NO. 4 HARTMAN : POLYCHAETOUS ANNELIDS 429 



from the east coast of Vancouver Island, British Columbia in 15-20 fms 

 and from Rosario Inlet, Washington in 5-6 fms. 



The present collections were made by the U.S.S. Albatross, station 

 3133, Monterey Bay, California in 37 fms, March 14, 1890 from a bot- 

 tom of brown mud and from station D5744, San Francisco Bay, Cali- 

 fornia in SYa fms, March 18, 1912. 



Genus LEIOGHRIDES Augener 

 Type L. australis Augener 



The thorax consists of 13 segments; the first or peristomium is achae- 

 tous, the second to twelfth segments are provided with notopodia and 

 neuropodia in which all setae are slender and pointed. The abdomen is 

 provided with only long-handled, hooded hooks. The prostomium has 

 eyespots. The surface epithelium is not areolated. Branchiae have not 

 been described and may be absent. The pygidium is terminal and lacks 

 modified papillae or other special structures. 



Leiochrides was erected for a single species, L. australis Augener 

 (1914, p. 60) from Australia. A second species, L. africanus Augener 

 (1918, pp. 472-474) from west Africa, was later referred to it. A third 

 species, Notomastus pallidior Chamberlin (see below) is believed to be 

 congeneric. 



Leiochrides pallidior (Chamberlin), new combination 



Notomastus pallidior Chamberlin, 1918, p. 179; Berkeley, 1942, p. 198. 



There are no representatives available for study. The species is 

 known through an original, unillustrated account that is incomplete in 

 some important details. Since it was originally referred to the genus 

 Notomastus, it is presumed that all thoracic segments have pointed setae 

 only and that the abdominal parapodia have hooks only. None of the 

 specimens described were complete posteriorly; the pygidial structures 

 therefore remain unknown. Color in life is yellow. 



The thorax consists of 12 setigerous segments; it is thus not a Noto- 

 mastus. Only 3 genera of Capitellidae are known in which the thorax 

 consists of an achaetous peristomium and 12 setigerous segments. They 

 are Heteromastides, Leiochrides and Scyphoproctus. The first of these 

 differs in that it has thoracic hooks as well as setae. The last has an anal 

 funnel and acicular spines. The second, Leiochrides, is thus the only 

 remaining genus to which Notomastus pallidior can be referred, in so far 

 as the species is known. 



