10 
S:\riTHS0NrAN MTSCELI.ANEOUS COET.ECTIONS 
VOE. 98 
Pie uro lie odes plauipes Stini])son 50 ± 
i\1)0iit 1 1 : 00 o’clock at nio'ht, Lt. H. K. ( lates, one of the eiif^ineer 
o o 
officers, called me to the engine room to see a lot of hrigbt red shrimp 
they had discovered in the suction side of one of the condensers 
0]iened for minor re])airs. They ])roved to he the galatheid shrimp, 
P. plauipes, xovy common in Lower California waters at certain 
seasons. At times they occur in such countless numhers that they 
color the water red for great distances. Huge windrows of the dead 
shells of these animals have been observed in the ]iast as consi)icuous 
red streaks along the shore line. Crustaceans of this ty]ie form an 
important whale food and without doubt this speeches ])layed an 
imjiortant ])art in the former abundance of whales in the Loy;er 
Californian and Mexican waters. As noted above, a large black sea 
bass taken in iMagdalena Lay during the day regurgitated several of 
these galatheids when hauled into the boat. 
Socorro Island, Alexico, July 20 (sta. 6-38), shore collecting, 
Braithwaite Bay, at landing place. 
Crangon species i 
CALLIANIDEA LAEVICAUDA OCCIDENTALIS, n. subsp. 
Holotype. — An ovigerous female (U.S.X.M. no. 77788) about 
48 mm. long from rostral ])rojection to end of telson, accom]:)anied 
by a male a])])roximately 35 mm. long and a very small male, ])erhaps 
juvenile, 18 mm. long. The uj^^er margin of hand from ])osterior 
extremity to tip of movable finger measures about 17 mm. in the 
holoty])e and 13 mm. in the larger of the male sj^ecimens. 
Desen pti OIL — About 10 years ago I determined two s])ecimens of 
CalUanidea laevieauda from the Tres Alarias Islands, Alexico. for 
Senor Carlos Stansch, at that time an agent of the Direccion Forestal 
y de Caza y Pesca of Alexico. In those sp.ecimens, as in these from 
Socorro, most, if not all, of tile ])leo])od filaments are two-jointed. 
Aloreover, Pacific s])ecimens of C. laevieauda have the greater ])art 
of the length of the lower margin of the large chela more or less 
toothed or tuherculate and the ridge on the inner side of the fixed 
finger crenulate. Atlantic s])ecimens which I have examined front 
Puerto Rico, Culehra, Barbados, and Curacao Ivcwe the lower margin 
of the large chela only veiA' slightly roughened or, at most, obscurely 
crenulate at about midlength only, whereas the ridge on the inner side 
of the fixed finger is smooth. ( )therwise, there seems to he little 
difference between the two forms, and such differences as I Ivdxe 
