Hawaiian Crangonidae — BANNER 
5 
175 * 
165 * 
55* 
30* 
Kure 
20 * 
Midway 
179* 
Pearl and flermcs Kecf 
I 
Lisianski , 
. Laysan 
Maro Reef 
— N 
Raiia Dank 
Gardner Pinnaele? 
Necker 
"French Friga'tc Shoal 
300 Nautical Miles 
Nihoa 
Niihau^ 
Kaula 
Kauai 
Oahu 
Molokai 
Lanai»Jf^Ma 
Kahoola we 
•Hawaii 
m 
160* 
Fig. 1. Map of the Hawaiian Archipelago, showing principal islands, reefs, and shoals. 
these ratios to two or more significant places, 
but in most cases the figures are rounded to 
the first significant place (for example, 10 : 
7 : 5 : 5 : 7) because so much variation was 
found in the relative lengths of the articles 
within one species that it is felt that any fur- 
ther refinement of figures would be scientifi- 
cally inaccurate. The measurements of the tel- 
son are self-evident. Throughout the study, 
fractions are expressed as their decimal equiv- 
alents and rounded with the exception of one 
fourth and three fourths. 
Acknowledgments 
I wish to thank the following institutions 
and individuals for their assistance in this 
work: The Bernice P. Bishop Museum; the 
United States National Museum; Dr. C. H. 
Edmondson, Professor Emeritus of the Uni- 
versity of Hawaii and Curator of Zoology at 
the Bernice P. Bishop Museum, for his help 
and cooperation in all phases of the work, es- 
pecially during the initial year’s study; Dr. R. 
W. Hiatt, Professor of Zoology at the Uni- 
versity of Hawaii, for the use of collections of 
the shrimp made by him; Dr. Fenner A. Chace, 
Jr., of the United States National Museum for 
his cooperation and advice on several points; 
and Dr. L. D. Tuthill, Editor of Pacific Science, 
for advice on several taxonomic points. 
I also wish to acknowledge the help of the 
following artists employed by the University 
of Hawaii. Miss Inger Achton drew Figures 
6^-/, j-l. Mrs. Florence Lambeth drew Fig- 
ures 14^-^ , \ld-e, l^a-d, /, /, j, m, and 24 
a-h. Evan I. Gillespie drew the frontispiece, 
redrew Figures 1, 12^-c, A2a-h from their 
original sources, and completed the following 
drawings after I had delineated them: Fig- 
ures 16 a-j; lla-c,f-j; 18^, g, h, k, 1; I9a-g; 
20a-m; l)Aa-i; 37 ; Alg-h; Aha-k; AAa-l; 45 
a-g; A6a-i; Ala-k; A^a-h; 50^-/. 
DISTRIBUTION 
The members of the family Crangonidae 
are commonly circumtropical in distribution 
although in the Pacific Ocean they have been 
reported from as far north as Sitka, Alaska 
{Betaeus harrimani Rathbun, 1910), and as far 
south as Hermite Island, Tierra del Fuego {Be- 
taeus truncatus Dana, 1852). The center of dis- 
tribution for the family in the Pacific appears 
to be the East Indian Archipelago, from which 
de Man (1911) reported 113 species and 20 
