Metabetaeus — Banner and Banner 
303 
they were never seen attacking other shrimp. 
When the senior author stood bare-legged in 
the pool while collecting, shrimp settled on his 
leg and produced a feeling similar to a gentle 
rasping rather than pinching. In the food groove 
between the bases of the thoracic legs and 
among other mouth parts were found sand and 
detritus. Therefore, they are presumed to be 
other than carnivorous. 
Coutiere remarked that in his specimens of 
M. minutus there were spots similar in color 
to the mandibular spots found about the gill 
chambers and other parts; he suggested that 
they were caused by symbiotic zooxanthellae. 
In none of these specimens of either species 
were there spots other than the mandibular 
spots and the normal red chromatophor es ; more- 
over, in view of the habit of these shrimp, 
of living in darkness or semidarkness, it is 
unlikely that they would have an association 
with symbiotic algae. 
REFERENCES 
Banner, Albert H. 1957. Contributions to the 
knowledge of the Alpheid shrimp of the 
Pacific Ocean, Part II. Collection from Arno 
Atoll, Marshall Islands. Pacif. Sci. 11(2): 
190-206, figs. 1-5, table 1. 
Borradaile, L. A. 1898. On some crustaceans 
from the South Pacific, III. Macrura. Zool. 
Soc. London Proc. 1898: 1000-1015, pis. 
63-65. 
Coutiere, H. 1899. Sur le genre Metabetaeus 
Borradaile. Soc. Ent. Fr. Bull. (19) : 374-377. 
RATHBUN, Mary J. 1906. The Brachyura and 
Macrura of the Hawaiian Islands. U. S. Fish 
Comm. Bull, (for 1903), (3): 827-930, 
pis. I-XXIV. 
WHITELEGGE, T. 1897. Atoll of Funafuti: Zool- 
ogy . . . from collection of Mr. Charles Hed- 
ley. Aust. Mus. Mem. 3(2): 127-151, pis. 
6-7. 
