CRUSTACEA MALACOBTRACA. III. IO9 



a. Abdomen with produced and acute postero-lateral angles. Fifth joint of first pair of leg* with 

 four spines along the lower margin, and a minute spine close above the very long itpiuc from 

 the distal angle 9. /). armatum G. O. S. 



b. Abdomen posteriorly rounded, without produced postero-lateral angle*. Fifth joint of first pair 

 of legs with three spines or a single spine on the lower margin, and no spine above the very 

 long spine projecting from the distal angle. 



a. Fifth joint of first pair of legs with three spines on the lower margin, the terminal spiiu- 



included (D. angustum (Hansen, MS.) G. O. Sars) 



j. Fifth joint of first pair of legs with a single spine, the terminal, on the lower margin. 



& Lower margin of fifth joint of first pair of legs more than twice as long as the depth of 

 the joint and slightly shorter than sixth joint, which is about four times as long as deep. 

 Fifth thoracic segment in the female much broader at the anterior than at the posterior 

 margin and more than twice as broad as the length of the median line, with the lateral 

 margins convex, and the surface strongly reticulate. Very large species. (// chflattim 



Stcphenseii). 



8. Lower margin of fifth joint of first pair of legs a little less than twice as long as the 

 depth of the joint, and slightly shorter than sixth joint, which is almost three times as 

 long as deep. Fifth thoracic segment in the female much broader at the anterior than 

 at the posterior margin, a little more than twice as broad as the length of its median 

 line, with the lateral margins a little concave near the middle, and the surface strongly 



reticulate. Moderately large species. ia D. insignc n. sp. 



888- Lower margin of fifth joint of first pair of legs scarcely half as long again as the depth 

 of Uie joint, and considerably shorter than sixth joint, which is conspicuously less than 

 three times as long as deep. Fifth thoracic segment in the female narrower at the anterior 

 than at the posterior margin, not one-third as broad again as the length of its median 

 line, with the lateral margins scarcely concave at the middle, and the upper surface 

 scarcely reticulate. Small species 1 1. D. f>Ubrjum n. sp. 



67. Desmosoma globiceps Mi-inert. 

 (PI. X, figs. 4 a 4!)). 



1890. Eugcrda globitrps Meinert, "HauclTs Togter, p. 194; PI. II, figs. 5361 

 ! 1899. G- O. Sars, Account, II, p. 252; Suppl. PI. Ill, fig. i. 



The figures and description published by Sars may be sufficient for the recognition of this 

 species, but a few points may be mentioned here. 



First thoracic segment (fig. 4 a) is very short, only about half as long as the second, with the 



cpimera somewhat produced and terminating in a spine The anterior part of the epimera of second 



segment is distinctly produced, triangular, with the end acute or obtuse, terminating in a short seta. 



As figured by Sars, the legs of first pair are slender, and fifth joint without seta: on the lower 



margin. Second pair of legs with fifth joint (fig. 4 b) very characteristic, compressed, somewhat 



