CALIFORNIA STALK-EYED CRUSTACEA. Ill 



generally bear appendages; in the male there are often sexual appendages 

 on the first two segments, and the appendages on the three following 

 segments may be well developed or rudimentary; the last pair of append- 

 ages is always well developed and forms, with the telson, a strong tail-fin. 



Genus Munida Leach. 



Carapace rugose, generally spinous, the cardiac area distinctly defined; 

 the infero-lateral regions are not swollen out and are separated from the 

 dorsal surface by a well defined margin. Rostrum slender and styliform, 

 with a supraorbital spine on either side of the base. Ocular peduncles 

 free; eyes normal. Chelipeds and ambulatory legs elongated and slender. 

 One or more of the abdominal segments usually furnished with a series of 

 spinules on the anterior dorsal margin. 



Type. M. rugosa (FABR.). 



This genus is represented off the coast of California 

 by a species Munida (Grimothea) gregaria, the Galatkea 

 gregaria of Fabricius, which still appears to be of uncer- 

 tain systematic position. Miers considers it the young 

 of Munida subrugosa, while Henderson thinks it doubtful 

 that such is the case. 1 Owen 2 reports this species from 

 "off San Francisco." 



Genus Pleuroncodes St. 



Near Munida. Carapace rugose, with the infero-lateral margins swollen 

 out so that the sutures (auomoural lines) are visible from above. Rostrum 

 styliform, with a supraorbital tooth on either side of the base. Ocular 

 peduncles free; eyes large, normal. Insertion of the antennee not con- 

 cealed beneath the antero-lateral angles of the carapace. Merus of the 

 maxillipeds unarmed, the penultimate joint slightly dilated. 



Type. P. monodon (MILNE-EDWARDS). 



1 See Miers' Catalogue of New Zealand Crustacea, p. 168 ; Henderson, Challenger Reports 

 Vol. XXVII, p. 124; and Milne-Edwards and Bouvier, Ann. Sci. Nat. (7),T. XVI, 1894 

 pp. 256 and 314. 



2 Zoology of Beechy's Voyage, Crustacea, 1839, p. 87. 



