NO. 3652 ISOPODA AND TANAIDACEA—MILLER 25 
RemMARKS.—Menzies (1952) gives the distribution of Janiropsis 
kineardi derjugini as Komandorskie Islands, Bering Sea, to Monterey 
County, Calif. He states that this subspecies is found under rocks in 
the middle and lower intertidal zones, whereas the other subspecies, 
I. k. kineaidi, occurs in small pools where the water is supplied by 
wave splash and is subject to extremes in temperature. The buoy 
collections of J. k. derjugini are within its recorded geographical range. 
It was taken from buoys at depths from the surface to 1.8 meters. 
Of the 17 described species (including subspecies) of Janiropsis, 
seven occur on the Pacific coast. Of these, five are known only from 
the central California coast. 
Family JAEROPSIDAE 
Jaeropsis dubia Menzies and J. d. var. paucispinis Menzies 
FIGuRE 4 
Locauities.—Jaeropsis dubia: California: Catalina Islands (Sta- 
tions 64-66), Pot Dume (Station 70). Jaeropsis d. paucispinis: 
California: Los Angeles Harbor entrance (Station 71). 
Remarks.—Menzies and Barnard (1959) give the distribution of 
Jaeropsis dubia and its variety paucispimis as Marin County, Calif., to 
the Mexican border. The author’s collection contains specimens of this 
species collected by Lloyd Tevis at Bahia del Tortuga, Mexico, north 
latitude 27°40’, which extends its known range considerably south of 
the border; hence, the present records are well within this range. 
Menzies and Barnard (1959) state that it occurs at depths of 10 to 50 
fathoms (18.2-91 meters) but usually at less than 30 fathoms (54.6 
meters), associated with algae. They further state that, at depths 
ereater than 30 fathoms, these forms are located in clear water since, 
in turbid waters, algae rarely are collected below 20 fathoms. In the 
buoy collections, J. dubia was collected at depths ranging from 1.8 to 
13 meters, and J. d. paucispinis at 5.5 meters. The former was taken in 
areas with rocky bottom, the latter from an area with sand-shell 
bottom. 
Neither Menzies (1951) nor Menzies and Barnard (1959) indicates 
any ecological segregation of the two entities, both being collected to- 
gether in the same localities. The variety is separated solely on mor- 
phological grounds, namely, fewer spines on the lateral border of the 
pleotelson and possibly color pattern. Both are related closely to 
Jaeropsis lobata Richardson described from Monterey Bay, Calif. That 
species is perfectly smooth, however, lacking spines on the pleotelson 
and fringed scales on the frontal lamina and antennae, and it has a 
distinctive color pattern. 
