Vernll, JVotes oh RadUita. 435 



polyp-spindles are mostly small, short spindles, very uneqnally and 

 roughly warted ; others are more slender and very small spindles ; 

 others are longer, slender, not very acute spindles, with more dis- 

 tant warts. 



The longer spindles measure l-;)5""" by •325""", 1-25 by -175, l'22bv 

 •250, 1-22 by -175, MY by -275, IMS by -175, 1-12 by "275, l-07by -200, 

 1-05 by -250, TOO by '250, -950 by -250, -950 by -225, -950 by -151), '925 

 by -250, -925 by -225, ^900 by '200, '875 by -225, -850 by "225, "750 by 

 •175, -725 by -225, "725 by -175, -725 by -150, -GOO by -100; the stout 

 spindles 1-45 by -450, l-;32 by -375, 1-17 by ^400, Mo by -300, 1-12 by 

 •275, 1-10 by -425, 1-05 by -325, '975 by -300, "925 by -350, '900 by •SSO, 

 •850 by -300, -850 by -275, ^800 by -225, '775 by ^275, '775 by '225, '750 

 by -300, -750 by -250, ^700 by -250, -675 by ^300, •UoO by -200, -425 by 

 •250 ; the irregular stout spicula -950 by -450, •9-'5 by -350, -800 by 

 •300, -775 by -375, '725 by -350, ^700 by -300, •65u by •300, -600 by ^325, 

 •525 by ^275, ^425 by ^275, ^400 by -250, ^350 by -225; the polyp-spin- 

 dles ^450 by •lOO, '425 by •lOO, -41)0 by •100, -375 by ^125, -350 by •I 12, 

 •350 by ^062, ^325 by '112, •325 by ^087 "300 by •lOo, -300 by -075, -300 

 by ^050, -275 by ^062, ^225 by -(11)2, -175 by •OYS. 



Zorritos, Peru, dredged in 3 fathoms, — F, H. Bradley. 



This species resembles M. albida in color and size of branches, but 

 has not the appressed verrucse, with a flattened lower lip, of that spe- 

 cies, and the spicula of the verrucse are much longer, sharper, and more 

 projecting, while all the spicula are much less roughly warted. It 

 somewhat resembles M. squarrosa in size and mode of branching and 

 in the divaricate verrucas, but difters in the elongated lower lip and 

 much stouter spindles of the verrucse, as Avell as in color. It also 

 bears some resemblance to the whitish variety of M. tubigera, but has 

 smaller branches, shorter verrucse, with a well-marked lower lip, and 

 much shorter and stouter spicula. 



The Zorritos specimen is infested by a small parasitic worm, which 

 forms numerous tubes in the coenenchyma and surface of the axis. 

 When living "from each tube are protruded a pair of long, slender, 

 flexible tentacles, zoned with black and white, and a long, worm-like 

 process, mammillated on both sides, and showing a dark line (intes- 

 tine ?) in the centre." 



These worms are about a quarter of an inch long and quite slender, 

 ■v\dth small bundles of setse along the sides, the posterior extremity 

 tapering. In alcohol' the tentacles are relatively large, with large 

 dark broT\Ti spots, arranged in pairs along the whole length, producing 

 the "zoned" appearance. Each worm has two holes at the surface 



