Aoridae from the Hancock Expedition — Myers 
501 
spine and a group of short spines, inner and 
outer margins each with a single spine; endopo- 
dite inner border with two widely separated 
spines, the most distal of which is the shorter, 
outer border with a solitary spine and a single 
group of short stout terminal spines. T els on 
(Fig. 1 /) longer than broad, the terminal crests 
well developed, each bearing on the dorsal sur- 
face a short stout spine and distal to it a long 
seta. 
female paratypes (Bahia Honda, Pana- 
ma) : Peraeopod 1 with the posterior margin of 
the carpopodite smoothly rounded and no tooth 
on the posterior distal angle; otherwise as female 
M. schmitti. 
TYPE MATERIAL: 21 $ $ , Station 478-35. 
21 $ $ , Station 113-33. 
types: $ 
2$ $ 
18$ $ 
2$ $ 
19$ 2 
Holotype, 
USNM No. 
Paratypes, 
BM No. 
Paratypes, 
USNM No. 
Paratypes, 
BM No. 
Paratypes, 
USNM No. 
112797 
1967:7:2:1-2 
112798 
1967:7:2:3-4 
112799 
distribution: Costa Rica (Salinas Bay), 
Panama (Bahia Honda), Ecuador (Salango 
Island) and Galapagos (Isabela Island). 
Microdeutopus trichopus sp. nov. 
Figs. 2a- g and 6b 
identification: In the development of teeth 
on the posterior margin of the carpopodite and 
propopodite of the first male peraeopod, this 
form resembles Microdeutopus tridens Schell, 
and M. kraemmeri Reid. These two species, how- 
ever, have the carpopodite short and as slender 
as the propopodite and should more correctly 
be attributed to the genus Lembopsis Pearse (see 
also Barnard, 1959). Present material has the 
carpopodite more bulky than the propopodite, 
a feature characteristic of Microdeutopus Costa, 
and, since the specimens agree with no known 
Microdeutopus sp., they are designated as M. 
trichopus sp. nov. 
TABLE 2 
Collections 
STATION 
SPECIES 
forms collected 
113-33 
M. hancocki 
12 $ 
21 $ 
4 immature 
sp. nov. 
N. roosevelti 
1$ 
Shoemaker 
114-33 
N. roosevelti 
30 $ 
36$ 
4 immature 
Shoemaker 
116-33 
A. heteruropus 
1$ 
Barnard 
125-33 
N. roosevelti 
1$ 
Shoemaker 
185-34 
M. trichopus 
3$ 
1$ 
sp. nov. 
187-34 
M. hancocki 
21 $ 
23$ 
4 immature 
sp. nov. 
190-34 
M. trichopus 
35$ 
2$ 
sp. nov. 
204-34 
N. roosevelti 
1$ 
2$ 
Shoemaker 
257-34 
M. schmitti 
1$ 
Shoemaker 
398-35 
M. hancocki 
1$ 
sp. nov. 
460-35 
M. schmitti 
2$ 
Shoemaker 
A. heteruropus 
8$ 
19$ 
Barnard 
N. roosevelti 
2$ 
1$ 
Shoemaker 
461-35 
M. schmitti 
1$ 
Shoemaker 
475-35 
A. oculatus 
2$ 
Barnard 
476-35 
A. oculatus 
2$ 
1$ 
Barnard 
M. schmitti 
2$ 
3$ 
Shoemaker 
477-35 
M. schmitti 
20$ 
43$ 
12 immature 
Shoemaker 
478-35 
M. schmitti 
Shoemaker 
309 $\ 
465 $ 
M. hancocki 
21 $ J 
sp. nov. 
479-35 
M. schmitti 
4$ 
8$ 
1 immature 
Shoemaker 
480-35 
M. schmitti 
6$ 
4$ 
Shoemaker 
481-35 
M. schmitti 
173$ 203 $ 
37 immature 
Shoemaker 
A. oculatus 
1$ 
Barnard 
N. roosevelti 
2$ 
Shoemaker 
564-36 
A. oculatus 
1$ 
Barnard 
