324 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
18), at the top of which the genital duct opens. The present species 
also differs from Ammothea, and agrees with other species of Ammo- 
thella, in the shape of the distal end of the femoral joint, which 
does not run out into a long projection on the dorsal side, though 
it does have a small prominence to which 4s articulated a long hol¬ 
low spine (‘ Kittdrtise,’ Dohrn, ’81, pi. 7, fig. 4). But it is 
especially characterized, as Dohrn has pointed out, by the peculiar 
hollow, club-shaped spines which occur on the chelifori, the caudal 
segment, and the basal joints of the legs. 
Immature specimens have the chelae well developed, one and 
one half times as long as the palm, the fingers slender, curved, 
crossing at the tips, the inner margins bearing a few short teeth. 
This species was taken at Bermuda in 1903 at no place except 
upon the hydroids in the artificial ‘ cut ’ which has been described on 
p. 316. Dohrn had A. appendiculata from Santa Lucia. Bermuda, 
so far as I am aware, is the only other place at which it has been taken. 
Specimens examined. 
Locality. 
No. of specimens. 
Date. 
Source. 
Flatts Inlet.... 
2 J,1 ?, 1 juv. 
17 July, 1903. 
(Coll, by L. J. C.) 
(B. B. S. sta., 1403) 
Flatts Inlet .... 
2 ^(w. eggs), 2$ 
28 July, 1903. 
(Coll, by L. J. C.) 
(B. B. S. sta., 1403) 
‘Bermuda’ .... 
1 juv. 
1901 
Yale univ. museum, 
No. 3362 
(A. E. Ven'ill) 
‘Bermuda ’ . . . . 
1 $ 1 (W. eggs) 
1898 
(A. E. Verrill) 
Ammothella spinifera Cole (:04, p. 275) from San Diego, Cali¬ 
fornia, appears to be rather closely related to A. appendiculata, 
especially as it has similar hollow spines, which, however, taper 
gradually to the end instead of being club-shaped (i. e., larger 
distally). This close similarity was not noticed at the time the 
description of A. spinifera was written. 
‘Prof. A errill’s description of 4 Ammotliea rugulosa ’ was based upon this 
specimen. According to his paper (: 00 , p. 581) it was collected at low tide 
in Bailey’s Bay. 
