COLE: PYCNOGONIDA COLLECTED AT BERMUDA. 
323 
by Verrill is not tenable, as the forms described under it were 
merely the adults of Ammothea. 
Ammothella appendiculata (Dohrn). 
PI. 21 , fig. 15-18 ; pi. 22 , figs. 19, 20. 
Ammothea appendiculata Dohrn, '81, p. 152-155, pi. 7, fig. 1-5. 
Ammothea (?) [subgenus Ammothellai] rugulosa Verrill, : 00, p. 
581, pi. 70, fig. 9. 
Although Verrill describes this species as new, I am unable, after 
comparison with the excellent description of A. appendiculata 
given by Dohrn, to separate it from that species. The greatest dis¬ 
crepancy is in the statement that the palpi are 10-jointed. Verrill 
in his description of the Bermuda form also gives ten as the number 
of the joints in the palpi. While I hesitate to question the observa¬ 
tions of two such eminent naturalists, nevertheless I am certain 
from my study of the specimens collected at Bermuda this summer 
and of Professor Verrill’s type that these have but nine joints in 
the palpi; and since it is easy for one to miscount in these cases, as 
I have shown above, it seems to me not unlikely, considering the 
close agreement in other respects, that Dr. Dohrn may also have 
made out one too many joints in these much abused appendages. 
When I first examined the specimen which Professor Verrill so 
generously placed at my service, I also counted ten joints, but hav¬ 
ing previously made drawings from palpi of this species mounted 
separately on slides so that they lay out fiat, and having dis¬ 
tinguished but nine joints, I examined the specimen more critically 
and found that what I had counted as joints four and five was in 
reality only one joint, as there was neither a complete chitinous 
constriction nor were there muscles at this place (see pi. 22, fig. 19). 
The other differences are very slight. I find, for example, a few 
spines on the lateral processes, and the division between the first and 
second segments of the trunk well marked on the ventral side. 
Dohrn remarks (p. 155) that the genital openings are not situated 
upon special projections. This is eminently true of the males, in 
which they differ from Ammothea, but in the females I find a slight 
prominence at the distal end of the second coxal joint (pi. 21, figs. 17, 
