556 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



margins of the fifth segment; it is rounded posteriorly, and with or 

 without a minute excavation. 



FIG. 603. PROBOPYRUS 

 FI.OKIDEN8IS. FIRST 

 LAMELLA OF MARSU- 



PIUM. X 10. 



FIG. 602. PROBOPYRUS FLORIDENSIS. a, DORSAL VIEW OF FEMALE. 6, VENTRAL VIEW OF SAME, x 12. 



The pleopoda consist of five pairs of double-branched lamellar 

 appendages. 



The incubatory lamellae are large, encircling the incubatory pouch, 

 leaving only a small opening into the interior. The first pair of plates 

 have the terminal lobe of the distal segment straight. 

 All the legs have a well rounded expansion or 

 carina about the middle of the basis. 



Male with all the segments of the thorax well 

 defined and widely separated at the sides. Body 

 narrow, elongate, nearly three times as long as wide. 



The abdomen has all the segments 

 well defined at the sides, but fused 

 in the middle of the dorsal surface. 

 Length almost equal to the breadth. Terminal seg- 

 ment well defined, rounded posteriorly, and extending 

 beyond the lobes of the preceding 

 segment. The lateral margins of all 

 the segments are rounded. Pleopoda 

 are present in the form of pairs of 

 small rounded processes, a pair on 

 each segment of the abdomen. Eyes 

 present. 



One specimen was collected by Mr. 

 W. C. Kendall at Satsuma Island, 

 above St. Johns River, Florida; parasitic on Palse- 

 monetes exilipes Stimpson. Two other specimens 

 were obtained by the U. S. Bureau of Fisheries steamer Albatrosa at 

 Little River, Miama, Florida; parasitic also on Palsemonetes emlipes 

 Stimpson. 



Type Cat. No. 29090, U.S.N.M. 



FIG. 604. PROBOPY- 

 RUS KLORIDENSIS. 

 LEG OF SIXTH PAIR 

 OF ADULT FEMALE. 

 X 39. 



FIG. 605. PROBOPY- 

 RUS FLORIDENSIS. 



MALE, x 41. 



