30 PROCEEDINGS OF THE CALIFORNIA 



European or Atlantic coast species, and none from South America, Australia 

 or Africa, have yet reached us. 



I have purposely made my technical descriptions short, giving only those 

 salient characteristics which distinguish the species, but it is my hope to sup- 

 plement these descriptions by a series of photographs of the new forms — a 

 hope warranted by the present financially satisfactory state of this institution. 



Inachus tuberculatus. 



Rostrum, short, entire; pre-orbital spine marked only by the angle of the 

 orbit; post-orbital spine slightly longer than the eyes; medial region of 

 carapace with several small tubercles; posterior, with a large central tubercle 

 surrounded by a ring of smaller tubercles; postero-lateral regions, with sev- 

 eral small tubercles; all the regions prominent and separated by well marked 

 depressions; three last joints of first pair of feet with scattered tubercles, 

 manus stout; second pair of legs 2% times the length of the post-rostral part 

 of the carapace; sternum and abdomen with scattered tubercles. 



Dimensions of two specimens: 



Length. Width. Length of 2d pair. 



Male 0.75 0.55 1.55 



Female 0.56 0.38 0.94 



Dredged in eight fathoms, upon a rocky bottom covered with weeds, at the 

 mouth of San Diego Bay, by Henry Hemphill. This, and the following 

 species, are the first examples of the macropodidue found on the California 

 coast. 



Microrhy nch us Hemph illii . 



Rostrum, short, entire; form of carapace, long and narrow triangular; 

 post-orbital spine, small; antero-lateral margin marked by a line of hairs; 

 1st pair of legs short, the meros extending to the line of the eyes; 2d pair, 

 more than three times the length of the post-rostral part of carapace; 3J, 4th, 

 and 5th pairs diminishing in length, the last a little less than twice the length 

 of post-rostral part of carapace. A few scattered hairs on the two last joints 

 of the four hinder pairs of legs, especially on the fourth joint. 



A single male specimen of this species was dredged, in seven fathoms of 

 water, in the Bay of San Diego. Length, 0.75; width, 0.33; length of 2d pair 

 of legs almost two inches. 



Pisoides? tumidus. 



Rostrum, bifid, moderately long; no pre-orbital spine; postrorbital spine 

 small ; first joint of external antennae very wide, prolonged into a point ex- 

 ternally. 1st and 2d pair of legs about equal in length; hand of first pair, 

 stoutish; fingers gaping when closed, the ends toothed and fitting neatly 

 together; a large tubercle on movable finger in the centre of the gaping part. 

 Carapace, with the regions tumid and spineless, smooth and rounded behind. 

 A single specimen, male, was found between tides, near San Diego. The 

 whole of the carapace and feet are covered with a short pubescence, becoming 



