PYCNOGONIDS 277 
Remarks.—The 3-jointed chelifori, the g-jointed palpi, and the absence 
of a marked protuberance on the dorsodistal extremity of the femoral 
joint clearly relate this form to 4. ¢uderculata, and to those forms which 
I have placed with it in the genus Ammothella, viz., three species from 
the Gulf of Naples (see ‘ Remarks,’ p. 273). 
The two mature specimens of this lot were both females with ova in 
various stages of development in the second and third coxal and femoral 
joints of the legs. 
The species is well characterized by the long eye tubercle and the 
longer, spiny, elevated, and curved caudal segment, the spines on the 
dorsal surface of the body, and the long, slender spines of the legs. 
Genus Tanystylum Miers (’79). 
Trunk broad; lateral processes comparatively short and closely 
crowded, making the body disciform; segmentation suppressed. Cheli- 
fori usually mere 1-jointed knobs; sometimes 2-jointed; chelate in 
immature specimens. Palpi with 6 or 7 joints; first and third joints 
short, second and fourth longer. Femoral joint of legs of female con- 
siderably swollen. Openings of oviducts in usual position on all four 
legs. Openings of the genital ducts of the male not upon genital pro- 
tuberances. 
Remarks.—The genus Zanysty/um is undoubtedly very closely related 
to Ammothea, but differs in several important respects. I was at first 
inclined to include C/ofenia with this genus, as Schimkewitsch has done 
(Schimkewitsch, ’89), but in view of the highly concentrated body,! 
closely approximated eye tubercle and caudal segment, 4-jointed 
palpi, and male genital openings in the second as well as the third and 
fourth pairs of legs, I think it may well be left, for the present at least, 
as a separate genus. 
The species which I have here called Zanystylum intermedium differs 
from previously described species of the genus in having 2-jointed che- 
lifori, and from all but Z: chierchie Schimkewitsch (’89, p. 333) in 
having 7-jointed palpi instead of 6-jointed. It is, however, so similar 
in other respects that a separation into another genus does not seem 
justifiable. 
Discoarachne brevipes Hoek (?814, p. 74) is undoubtedly very closely 
related to the forms under discussion, and perhaps should be classed as a 
species of Zanystylum, 
1Dohrn (’81, p. 162) well says: ‘‘ Dieses Thier [Clotenia conirostris] hat die bei 
weitem concentrirteste Gestalt aller Pantopoden, die ich kenne.” 
