242 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



3733-55. Dec. 12. 19.5 mi SW of Santa Barbara Point light, Cali- 

 fornia, 34°-10'-40", 120°-00'-42", in 305 fathoms, green 

 mud. 

 Paraonis multibranchiata (1). 



4759-56. Dec. 6. 0.7 mi from Cardiff by the Sea Tower, California, 

 33°-01'-50", 117°-l7'-45", in 50 feet, very fine green sand. 

 Longosoma catalinensis (20). 



4761-56. Dec. 9. 0.25 mi from Oceanside Pier, California, 33°-ll'- 

 50", 117°-23'-30", in 38 feet, micaceous black silt. 

 Longosoma catalinensis (11). 



A 32-39. 3 miles north of Coche Island, Venezuela, in 21-33 fathoms. 

 Paraonis lyra ( 1 ) . 



Systematic Discussion 



The ORBINIIDAE are recognized for two subfamilies, the OR- 

 BINIINAE, new subfamily and the PROTOARICIINAE, new sub- 

 family. In the former the body is larger and longer; in adults, only the 

 first segment is a smooth ring or it may be superficially divided ; the 

 proboscis is epithelial, voluminous and eversible; parapodia are more or 

 less highly developed and have accessory lobes of diversified kinds ; 

 branchiae are usually well developed and present on many segments. 

 The ORBINIINAE include the genera Orbinia Quatrefages, Phylo 

 Kinberg, Haploscoloplos Monro, Scoloplos (Scoloplos) Blainville, 

 Scoloplos (Leodamas) Kinberg, Scolaricia Eisig, Califia, new genus, and 

 Naineris Blainville. 



In the PROTOARICIINAE the body is much smaller, slenderer 

 and measures less than 15 mm long; the first two segments are smooth; 

 branchiae are less conspicuous or absent; the proboscis is muscular and 

 non-eversible in so far as known. It includes the genera Protoaricia 

 Czerniawsky, Proscoloplos Day and Orbiniella Day. Each of these 

 genera is known for a single species limited to areas in the Atlantic 

 Ocean. 



The following list gives original generic, subgeneric, specific and 

 subspecific names in alphabetical order. Only original names, new 

 combinations and accepted names are given. The 126 original names of 

 species, subspecies or varieties are reduced to 74 valid names; 31 original 

 generic or subgeneric names to 1 1 valid ones. 



Alcandra Kinberg, 1866, p. 251, erected for A. robusta Kinberg. Ques- 

 tionable, see below. 

 Alcandra robusta Kinberg, 1866, p. 251, and Kinberg, 1910, pp. 62-63, 

 pi. 24, fig. 6. Off Brazil in 20 to 30 fathoms. Questionable, see 

 below. 



