424 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Family A TELEC YCLIDA E 



Genus KRAUSSIA Dana, 1852 



Kraussia Dana, Amer. Journ. Sci. and Arts, vol. 13, no. 37, p. 120, 1852. 

 Kraussia Alcock, Journ. Asiatic Soc. Bengal, vol. 68, pt. 2, no. 3, p. 97, 

 1899. 



Carapax paulo transversus, margine postero-laterali breve, fronte 

 denticulatOj medio emarginato. Antennae internae obliquae. Pedes 8 

 postici natatorii, tarso falciformi. Articulus maxillipedis externi 3tius vtx 

 oblong us. (Dana). 



Carapace not much broader than long, not concealing the first three 

 abdominal terga even in the male, subcircular but with the antero-lateral 

 borders much longer than the postero-lateral, and the latter rather 

 strongly convergent and slightly concave : the regions not defined. 



Front well separated from and prominent beyond the inner supra- 

 orbital angles, almost horizontal, cut into two lobes which may, or may 

 not, be again divided into two lobules. 



The antennules fold alongside their basal joint, much nearer the 

 longitudinal than the transverse. 



The basal antenna-joint touches the front and occupies all the space 

 between the antennulary pits and the orbit : the flagellum, which is short 

 and slender, stands in the orbital hiatus. 



Buccal cavern squarish, a little elongate: the external maxillipeds — 

 of which the merus is not elongate — slightly overlap the epistome, which 

 though short and sunken is well enough defined. No ridges on the palate 

 to define the efferent branchial channels. 



Cheliped massive, short and stumpy with particularly stumpy fingers. 



Legs short and stout, ending in blade-like dactyli. 



The abdomen of the male consists of 5 segments, the 3rd-5th terga 

 being fused. 



Sternum narrow. (Alcock) 



The writer follows Rathbun (1911, p. 211) and Balss (Journ. Roy. 

 Soc. Western Australia, vol. 21, 1934-35, p. 132) in assigning the genus 

 Kraussia to the family Atelecyclidae. 



Kraussia amerlcana Garth 

 Plate 73, Figs. 1, 2 



Kraussia americana Garth, Allan Hancock Pac. Exped., vol. 5, no. 2, 

 p. 19, pi. 7, figs. 1-4, 1939. 



Type locality. — Puerto Refugio, Angel de la Guardia Island, Gulf 

 of California. 



