CIRRATULUS DANIELSENI. 379 



obviously stouter single seta or spine which probably represents a crochet. It 

 is strongly longitudinally fibrillated, acutely pointed distad and, so far as made 

 out, wholly lacked any marginal serration. (Plate 70, fig. 8). The distribution 

 forward of this spine could not be followed with certainty. 



Branchiae in general occur, a pair on each somite, back at least as far 

 as the eightieth somite. Each of the paired branchiae is inserted above the 

 notopodium toward the caudal border of the somite, the distance above the 

 notopodium not being large. The branchiae are filiform, distally pointed, and 

 long, though most are broken off and could not be measured. In the smaller 

 specimen, a possibly complete branchia on about the twentieth somite is but 

 6 mm. long, while one near the eightieth somite measured 20 mm. The spe- 

 cial branchiae are on the first somite. On the left side in both specimens 

 there is a single branchia just above the notopodium; above this is a slightly 

 raised mound from which one long and one short branchia arise, in the smaller 

 specimen the one appearing as a branch from the base of the other. In this 

 specimen, too, the single, or ventral, branchia is very small, probably in process 

 of regeneration. On the right side in both specimens are three branchiae aris- 

 ing close together in a single group from a common elevation, of which one is 

 long and two short. There is a very wide, naked, dorsal area between the 

 two groups of branchiae. 



Locality. Gulf of Cahfornia: Sta. 3435 (lat. 26° 48' N., long. 110° 45' 

 20" W.). Depth 859 fms. Bottom of brown mud with black specks. Bottom 

 temp. 37.3° F. 22 April, 1891. Two specimens. 



This species would seem to be well characterized through the almost com- 

 plete obliteration of crochets as such, the high number of partial divisions in 

 the peristomium, and the fewness of the special branchiae, with their situation 

 on the first setigerous somite. It is much smaller than the preceding species 

 and larger than C. robustus Johnson occurring farther north in the littoral 

 region. 



CiRRATULUS DANIELSENI HailSeil. 

 Mem. cour. savants ctrang., 1881, 44, p. 17, pi. 5, fig. 11-15. 



This species, described originally from the Bay of Rio de Janeiro, conforms 

 to Timarete as defined by Kinberg. 



Locality. — Brazil: Abrolhos, off the Coast. 28 December, 1887. One 

 well-preserved specimen. 



