NO. 2 HARTMAN : NEW SPECIES OF POLYCHAETOUS ANNELIDS 161 



by its much larger associate, and hence easily overlooked. Thus far it has 

 been found to occur only singly in a burrow. No observations have 

 been made on the means of propagation, although examinations have 

 been made during several months of the year. 



The host species, herein identified as Lumbrineris brevicirra 

 (Schmarda), is discussed below. 



Lumbrineris brevicirra (Schmarda) 

 Plate 29, Figs. 5-13 



Notocirrus brevicirrus Schmarda, 1861, p. 117, 4 figs. 

 Lumbrinereis brevicirra Monro, 1933, pp. 83-84 (with synonymy). 

 fLumbriconereis zonata Johnson, 1901, pp. 408-409, pi. 9, figs. 93-100; 



Moore, 1909, p. 254; Treadwell, 1914, p. 196. 

 ? Lumbriconereis grandis Treadwell, 1906, pp. 1170-1171. 

 ? Lumbriconereis sarsi Kinberg, 1865, p. 569. 



The specimens, believed to belong to this species, as redescribed by 

 Monro and others, represent the most commonly encountered species of 

 Lumbrineris in the intertidal zones of California and Lower California, 

 south at least to Ensenada. It is to be found in burrows in sandy 

 beaches, in sand-filled, oblique crevices, and in sand or fine gravel under 

 large beach boulders. It frequently occurs with other species of lumbri- 

 nerids, from which it is easily distinguished in the field. From species 

 of Arabella it differs in being orange red instead of brownish red ; from 

 other species of Lumbrineris it differs in that its posterior parapodial 

 lobes are short, and it is proportionately slenderer and shorter. 



The synonymy of L. brevicirra has been discussed by Monro (1933, 

 p. 83) and others, and additions made to the original brief description. 

 It is still a moot question whether its distribution is cosmopolitan or less 

 extensive. Its identity with the Atlantic form, L. impatiens Claparede, 

 seems likely, but this has not been definitely established. The shape of 

 the prostomial lobe, though not a safe criterion for separation, is seem- 

 ingly different in the two species. In individuals from the Northeast 

 Pacific the lobe is uniformly similar for many individuals examined. It 

 is elongate, conical (pi. 29, figs. 12, 13) in the adult. The maxillary 

 apparatus agrees with that described by Crossland (1924, p. 45). The 

 first parapodium contains a hooded, simple hook in addition to simple 

 limbate setae. There are no composite setae. 



Other names that are believed to have been applied to this species 

 are listed in the synonymy above. L. zonata Johnson is unquestionably 



