CLIPPERTON ISLAND DECAPODS—CHACE 617 
character was the number of segments in the carpus of the second 
pereiopod: 18 in P. paucirostris, 11 in P. hawaiensis. Wdmondson’s 
count was based on the right second pereiopod (he stated in 1946 that 
the one on the left side was not observed) ; Dana did not indicate which 
of the second pereiopods was examined. In the series of Clipperton 
specimens, there are from 17 to 19 segments (very difficult to deter- 
mine in the smallest specimens) in the carpus of the right second pereio- 
pod, and 11 to 13 (usually 11) in the carpus of the left member of the 
pair. Inasmuch as P. hawaiensis and P. paucirostris agree in most 
other characters, including an unusual rostrum for the genus, it seems 
logical to assume that they are synonymous. In all of the Clipperton 
specimens, the right first pereiopod is chelate, the left simple. 
DistRiBUTION: Known previously only from the Hawaiian Islands. 
Family Palinuridae 
Panulirus penicillatus (Olivier) 
Astacus penicillatus Olivier, 1791, p. 343. 
Panulirus penicillatus Boone, 1935, p. 67, text-fig. 2, pl. 17.—Holthuis, 1946, p. 
125. 
Mareriau: Coral reef, intertidal; August 1958; E. S. Reese; 1 
male.—Northeast side, dead on beach; September 14, 1958; C. Lim- 
baugh; 1 male.—West side, on beach; September 21, 1958; C. Lim- 
baugh; 1 cast shell of male. 
MEASUREMENTs: Carapace lengths in dorsal midline, 25.0-48.5 mm. 
DistrisuTIon: Red Sea and South Africa to Hawaiian, Tuamotu, 
Socorro, Cocos, and Galapagos Islands. 
Family Callianassidae: Subfamily Callianassinae 
Callianassa (Callichirus) placida De Man 
Callianassa placida De Man, 1905, p. 612. 
Glypturus grandimanus Balss, 1924, p. 179, figs. 3, 4. Not Callianassa grandi- 
mana Gibbes, 1850. 
Callianassa (Callichirus) placida De Man, 1928, p. 171, pl. 18, figs. 29-29b, pl. 19, 
figs. 29c—29e. 
Callianassa hartmeyeri Schmitt, 1935, p. 3.—Hult, 1938, p. 7, figs. 1-4, pl. 1.— 
Schmitt, 1939, p. 15. 
Callianassa (Callichirus) oahuensis Edmondson, 1944, p. 56, fig. 10. 
Mareriau: Northwest shore, rocks south of landing place; July 21, 
1938; Sta. 9; W. L. Schmitt; 1 male, 1 ovigerous female.—Northwest 
corner, reef, coral cobble beach; August 14, 1958; Sta. W58-288; 
Reese, Baldwin, and Wintersteen; 1 female.—East end, coral reef; 
August 15, 1958; Sta. W58-289; Reese, Baldwin, and Wintersteen; 1 
ovigerous female.—South shore, coral reef; August 19, 1958; Sta. W58— 
295; Reese, Baldwin, and Limbaugh; 1 ovigerous female.—Northeast 
