Pomona College, Claremont, California 41 



found. The chelipeds are very rough and the organic growth which covers them 

 renders them difficult to detect from the surroundings. Fig. 18 gives a good idea of 

 their form. 



P. rudis Stimp. 

 This has the right claw large. 



Herbstia parvifrons Rand 



Only three, two adults and one young, of these were taken during the summti, 

 but on a visit to the same beach in November I found them very numerous under 

 stones at medium low tide. All were young, however. Figs. 19 and 20 show the 

 adult male, and young. 



Pelia clausa Rath. 



Fig. 21 shows an adult with legs extended, a position in which it is seldom 

 found. These sluggish creatures live under stones at low tide and if found at all 

 usually have their legs closely folded to them. The entire animal is covered by a 

 dense coat of organic growth. 



Lop/iopanopeus leucomanus Lock. 



This species mentioned in Prof. Hilton's paper is figured herewith. Fig. 22 is 

 an adult female. Fig. 23 is young. This species, though generally of a uniform dull 

 brownish color, shows in the young many variations. The carapace is often marked 

 with blackish or white patches of various patterns. Fig. 24 is illustrative of this. 

 Within the dotted lines was very dark pigment, while the lateral patches were almost 

 white. 



Pugettia dalli Rath. 



Common in 5-20 fathoms. This species exhibits great variation as is shown by 

 the accompanying figures. Figs. 25 and 26 are adult males. Figs. 27 and 28 are 

 adult females. They vary greatly in color and are generally decorated more or less. 

 Fig. 29 illustrates a specimen which was determined, by the U. S. Museum, as a 

 variety of this species. The carapace of P. dalli is always set with stiff recurved 

 hairs, of which there are two rows on the rostral spines and other scattered singly 

 or in groups over the carapace and legs. 



Pugettia richii Dana 

 Fig. 30 represents an adult female. But few of these were taken. 



Pinnixa longipes Lock. 

 This very odd looking little crab inhabits the sand tubes of Clymenella, which 

 are very abundant on the sand bars exposed at low tide near the outlet of Balboa 

 Bay. One or two of the crabs were found in almost every tube examined which con- 

 tained a worm. The very peculiar form into which this species has developed, as 

 shown in Fig. 31, fits admirably for this commensal life. 



Pinnixa littoralis Holmes 

 The only specimen was an imperfect one shown in Fig. 32. It was found clinging 

 to the outside of the slime tube of Cerianthus in Balboa Bay. 



Cancer antennarius Stimp. 

 Fig. 33 represents a young specimen, 4 cm. in width. The hairiness of the carapace 

 is in marked contrast to the smooth condition of adults. Drawn bv Esther Funk. 



