406 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



pairs. These hooks are deep yellow, somewhat flattened and slightly 

 falcate distally; they show very few indications of cross striations and 

 notably less than those in C. capitata (Fabricius). Those in the eighth 

 segment are slenderer than those in the ninth one. 



Anterior abdominal segments are biannulate and longer than wide ; at 

 the eighth one they are nearly 3 times as long as wide and they continue 

 proportionately long to the posterior end of the body. Interparapodial 

 nodes are transversely wrinkled as though capable of great extension in 

 life. Abdominal parapodia are located near the posterior margin of the 

 segment. Notopodia and neuropodia are well separated from each other; 

 the neuropodial ridge is typically the longer. These ridges are thick, 

 glandular and opaque white; the posterior portion is thicker and more 

 elevated than the anterior one. In segments far back the posterior flange 

 forms a neat, thick crescent behind and around the uncinal ridge. 



Genital pores resemble those in C. capitata (Fabricius) ; in the fe- 

 male they form a pair of elongate, oval, opaque white areas at the sides of 

 the body and they are located on the seventh and eighth segments. 



Abdominal hooks are long shafted and terminate in a beak that is 

 covered over with a delicate hood. The major fang is long and nearly at 

 right angles to the shaft; it is surmounted by 4 (or rarely 5) fine teeth 

 in a transverse row. The hyaline hood extends only slightly beyond the 

 distal teeth. The shaft has a conspicuous asymmetrical node. The fibril- 

 lations extend basally to the end but distally only to the neck. Shoulder 

 and neck regions are clearly marked. 



The posterior end tapers to a narrow ring and ends in a small collar- 

 like pygidium with a mid-dorsal notch; there are seemingly no terminal 

 appendages. 



C. ovincola is known to occur only in the gelatinous lobed egg masses 

 of squid; it forms compact clumps in the egg jelly; in June various stages 

 of development to maturity are present. Individuals are irregularly 

 intertwined with one another but each is sheathed in a thin, flexible, 

 chitinous layer; there is no distinct tube or burrow. 



C. ovincola differs from C. capitata grossly in being noticeably larger 

 and having greatly prolonged abdominal segments. Abdominal para- 

 podia are thicker and larger than those in C. capitata. Hooded hooks 

 may accompany setae in the sixth and seventh setigerous segments or be 

 present already in the fifth one. Genital hooks number 4 or 5 pairs in 

 the eighth segment and 3 or 4 pairs in the ninth one. Abdominal hooks 

 have 4 or 5 teeth above the fang instead of only 3. The 2 species differ 



