254 
PACIFIC SCIENCE, Vol. XXI, April 1967 
TABLE 2 
Chromosome Numbers Previously Reported in the Opisthobranchiate Orders 
Entomotaeniata, 
CEPHALASPIDEA 
, Anaspidea, 
Sacoglqssa, 
AND SOLEOLIFERA 
SPECIES 
CHROMOSOME 
NUMBER 
2n n 
LOCALITY 
REFERENCE 
ENTOMOTAENIATA 
Pyramidellidae 
Tiberia fas data 
17 
Japan 
Inaba, pers. comm. 
ANASPIDEA 
Aplysiidae 
Petalifera punctulata 
34 
17 
Japan 
Inaba, 1959<* 
Notarchus leachti freeri 
17 
Japan 
Inaba, 1959 a 
CEPHALASPIDEA 
Acteonidae 
Cylichnatys angusta 
17 
Japan 
Inaba, pers. comm. 
Philinidae 
Philine japonica 
17 
Japan 
Inaba, 1959^ 
Aglajidae 
Aglaja gigliolii 
34 
17 
Japan 
Inaba, 1959^ 
SACOGLOSSA 
Elysiidae 
Elysia amakusana 
17 
Japan 
Inaba, 1959^ 
Elysia viridis 
17 
Italy 
Mancino and Sordi, 1964& 
Stiligeridae 
Alder ia nigra 
17 
Japan 
Inaba, 1961 
Hermaeopsis variopicta 
17 
Italy 
Mancino and Sordi, 1964& 
Placida dendritica 
34 
17 
Italy 
Mancino and Sordi, 19 64& 
Placida viridis 
34 
17 
Italy 
Mancino and Sordi, 19 64£ 
Stiliger vesiculosus 
34 
17 
Italy 
Mancino and Sordi, 1 964b 
Juliidae 
Berthelinia Umax 
17 
Japan 
Inaba, 1961 
Polybranchiidae 
Bosellia mimetic a 
14 
7 
Italy 
Mancino and Sordi, 1964b 
SOLEOLIFERA 
Veronicellidae 
Veronicella floridana 
16 
U.S.A. 
Burch, 1965 
Laevicaulis alte 
17 
India 
Natarajan, I960 
Onchidiidae 
Oncidiella kurodai 
17 
Japan 
Inaba, 1961 
Onchidium verraculatum 
36 
18 
India 
Natarajan, 1959 
4. Stylocheilus Ion gi cauda (Quoy and Gai- 
mard) (Fig. 4). In tide flats of Eniwetok Is- 
land. March 4, i 960 . 
CEPHALASPIDEA 
5. Haminoea linda Marcus and Burch (Fig. 
5). Parry Island, in sand, in about 2 m of water, 
in lagoon, about 17 m from shore. March 31, 
I960. 
6. Haminoea musetta Marcus and Burch 
(Fig. 6). Middle part of Parry Island on sea- 
ward tide flats. April 2, I960. 
7. Lathophthalmus smaragdinus (Ruppel 
and Leuckart) (Fig. 7). Collected at the south 
end of Parry Island, under loose pieces of coral 
on seaward tide flat. March 15, I960. 
8. Smaragdinella calyculata (Broderip and 
