MUSEUM OF COMPARATIVE ZOOLOGY. 203 
Famitry MEGATHYRID. 
Genus MEGATHYRIS D’Ozzienry. 
Surcenus CISTELLA Gray. 
Cistella Barrettiana Davivsoy, var. rubrotincta Dat. 
Cistella Barrettiana Dall, Bull. M. C. Z., IX. pp. 103, 104. 
Argiope Barrettiana Davidson, P. Z. S., Feb. 1866, p. 103, pl. xii. fig. 3. 
Argiope antillarum Crosse & Fischer, Journ. de Conchyl., XIV., July, 1866, p. 270, 
pl. viii. fig. 6. 
Cistella (Schrammi var.?) rubrotincta Dall, Bull. M. C. Z., III. p. 19, pl. i. fig. 6, 1874. 
Habitat. Sand Key, 80 fms.; Station 2, 805 fms.; Yucatan Strait, 640 
fms. ; Station 45, 101 fms.; Station 20, 220 fms. ; Barbados, 100 fms.; Sigs- 
bee, off Havana, 450 fms. ; Station 276, 94 fms.; Station 231, St. Vincent, 95 
fms. ; Tortugas, 43 fms.; Station 297, 170 fms., off Grenada; Station 132, 115 
fms., Santa Cruz; Station 155, 88 fms., near Montserrat, W. I. 
This pretty little species has about the same range in depth and temperature 
as T, Cailleti. The above synonymy represents the conclusions of Mr. David- 
son and myself, after several years of correspondence and the study of quite 
abundant material. 
Cistella (Barrettiana var.?) Schrammi Crossr & Fiscner, 
Cistella (Barrettiana (2) var.) Schrammi, Bull. M. C. Z., IX. p. 104. 
Argiope Schrammi, Crosse & Fischer, 1. c., p. 269, pl. viii. fig. 6, 1866. 
Habitat. Station 45, 101 fms.; Barbados, 100 fms. 
There is much doubt as to the distinctness of this form from C. Barrettiana, 
which seems very variable in sculpture and color. 
Cistella lutea Datu. 
Cistella lutea Dall, Bull. M. C. Z., IIT. p. 20, pl. i. fig. 5, pl. ii. figs. 4-8, 1871; 
Ibid., IX. p. 103. 
Habitat. Sigsbee, off Havana, 80 to 127 fms.; Barbados, 100 fms.; Station 
21, 287 fms.; Tortugas, 30 fms. 
Owing to the differences in the form of the shell and especially of the sep- 
tum, Mr. Davidson was inclined to regard this as a valid species, and so stated 
in his last communication on this subject. It may, however, be only an 
extreme form of Barrettiana, though intermediate specimens are still wanting. 
