78 U.S. NATIONAL MUSEUM BULLETIN 2 78 



Gnathopod 1 as in male. Propodus of gnathopod 2 with proximal 

 grasping spine, palm smooth and slightly convex. 



GUIs as in male. 



Pereopods 3-5 as in male except penultimate article of pereopod 5 

 with 1 seta and pereopod 5, 2-seginented instead of 3-segmented. 

 Propodus of pereopods 6 and 7 without grasping spines but with several 

 setae, dactylus wide at base. 



Abdomen with pan* of nonsetose lobes. 



Variation.^ — ^The only additional specimen of this species which 

 was available is a 3.5 mm female with a well-developed brood pouch. 

 This specimen agrees closely with the female allotype except the 

 dactylus of the left side of the maxillipedal palp bears a small sub- 

 terminal seta while the side does not and also pereopod 5 is 3- 

 segmented. 



Distribution.— Type-locality: Hancock Atlantic Exped. sta. 

 A32-39, 3 mi. N. of Coche Island, Venezuela, 10°50' N., 63°54' W., 

 35-60 m, Apr. 15, 1939, 1 male holotype USNM 120176, 1 female 

 allotype USNM 120177, 1 female paratype USNM 120178. 



Remarks. — I have placed this species in the genus Mayerella with 

 some hesitation. It agrees with the generic definition of Mayerella in 

 all characters which are currently in use; however, the abdomen of 

 this species is quite different from M. limicola. The penes are not as 

 long and are separated from one another, the appendages are quite 

 long and recurved at their tips, and the lobes are not distinctly 

 separated. 



The species name is derived from the Latin term "reduncus," 

 meaning curved back, referring to the recurving of the tip of the 

 abdominal appendage. 



Metaprotella Mayer, 1890 



Flagellum of antenna 2 biarticulate, swimming setae absent; 

 mandibular palp 3-segmented, setal formula for terminal article 

 1-x-y-l, molar present; outer lobe of maxilliped larger than inner lobe; 

 gills on pereonites 3 and 4; pereopods 3 and 4, 1-segmented, pereopod 

 5, 6-segmented; abdomen of male with pah" of appendages and pau' of 

 lobes, female with pair of lobes; pereonites 6 and 7 fused. 



Type-species: Protella haswelliana Mayer, 1882 (by monotypy). 



Metaprotella hummelincki, new species 



Figures 39, 40, 50 



Metaprotella spec. Mayer, 1903, p. 43. 



Diagnosis. — Body smooth except for 2 small humps dorsal to inser- 

 tion of gnathopod 2, pereopods 3 and 4 approximately one-fourth 

 length of giUs; male abdominal appendage with papillae at tip. 



