NO. 3574 COPEPOD CRUSTACEANS — LEWIS 23 



not visible. Cephalotliorax with 2 large, heavily sclerotized, dac- 

 tyliform attachment processes on posterior lateral sm-face, processes 

 projecting laterally and slightly posteriorly. Anterior end of cepha- 

 lothorax with 4 adjacent rows of soft, UTegular papillae (figs. 8/, g) 

 running dorsoventraUy, oral opening a distinct depression situated in 

 middle of anterior end of cephalothorax, between inner 2 rows of 

 papillae. Cephalothorax indistinctly separable from neck by indis- 

 tinct, incomplete line of division extending between posterior ends 

 of bases of attachment processes. Neck indistinctly separable into 

 two parts by slight constriction of neck and alimentary tract; pos- 

 terior end of neck separable from anterior end of trunk only by 

 difference in width. Anterior part of neck with distinct constriction 

 in figured specimen (fig. 8a) but constriction believed due to twisting 

 of specimen. Trunk elongate, width varying little throughout 

 length. Oviducal openings situated on indentation in posterior 

 thu'd of trunk (fig. 8d), at beginning of abdominal portion of trunk. 

 Abdominal region tapered distally, bearing numerous ramified proc- 

 esses from lateral, ventral lateral, and ventral surfaces, with exten- 

 sion of alimentary tract running to blind termination at distal ends 

 of processes (fig. 8e). Caudal rami knobhke, on distal lateral surfaces 

 of abdomen, flanking V-shaped indentation at anal opening (fig. 8c), 

 without setae; indication of armature present as 3 small irregularities 

 of heavily sclerotized ramal surface. 



Antennules and antennae situated on median dorsal surface, just 

 posterior to frontal process region. Antennae anterior to antennules, 

 articulating on heavily sclerotized ridge, ridge expanded medially, 

 forming convex projection bearing small, indistinct remains of copep- 

 odite rostrum and small, heavily pigmented ocular region posterior to 

 rostrum (fig. 9a). Antennule (fig. 96) 3-segmented although articulat- 

 ing in doughnut-shaped structure distinct from cephalothoracic 

 cuticle. Fu-st segment with 7 very lightly plumose setae on anterior 

 surface, second segment more elongate than fu'st, with approximately 

 1 1 very lightly plumose setae on anterior and anterior dorsal surface in 

 addition to 1 elongate, aesthete-like structure on distal anterior sur- 

 face. Thu'd segment slightly narrower than second, with one aesthete- 

 like structure from distal posterior surface, 7 naked processes from 

 distal surface (1 of 7 aesthete-like). Antennae (fig. 9c) 3-segmented, 

 first 2 segments broad, distalmost segment with clawlike terminal 

 process. Inner proximal corner of first segment forming knoblike 

 articulation surface, inner lateral margin of segment longer than 

 outer margin; distal surface uTegulariy cup shaped, inner portion 

 receiving inner proximal surface of second segment. Second segment 

 with cup-shaped projection in inner distal surface, projection receiving 

 distal end of terminal process of third segment when segment flexed. 



