240 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
Ficure 37.—Endets spinosa (Montagu). 
Seas (Crimea) and the Azores; Santos Bay and Rio de Janeiro, 
Brazil. On the North American coast it is apparently common in 
the Tortugas region. Its occurrence at Woods Hole is sporadic 
(Cole). The mid-Atlantic records are charted on figures 6 and 7 and 
will be found in Appendix Table 3. There is one doubtful record 
from Arctic waters (Schimkewitsch, 1891, p. 514). It is represented 
in the Woods Hole Oceanographic Institution fouling collections 
from Panama to Block Island, including the Bahamas, but it is not 
yet reported from Texas or Louisiana. 
Family AMMOTHEIDAE Dohrn, 1881 
A family of heterogeneous appearing forms, from the small com- 
pact species of Achelia to the large spectacular Ascorhynchus armatus. 
Ovigers are present in both sexes, 9- to 10-jointed. Chelifores and 
palpi present, chelae usually subchelate; palpi 6- to 10-jointed, usually 
8- or 9-jointed. At least eight genera are represented in American 
waters, and the mysterious Calypsopycnon is also included in the key. 
1. Palpi usually more than 7-jointed; chelifores shorter than proboscis, with 
sminilor rudimentary chelaeio oso ye) Set ec ae Ue ee 2 
Palpi 7-jointed; chelifores longer than proboscis, with large chelae opposed 
PNSPOUGsOlgmM OUP Nay tac: 2 le ate ee ee ae Paranymphon (p. 253) 
2. Propodus intermediate, i. e., without heel and large basal spines and auxiliary 
claws; proboscis conspicuously large, usually carried ventrally_______---- 3 
Propodus with basal spines and usually with auxiliary claws (except Ephyro- 
gymna); proboscis not conspicuously large_____------------------------ 6 
3. Proboscis pyriform or cylindrical but not on a jointed petiole; without large 
spines on eye tubercle or abdomen. -_-._-___=--2225----2-224-2 242-2 2L- 4 
Proboscis pyriform, on a jointed petiole; prominent spines on eye tubercle 
DFO Wak] So (6 eS) 0 ig MeN AE ND RY SE ENS SER aT eS Eurycyde (p. 260) 
4. Proboscis straight, cylindrical; chelae well developed______--_------------- 5 
Proboscis pyriform, carried ventrally, chelae small or rudimentary. 
Ascorhynchus (p. 253) 
5. Scape 1-jointed, trumpet-shaped; terminal claws very long. 
Calypsopycnon (p. 263) 
Scape 2-jointed, chelae large, fingers bowed; terminal claws short. 
Heterofragilia (p. 262) 
6. Tibiae without spiny tubercles; scape of chelifores not trumpet-shaped_-- ---- if 
Tibiae with two rows of tall spinous tubercles; scape trumpet-shaped. 
Nymphopsis (p. 249) 
