3O TRUE CRABS OF MONTEREY BAY 



Pugettia richii Dana. 

 Plate IV, fig. ii. 



Pugettia richii Dana, Am. Journ. Sci. (2), xi, 268, 1851. Holmes, Occas. Papers 

 Calif. Acad. Sci., vii, 24, 1900, and synonymy. Rathbun, H. A. E., x, 173, 1904. 



A series of about 50, though showing considerable variation, cor- 

 responds well with Holmes's description. The females differ from the 

 males in possessing a more tumid carapace and less prominent lateral 

 teeth though there is considerable variation among the males in these 

 respects, and the young males often closely resemble the females. The 

 abdomen in young females is much narrower than in the adult form. 



This species, the most common spider crab of Monterey Bay, is found 

 abundantly between tides, usually where there is a growth of algae or 

 coralline in company with young Epialtus productus which it resembles 

 in habit, being slow of motion and clinging tenaciously to the seaweed 

 when disturbed. The young, together with those of numerous other 

 species, are found among the roots of the eel-grass often in the burrows nt" 

 the pistol-crab (Crangon) which abound in these situations. Specimens 

 were also obtained by dredging in shallow water 5 to 15 fathoms. It 

 is frequently much overgrown with hydroids and coralline. 



Color in life red, varying from bright to dark and often closely match- 

 ing certain of the encrusting corallines. In alcohol the color fades to a 

 dull tan. 



The largest specimen in the collection is a male measuring 40 mm. 

 from tip of rostrum to back of carapace and 30 mm. in width between the 

 tips of the posterior teeth (25 mm. between their bases). 



Egg-bearing females were obtained in June, July and in the early 

 part of January. 



Genus MIMULUS Stimpson. 



Mimulus Stimpson, Ann. N. Y. Lye. Nat. Hist., vii, 200, 1860 (Type Mimulus folia- 

 tus Stimpson). 



Mimulus foliatus Stimpson. 

 Plate IV, figs. 12-13. 



Mimulus foliatus Stimpson, Ann. N. Y. Lye. Nat. Hist., vii, 200, pi. iii, fig. i, 1860. 

 Holmes, Occas. Papers Calif. Acad. Sci., vii, 23, 1900, and synonymy. Rathbun, 

 H. A. E., x, 173, 1904. 



Represented in the collection by numerous specimens, mostly young, 



