part 1 garth: pacific oxyrhyncha 321 



Measurements: Male lectotype: length 37 [not 41] mm, width 

 without spines 39 mm, with spines 44 mm, rostrum 2.0 mm, width 6.0 

 mm, cheliped 41 mm, last walking leg (only one still attached) 46 mm. 

 Ovigerous female, paratype : length 26.6 mm, width without spines 26.4 

 mm, with spines 36.6 mm, rostrum 1.0 mm, width 2.0 mm, cheliped 

 20.3 mm, chela 8.2 mm, dactyl 4.1 mm, ambulatory legs 32.4, 37.6, 

 34.7, and mm, respectively. 



Color in life: Unknown. 



Habitat: Black sand, shell, and mud; nullipores. 



Depth: 5-11 fathoms. 



Size and sex: The Hancock series includes males of 10.0 and 10.8 

 mm, the 26.6 mm ovigerous female paratype, and young to as small as 

 4.0 mm. 



Breeding: The single ovigerous female was encountered by the Velero 

 HI off Guatemala in early January. 



Remarks: The writer is indebted to Miss A. M. Buitendijk of the 

 Royal Netherlands Museum for the privilege of examining a male speci- 

 men from Macapule, Sinaloa, one of a pair sent her for identification by 

 Dr. F. Bonet of the National School of Biological Sciences in Mexico 

 City, and for the suggestion that it might be related to the Old World 

 genus Doclea. With this specimen and information it was possible to 

 combine the small series of immature males and one mature female in 

 the collections of the Allan Hancock Foundation and to establish a New 

 World genus differing from Doclea in the following particulars: 



1. The rostrum is short and simple; in Doclea it may be short, but 

 is always double. 



2. The outer angle of the buccal cavity is unarmed ; in Doclea it is 

 marked by a spine or tubercle. 



3. The merus of the outer maxilliped is narrower than the ischium 

 and tapers distally; in Doclea it is broader than the ischium and the 

 anterior angle is often produced. 



4. The form of the male first pleopod (see Plate T, fig. 1) resem- 

 bles that of Libinia; it is strikingly different from that of Doclea 

 canalifera Stimpson, of which specimens from Japan (U.S.N.M. No. 

 26271) identified by M. J. Rathbun were examined by the writer. 



Because of the importance attached to the last mentioned character, 

 it was decided that the new species and type of the new genus should 

 rest upon the mature male specimen, herein designated as lectotype, and 

 that the description should be prepared by Miss Buitendijk, who in 

 Leiden had available for comparison a number of Doclea species from 

 the Sunda Islands region. 



