<;-j l 



PROCEEDINGS OF Till: \\T/<>\ \l, Ml si:: l/. 



vol. 38. 



Second gnathopods of female slender and weak; carpus and propodus 



elongated and much narrower than in male; carpus more than twice 

 as long as broad, posterior projection proportionally not so great as 

 in male; propodus more than twice as long as broad; palm forming 

 less than a right angle with posterior margin, furnished with fewer 

 submarginal spines than in male; dactyl not strongly curved ami 

 lilting palm closely. 



Posterior margins of coxal platesof third, fourth, and fifth peraeopods 

 serrate. 



Fig. i.— IIyai.ei.ia Knickerbockers mai.kx 12. Madison, Wisconsin. After Smith. 



Postero-lateral angles of first two abdominal segments slightly 

 produced, forming less than a right angle; first two or three segments 

 usually produced dorsally, forming a well-marked median posterior 

 tooth. Telson short, entire, as broad as long, furnished distally with 

 a slender seta at each side. 



fust uropods almost twice as long as second pair; third pair very 

 short, not exceeding basal segment of second pair in length; peduncle 

 short, nearly as broad as long, furnished distally with a few hairs; 

 the single ramus slender, tapering, about equal in length to peduncle 

 and provided with a few slender seta: at tip. 



