522 



BULLETIN 15 8, UNITED STATES NATIONAL MUSEUM 



Remarks. — This is a very rare species, since the examination of 

 many sting rays yielded but a single specimen. 



BRACHIELLA MITEATA Wilson 



FiGUEE 310 



BracMella mitrata Wilson, Proc. U. S. Nat. Mus., vol. 47, p. 709, pis. 54, 55, 1915. 



Occvjrrence. — Four females were taken from the gills of a tilefish 

 {Lopholatilus chamaeleonticeps) by M. T. Thompson. The fish was 

 captured on the edge of the continental shelf south of Woods Hole. 

 Distribution. — Not found outside the present 

 area. 



Color. — Body of preserved specimens a uni- 

 form brownish yellow. 



Female. — Cephalothorax short and stout and 

 inclined ventrally, so that the axis of the head 

 is at right angles to that of the trunk; margin 

 of carapace slightly raised. Trunk depressed, 

 longer than wide, obliquely truncated posterior- 

 ly; genital process on a level with the ventral 

 surface of the trunk with a small laminate pos- 

 terior process on each side of it. First anten- 

 nae 3-segmented, with two apical setae; exopod 

 of second antenna 2-segmented; second maxil- 

 lae short and separate to their tips, bulla button- 

 shaped on a short stem. Length of cephalothorax, 2.35 mm.; of 

 trunk, 3.65 mm. ; of ovisacs, 5 mm. 

 Male. — Unknown. 



Remarks. — This species may be identified by the short and very 

 thick neck and the minute laminate posterior processes. 



BRACHIELLA ELEGANS Richiardi 



Figure 311 



Brachiella elegans Richiardi, Catalogo degli espositori, Berlin, p. 151, 1880. — 

 Wilson, Proc. U. S. Nat. Mus., vol. 47, p. 707, pis. 54, 55, 1915. 



Occurrence. — Both sexes were taken from the gills of an amber- 

 jack {Seriola lalandi) captured near Woods Hole. 



Distribution. — Mediterranean (Richiardi, Carus, Brian). 



Color. — Body of preserved specimens a uniform dark yellowish 

 brown. 



^ Female. — Cephalothorax short and depressed ; head enlarged, with 

 a large carapace ; neck short, in line with the trunk axis ; trunk elon- 

 gate-triangular, widest across the posterior margin; dorsal posterior 

 processes less than half the length of the ventral and inclined to- 



FlGDRE 3 10. 



ella mitrata 

 male, lateral 



Bracliir 

 Fe- 



