MONOGRAPH OF THE LEUCOSIADA. 313 
Genus Nucıa, Dana. 
“ Carapax parcè transversus, anticè non productus, latere non dilatatus, inermis superficie pauld tuber- 
culatus, fronte bilobatus et non saliens. Oculi pauld remoti, grandiores, cdi giai hers buccalis 
bené triangulata. Maxillipedis externi articulus 3tius triangulatus; palpus angustus, extüs rectus. 
Pedes toti breves, et crassi, digiti in plano subverticali claudente, eodem cum manus articulatione." 
NUCIA SPECIOSA, Dana, /. c. p. 397. t. 25. f. 5. 
It is unnecessary to quote the description of the only species upon which this genus is 
. founded. It appears to me that it is scarcely admissible into the family of LEUCOSIADÆ, 
on account of the extraordinary size of the eyes, the thickness of the legs, and other 
characters, no less than the general form and aspect of the body. I give this opinion 
with deference in the absence of an actual specimen. 
EXPLANATION OF THE PLATES. 
Tas. XXX. 
. Leucosia orbicularis. a. side view of the carapace; b. male abdomen; c. female abdomen. 
. Leucosia pallida. a. side view; b. female abdomen. 
Leucosia obscura. a. side view; b. male abdomen; c. female abdomen. 
. Leucosia marmorea. a. side view; b. male abdomen. 
. Leucosia punctata. a. side view; b. anterior leg; c. male abdomen. 
. Leucosia affinis. a. side view; b. anterior leg; c. male abdomen; d. female abdomen. 
. Leucosia brevimana. a. side view; b. female abdomen. 
a. side view; b. anterior leg; c. male abdomen. 
Tas. XXXI. 
a. side view; b. anterior leg; c. female abdomen. 
b. anterior leg; c. female abdomen. 
c. female abdomen. — 
c. male abdomen ; d. female abdomen. 
= 
WC LU 0? O9 O9 OS a 
D 10 Où À © to — 
. Leucosia margaritacea. 
. Leucosia ocellata. 
. Leucosia Whitei. a. side view; 
. Leucosia Cumingü. a. side view; b. anterior leg ; 
. Leucosia pulchella. a. side view; b. anterior leg ; 
Leucosia phyllocheira. a. side view ; b. anterior leg; €. posterior leg. 
. Persephona Lichtensteinii. a. side view. 
. Persephona orbicularis. a. female abdomen. 
Fig. 8. Persephona Edwardsii. a. female abdomen. 
Tas. XXXII. 
a. side view; 4 anterior leg; c. foot-jaw; 
= 
i3 dy dq OR d 
To) wm o Dr - 
Fig. 1. Leucosilia Jurinii d. male abdomen; e. female 
(d. ii. 
abdomen. 
Fig. 2. Myra affinis. a. side view; 
Fig. 3. Myra carinata. a. male abdomen. ; 
Fig. 4. Myra elegans. a. side view; b. female abdomen. 
Fig. 5. Myra mammillaris. a. male abdomen. oe T a 
Fig. 6. Myrodes eudactylus. a. side view; b. anterior leg; c. foot-jaw; d. male abdomen; e. immature 
female abdomen. 
Fig. 7. Philyra levis. a. side view; 
b. male abdomen ; €. female abdomen. 
b. male abdomen. 
