Poiiiiinii College, Claremont, California 39 



upturned hooks for gripping objects carried on their backs. And the dorsal surface 

 of the carapace is reduced to a plane. Figs. 9 and 1(1. 



Inachnulcs magdalenensis Rathbuii 

 But few of these were taken. They are not so much given to decoration as some 

 others of the Spider Crabs. We found them in 12-15 fathoms of water. The 

 carapace and legs are set with numerous clumps of stiff hooked hairs. Figs. 11 and 

 12 represent male and female respectively. 



Ilf/nie/ytipsiu itrcijonensis (Dana) 

 This species was found in abundance on the mud flats at Balboa. One specimen 

 was dredged at from 12-15 fathoms, probably carried out by the current from the 

 bay. Fig. 13. 



I'oJochela /lem/i/iilli (Lockington) 

 This species was fairly coiiimon among the masses of red seaweed dredged from 

 a depth of 1(1-20 fathoms. They are marked with reddish brown, but are always 

 so covered over with decorative fragments of seaweed that even their form is almost 

 indistinguishable. In the aquarium these creatures were very interesting. Their 

 principal occupation was that of the decorating of themselves. Seizing a fragment 

 near one end, that end was thrust into the mouth and chewed for sotne time, then 

 transferred to some part of the carapace or legs, and by means of a peculiar and 

 oft repeated twisting movement of the hand it was so firmly fastened that it would 

 under almost all circumstances remain in the position in whicli it had been placed. 

 The chewing led us to suspect a cementing element in the saliva, but on examination 

 of the carapace it was found that each piece of seaweed was impaled on several of 

 tlic stiff recurved hairs which occur in clumps over the carapace and legs. Fig. 14 

 represents an adult female carrying eggs. 



Et>ittllus hilii/in< ii/iiliis Milne Edw. 

 ()nl\ two wei'e taken during the sununer. Fig. 15 is from a male specimen. 



(^ycloxanlhops noi'emJentulus Lock 

 A better idea of the adult of this species can be obtained by consulting Dr. 

 Hilton's paper in this journal f(n- June, 1916. In Fig 16, a and b, show some of the 

 many very striking and deceptive variations which occur in the young. The dotted 

 lines show the distribution of red pigment in the almost clear white carapaces of 

 these two specimens. It gives them a very unusual appearance for the usual color 

 is a uniform dull brown (sometimes purplish) with black claws. These crabs mav 

 be found at medium low tide by tearing apart the rocks which ha\e been cemented 

 together by marine worms, mollusks, etc. The carapace of an adult male measured 

 more than eight cm. in width. 



I'tiiliyi hvlcs //(ilosrrii IIS Schmitt 

 Whatever respect Nature has for proportion and symmetry must have been laid 

 aside while this species was being formed. It is indeed hard to imagine a more 

 awkward looking pair of chelipeds than it possesses. Vet it seems to handle them with 

 some degree of success. They serve as an efficient means of protection of tlie nature 

 of a lid for the cavities in sponges, stones, etc., in which tliese crabs are usuallv 



