280 



Fishery Bulletin 88(2). 1990 



Figure 1 



Composite drawing of female (left) 

 and male (riglit) Citrcinonemertes 

 wickhami from Panulir-us interrup- 

 tus. Note the reproductive system of 

 the male is represented on the right 

 side of the body, while the digestive 

 system is figured on the left side, and 

 the circulatory system has been 

 omitted for clarity. Key to labels: APC 

 = anterior proboscis chamber; ES = 

 foregiit; DG = dorsal ganglia; ID = 

 intestinal diverticula; LH = lateral 

 horn of intestine; LN = lateral nerve 

 cord; LV = lateral blood vessel; MPC 

 = middle proboscis chamber; OC = 

 ocellus; = ovary; PPC = posterior 

 proboscis chamber; PS = proboscis 

 sheath; R = rhynchodaeum; S = 

 shoulder; T = testis; TD = Taka- 

 kura's duct system (vasa eferens, vas 

 deferens, seminal vesicle, gonoduct); 

 VG = ventral ganglion. Bar = 200 



micrometers unless otherwise stated. Means are given 

 witli ranges in parentheses. 



Worms were fixed in hot AFA (acetic acid, formalde- 

 hyde, alcohol) or 5% formalin-seawater. Representative 

 specimens were sectioned at 10 /jm and stained with 

 hematoxylin and eosin. 



Description 



Carcinonemertes wickhami 

 new species (Figs. 1-13) 



Female (3 living specimens; 7 specimens, sectioned) 

 Body slender, ciliated; orange color. Shape filiform with 

 rounded anterior end, blunt posterior end; found in 

 tough, glistening parchment-like sheaths, but often 

 free. Sheaths with minute refractile lapilli, grainy in 

 texture, slightly longer than accompanying worm. 

 Worm length 10-30 mm, up to 50 mm when fully ex- 

 tended, average width 400 (345-456). Two ocelli an- 

 terior to prominent dorsal and ventral cerebral gang- 

 lia. Ocelli cup-shaped, conspicuous, 36 (34-39) long by 

 28 wide; located 145 (126-168) from anterior end. 

 Distance between ocelli 257 (172-368). Rhynchodaeum 

 and esophagus passing between commissures of the 

 dorsal and ventral ganglia. Anterior portions of lateral 

 blood vessels fuse between dorsal and ventral cephalic 



commissures in a single anterior loop. Posterior por- 

 tion of lateral blood vessel ventral to lateral nerve cord 

 near anus. Proboscis with three chambers, dorsomedial 

 or lateral to posterior part of foregut. Anterior probos- 

 cis chamber 98 (84-112) long by 80 (70-87) in diam- 

 eter, with basis and stylet. Basis large, 40 (36-42) long 

 by 14 in posterior diameter. Single large stylet, 20 

 (19-20) long, with posterior knob-like proximal piece. 

 Middle proboscis chamber granular in appearance, 47 

 (39-59) in diameter. Posterior proboscis chamber long, 

 slender, 125 (112-140) long by 42 (28-56) in diameter; 

 glandular, with lumen. Foregut joins rhynchodaeum at 

 or just posterior to cephalic commissure. Posterior part 

 of foregut robust, 380 (280-517) long, by 244 (182-345) 

 in diameter; muscular, ciliated. Musculature of foregut 

 attached laterally to longitudinal musculature of body 

 wall. Posterior part of foregut leading directly into in- 

 testine; pyloric stomach absent. Intestine with a pair 

 of lateral diverticula extending anterior to level of mid- 

 dle proboscis chamber. Intestine posterior to foregut 

 with numerous paired, unbranched diverticula. Anus 

 terminal. Ovaries elongate, with medial and lateral 

 lobes; numerous, regularly distributed between intes- 

 tinal diverticula. Ovaries with indistinct ovarian pores. 

 Ovarian field begins immediately posterior to posterior 

 part of foregut, extends to near anus. In section, ova- 

 ries with appearance of four rows in immature and 

 mature females (compare Figure 4 with Figure 1); but 

 ovaries really in two distinct rows (Fig. 1). Ovaries 



