PEREZ FARFANTE; REVISION OF GENUS PSEUDARISTEUS 



1.15-1.25 CL, moderately deep and convex basally, 

 styliform and slightly upturned anteriorly, but occa- 

 sionally with apical extremity curving downward. 

 Rostral plus epigastric teeth 3; rostral teeth, situ- 

 ated variably in males, basally in females. Adrostral 

 carina strong, in males with short rostrum almost 

 reaching apex, in females and in male with long 

 rostrum extending just anterior to second tooth. 

 Antennal spine sharp; branchiostegal spine longer 

 than antennal, acutely pointed. Cervical sulcus 

 crossing postrostal carina (rarely only reaching it) 

 at about 0.45 CL from orbital margin, with ventral 

 part turning anteriorly; accompanying carina blunt, 

 except for sharp, strongly arched ventral extrem- 

 ity; postcervical sulcus reaching, but not crossing, 

 postrostral carina at about 0.7 CL from orbital 

 margin. Postrostral carina, extending 0.8-0.9 CL 

 from orbital margin, well marked and sharp to cer- 

 vical sulcus, low and blunt posteriorly, followed by 

 small tubercle situated near posterior margin of 

 carapace. Anterolateral carina lacking; gastro- 

 orbital carina strong; antennal carina relatively 



short; branchiostegal-hepatic carina long, raised and 

 sharp. Orbito-antennal sulcus shallow; deep hepatic 

 sulcus fusing with branchiocardiac sulcus before 

 turning obliquely almost ventrad, forming small 

 branch nearly reaching margin of branchiostegite; 

 branchiocardiac sulcus, accompanied by strong 

 carina, deep and long, extending posteriorly to near 

 margin of carapace; blunt, dorsally concave ridge 

 (disposed dorsal to posterior part of hepatic sulcus 

 and anterior part of branchiocardiac sulcus) 

 delimited dorsally by shallow groove, latter extend- 

 ing anterodorsally almost to cervical sulcus and con- 

 tinuous posteriorly with postcervical sulcus. 



Eye (Fig. 4A ) with optic calathus relatively short, 

 length of mesial margin 0.9-1.1 times distal width; 

 mesial tubercle strong and situated between 0.30 

 and 0.45 length of mesial margin from cornea. 



Antennular peduncle with stylocerite produced in 

 sharply pointed spine falling distinctly short of, to 

 almost reaching, mesial base of distolateral spine; 

 latter slender and sharp. Third article never pro- 

 duced laterally (Fig. IOC); dorsal flagellum reach- 



c 



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Figure 10.— PseudaristeiLS crassipes (Wood-Mason): A, cr 26.5 mm CL, south of Cape Comorin, India, distal articles of right third 

 maxilliped, ventral view. B, Same cr distal articles of right third maxilliped, dorsal view. C, Lectotype 9, Andaman Sea, India, distal 

 articles of right antennular peduncle and flagella, dorsal view (prepared from camera lucida drawings by H. C. Ghosh). D, 9 25 mm 

 CL, south of Andaman Islands, India, distal articles of left third maxilliped, ventral view. Scales: A, B, D = 1 mm, C = A mm. 



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