MONOGRAPH OF THE LEUCOSIADyE. 313 



Genus NuciA, Dana. 



" Carapax parce transversus, antice non productus, latere non dilatatus, inermis, superficie paulo tuber- 

 culatus, fronte bilobatus et non saliens. Oculi paulo remoti, grandiores, marginales. Area buccalis 

 bene triangulata, Maxillipedis extern! articiilus 3tius triangulatus ; palpus angustus, extus rectus. 

 Pedes toti breves, et crassi, digiti in piano 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 Leucosiad^, 

 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. 



Tab. XXX. 



Fig. 1. Leucosia orbicularis, a. side view of the carapace; b. male abdomen; c. female abdomen. 



Fig. 2. Leucosia pallida, a. side view ; b. female abdomen. 



Fig. 3. Leucosia obscura. a. side view ; b. male abdomen ; c, female abdomen. 



Fig. 4. Leucosia marmorea. a. side view; b. male abdomen. 



Fig. 5. Leucosia punctata, a. side view; b. anterior leg; c. male abdomen. 



Fig. 6. Leucosia affinis. a. side view; b. anterior leg; c. male abdomen; d. female abdomen. 



Fig. 7- Leucosia brevbnana. a. side view ; b. female abdomen. 



Fig. 8. Leucosia maryaritacea. a. side view ; b. anterior leg ; c. male abdomen. 



Tab. XXXI. 



Fig. 1. Leucosia ocellata. a. side view; b. anterior leg; c. female abdomen. 



Fig. 2. Leucosia Whitei. a. side view ; b. anterior leg ; c. female abdomen. 



Fig. 3. Leucosia Cumingii. a. side view ; b. anterior leg ; c. female abdomen. 



Fig. 4. Leucosia pulchella. a. side view ; b. anterior leg ; c. male abdomen ; d. female abdomen. 



Fig. 5. Leucosia phyllocheira. a. side view; 6. anterior leg ; c. posterior leg. 



Fig. 6. Persephona Lichtensteinii. a. side view. 



Fig. 7- Persephona orbicularis, a. female abdomen. 



Fig. 8. Persephona Edwardsii. a. female abdomen. 



Tab. XXXII. 



Fig. 1. Leucosilia Jurinii. a. side view; b. anterior leg; c. foot-jaw; d. male abdomen; e. female 



abdomen. 

 Fig. 2. Myra affinis. a. side view ; b. male abdomen ; c. female abdomen. 

 Fig. 3. Myra carinata. a. male abdomen. 

 Fig. 4. Myra elegans. a. side view ; b. female abdomen. 

 Fig. 5. Myra mammillaris . a. male abdomen. 

 Fig. 6. Myrodes eudactylns. a. side view; b. anterior leg; c. foot-jaw; d. male abdomen; e. immature 



female abdomen. 

 Fig. 7. Philyra laivis. a. side view; b. male abdomen. 



