274 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
Stations 4667; 4715; 5120; 5185; 5231. Identified by Sars at the 
first two of these Albatross and at four Monaco stations. Reported 
otherwise only in the Siboga plankton. 
ONCHOCALANUS STEUERI Pesta 
Onchocalanus steueri Pesta, Zool. Jabrb. (Abt. Syst.), vol. 48, p. 516, pl. 8, figs. 
1-11, 1920. 
Station 5185. A single female was found at this Philippine station. 
The species was described from the southern Adriatic and does not 
appear in any of the plankton lists. 
ONCHOCALANUS TRIGONICEPS Sars 
Onchocalanus trigoniceps Sars, Bull. Mus Océanogr. Monaco, No. 26, p. 20, 1905a ; 
Rés. camp. sci. Albert de Monaco, No. 69, p. 144, pl. 40, 1925. 
Stations 4665; 4676; 4679; 4717; 4740; 5320. Identified by Sars 
from 5 of these Albatross and 27 Monaco stations, thus becoming the 
most widely distributed species of the genus. It was also present in 
the Carnegie plankton. 
Genus PACHOS Stebbing, 1910 
PACHOS PUNCTATUM (Claus) 
Pachysoma punctata CLaus, Die freilebenden Copepoden, p. 163, pl. 25, figs. 6-11, 
1863. 
Stations 4615; 4681; 4721; 4724; 4734; 4793; 5185; 5225. <A single 
female was obtained at all of these stations except 4734 where some 25 
specimens were secured; the species was also present at a single 
- Challenger station, at four Siboga stations, and at nine Carnegie 
stations. 
Genus PACHYPTILUS Sars, 1920 
PACHYPTILUS ABBREVIATUS (Sars) 
Pontoptilus abbreviatus Sars, Bull. Mus. Océanogr. Monaco, No. 40, p. 19, 1905b. 
Pachyptilus abbreviatus Sars, Rés. camp. sci. Albert de Monaco, No. 69, p. 319, pl. 
118, 1925. 
Stations 3799 ; 4664 ; 4665 ; 4667 ; 4671; 4676; 4679; 4681; 4685; 4688; 
4700 ; 4711; 4719; 4747; 4760; 5190; Fiji Islands; Ellice Islands. Iden- 
tified by Sars from 11 of these Albatross stations and from three Mon- 
aco stations. It was reported first from the Pacific in the Carnegie 
plankton. The above list of stations shows that the species is more 
widely distributed in that ocean than in the Atlantic, where it was 
originally found. 
PACHYPTILUS EURYGNATHUS Sars 
Pachyptilus eurygnathus Sars, Bull. Inst. Océanogr. Monaco, No. 877, p. 18, 1920; 
tés. camp. sci. Albert de Monaco, No. 69, p. 821, pl. 114, 1925. 
