110 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



terminates on tlie sixth segment in a minute tooth. The epimeral 

 plates are not much produced. The telson is triangulate, about as 

 long as the sixth segment. The rhipidura has a small peduncle, the 

 inner blade long and narrow, with a tapered convex distal margin 

 and a strong median longitudinal rib. The outer blade is wider, with 

 the outer lateral margin thickened, the distal margin broadly 

 rounded; both blades are fringed with a web-like brush of cilia on 

 the distal and inner lateral margins. 



The eye is large, reniform, with a flattish calcareous scale dorsally 

 and very convex on the outer side. 



The antennulae have the basal article long, concave beneath the 

 eye, with an incised lateral process; the second article is narrowed 

 elongate, with a lateral carina along the lower outer margin. The 

 third article is small, bulbous; the flagellum is biarticulate, about 

 as long as the entire peduncle ; the branches of approximately equal 

 length, the lower branch being the thicker and quite setose; the 

 annulations of both whips are short. 



The antennae have a short peduncle, the second article very small, 

 the third article elongate cylindrical, scarcely one-third the length 

 of the scaphocerite ; the flagellum is multiarticulate. 



The first, second and third legs are chelate, increasing in length 

 in the order named. The basis and ischium of the first legs are each 

 armed with a spine; two spines occur on the sternum between the 

 bases of the second legs. The fourth and fifth legs are long, slender, 

 monodactyl. 



The petasma is asymmetrical, the left side the longer, with its distal 

 portion ovate and quite narrowed at the anterior end. The thelycum 

 has the lateral plates broad and fused, the central plate about 

 semicircular. 



Synonymy. — Parapeneus Jcishinouyei Rathbun, Proe. Wash. Acad. 

 Sci., vol. IV, p. 288, pi. 12, figs. 13-15, 1902.— Proc. U. S. Nat. 

 Mus., vol. 38, p. 607. — Schmitt, Zoologica, N. Y. Zool. Soc, vol. 

 V, p. 161, 1925. 



Penaeopsis goodei (S. I. Smith). 

 Plate 34, text fig. 4 A, B. 



Type: Collected at Bermuda, by Dr. G. Brown Goode, second 

 secretary of the Smithsonian Institute, and deposited in the United 

 States National Museum. 



