44 PHYLLODOOID^E. 



II. Four antennse. a. The first three dorsal cirri subulate : Phyllodoce (Phyllo- 

 doce, Sav. ; Lugia, Quatref.; Carobia, Quatref.). 

 B. The first two dorsal cirri subulate : 



1. Dorsal cirri on all the segments; 



2. The third segment without a dorsal cirrus. 



c. Only the first dorsal cirrus subulate. The second without 

 a dorsal cirrus (Eteone). 



He alludes to the inextricable confusion in the classification of the Phyllodocidas, and 

 points out that the innervation of the dorsal and ventral cirri and their form give 

 important data. The ventral cirri pass insensibly from the foliaceous to the subulate, but 

 the dorsal change their type abruptly at the second or third segment. In other instances 

 a segment deprived of dorsal cirri is intercalated between the dorsal subulate and the 

 ventral foliaceous. He insists on the fact that the appendages of the buccal segment 

 (so-called tentacular cirri) receive their innervation from the first ventral ganglion. 

 Moreover, he regrets that the name " buccal segment " should be applied to a double ring 

 as in the Eunicidas, or, as in the PhyllodocidaB, to three segments which have distinct 

 appendages and nerve-supply, whereas the first feet of the NTephthydidae and Opheliacea3 

 receive their nerve-supply from the ganglion of the oesophageal connectives. He would 

 therefore arrange the cephalic segments thus : a stomato- gastric with its appendages — the 

 palps ; an anterior antennary carrying the two anterior lateral antennse ; a posterior 

 antennary bearing the median and the two posterior lateral antennse. The median 

 antenna (tentacle) receives a nerve-trunk formed by the union of two nerves, and hence 

 he supposes that the median was originally paired. 



Gravier (1900) describes the Family (in which he includes Lopadorhynchus and the 

 Alciopidas) as having a head (prostomium) provided generally with four or five tentacles 

 (his antennas). First segments of the body, in variable number, with reduced parapodia 

 or modified tactile organs. Foot in the other segments uniramous (exceptionally bi- 

 ramous). Dorsal and ventral cirri foliaceous. As a rule — compound bristles. Tail 

 (pygidium) with two subulate or foliaceous cirri. 



He divides the group into three tribes, the first — or Phyllodocidse proper are 



littoral, the second and third — Lopadorhynchidge and Alciopidse — are pelagic. 



He classifies them after Grube and others according to the number of their tentacles 

 and tentacular cirri, thus : — 



Two tentacular cirri (one on each side) . Eteone. 



Four tentacles 



Three „ 



Four 



,Five 



(One tentacular cirrus 



Five tentacles . \ . . rfoot uniramous 



I r our tentacular cirri j 



I I „ biramous 



Development. — Alex. Agassiz l has described the young stages of a form which he 

 calls Phyllodoce maculata, from the condition in which the larva has only a few indistinct 



Mystides. 



Phyllodoce. 



Kinbergia. 



Porroa ? 



Eulalia. 



Notophyllum. 



Ann. Lyceum Nat. Hist. New York/ viii, p. 333, pis. x and xi, figs. 46—51, 1 



