edges parallel, and the second is triangular, twice as broad as the 

 exterior length; third and fourth ])rachials united by syzygy, forming a 

 short nearly oblong pair about twice as broad as the maximinn length; 

 following three brachials short, slightly wedge shaped, nearly three times 

 as broad as long, the following becoming triangular, twice as broad as 

 long, with the anterior edge slightly concave and the exterior slightly 

 convex. The V)rachials gradually increase in length distally, and in the 

 outer part of the arm become wedge shaped, and distally about as long as 

 broad. In the median line of the dorsal surface of the arm there runs a 

 narrow low rounded carination which is rather prominent and is continued 

 to the arm tip. The arms increase slightly in diameter to the twelfth or 



