DROMHDiE 15 



tubercle there present shows, according to Henderson,* "a slight trace of 

 bifurcation in front." 



Dromidia segnipes sp. nov. 

 Plate I, figs. 1-2. 



Carapace pubescent, markedly convex, and about as long as wide. 

 Stimpson describes Dromidia antillensis, the most closely related form, as 

 "somewhat longer than broad" and gives the following measurements: 

 "length of carapax, 1.30; breadth, 1.28 inch." The specimen at hand is 

 considerably smaller and is broader than long, measuring 15 by 15.7 mm., 

 but these relative proportions may be found to vary with age, as Hender- 

 son * gives the measurements of an immature D. antillensis 13.5 long by 

 13.8 mm. wide. Front tridentate, the inner angles of the orbits more 

 prominent than the rostral point, so that the front seems divided by a deep 

 rounded notch when seen from above. In D. antillensis these teeth are 

 stated to be subequal. Supraorbital teeth considerably smaller and more 

 acute than those of front. External angle of orbit prominent and bounded 

 by a marked fissure, as in D. antillensis. 



The antero-lateral margin of the carapace is four-toothed as in 

 D. antillensis but the teeth are obscured to superficial examination by the 

 pubescence. The most posterior, located just behind the cervical groove, 

 is acute and directed forward ; the next anterior to this is the most promi- 

 nent and forms the greatest width of the carapace, it is also acute ; the 

 next is smaller but still acute; these alone are visible from above. The 

 most anterior is very low and rounded, resembling more the tubercle at 

 the angle of the buccal cavern than the preceding teeth. In D. antillensis 

 the three anterior teeth are said by Stimpson to be "subspiniform," and 

 by Benedict f to be "little more than enlarged granules." The tooth pos- 

 terior to the cervical groove is also stated to be less acute than the others, 

 which is not the case in the specimen at hand. 



The pubescence of the carapace is somewhat longer and more dense 

 in the frontal region and sparser in the branchial regions. On removing 

 the pubescence the carapace is seen to be glabrous and definitely, though 

 not deeply areolated. The cervical groove, the most prominent of the 

 markings, runs from a point just anterior to the last antero-lateral tooth 

 nearly to the middle of the posterior margin of the carapace, where it be- 



* Henderson, Challenger Anomura, Part Ixix, 12. 



t Benedict, U. S. Fish Commission Bull, for 1900, ii, 132. 



