686 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Cephalothorax, 7 mm.^ long, 0.85 mm. wide. Trunk, 6.40 mm. 

 long, 3 mm. wide, 2 mm. thick. Second maxillae, 1.6 mm. long. 

 Egg strings, 8 mm. long. 



Specific characters of Tnale.—Bodj egg-shaped, more pointed 

 anteriorly than that of uncinata and not as evenly rounded poste- 

 riorly, mth the result that the thickest part of the egg comes, not 

 through the bases of the second maxillae as in unciimta, but a con- 

 siderable distance behind them; no dorsal carapace; mouth tube 

 ahnost in line with the trunk axis and projecting its entire length in 

 front of the anterior margin. First antennae tlii-ee-jointed, with 

 two terminal setae; second antennae with a long basal joint, a short 

 exopod indistinctly jointed and tipped with two tiny spines, and a 

 rudimentary endopod; first maxillae slender, bipartite, with a small 

 palp carrying a single seta; second maxillae long and slender, with 

 a small but powerful terminal claw; maxillipeds with a stout basal 

 joint and a slender terminal claw, both appendages relatively smaller 

 than in uncinata. 



Color (preserved material), a dark yellowish-white. 



(irinus, belonging to an iris flower, alluding to the fleur-de-lis 

 pattern at the posterior end of the trunk.) 



Remarlcs. — This species is quite different from uncinata, and may 

 be recognized by its large size, by the fleur-de-hs pattern at the 

 posterior end of the trunk and. by the shape of the maxilHpeds. It 

 is evidently not a very common species. 



CLAVELLOPSIS, new genus. 



Generic characters of female. — General body form short, thick, and 

 squat; cephalo thorax distinctly separated from the rest of the body 

 but much shorter and thicker than in Clavella; trunk inflated, often 

 wider than long; genital process present and sometimes posterior 

 processes, but no abdomen or anal laminae. 



First antennae four-jointed, situated as in Clavella; second anten- 

 nae biramose, the endopod'( dorsal) one-jointed, the exopod (ventral) 

 distinctly two-jointed and often tipped with a spine or olfactory 

 cylinder; first maxillae bipartite, the palp usually with two setae; 

 second maxillae mth broad and winglike folds of skin at the base of 

 the pedicel of the bulla; maxilUpeds stout, the terminal claw usually 

 reinforced by an accessory claw. 



Generic characters of male. — Cephalothorax and trunk at right 

 angles, the latter a semielhpsoid, strongly arched dorsally and 

 flattened ventrally, with no distinction of parts and no dorsal cara- 

 pace. First antennae three-jointed; second antennae biramose, each 

 ramus unsegmented ; mouth tube extending ventrally at right angles 

 to the long diameter of the ellipse; first maxillae tripartite, without 

 a palp; maxilUpeds at about the center of the ventral surface; second 



