— 
. 
4 r 
an] - 
CRUSTACEA OF THE MERGUI ARCHIPELAGO. 205 
each presenting two or three small teeth near their tips, whereas 
the mobile finger has some similarly small teeth along its inner 
edge. 
The ambulatory legs are completely glabrous. 
Dimensions of the Mergui specimens :— 
millim. 
Length of the cephalothorax (the epistome included) 15 
Breadth of the cephalothorax ...............+.- 142 
Length of the chelipedes ..........---..+.-4-5: 27 
Wenephiol the palm... 2.25 - fey. Se es 5? 
me athilinOlabhier Pali «eo 1 oo oie t hc clots intact ht eoavel me 3¢ 
The following are the dimensions of Fabricius’s large male 
specimen preserved in the Museum of the University of Kiel* :— 
millim. 
Length of the cephalothorax (the epistome included) 29} 
Breadth of the cephalothorax, .......6.:........ 293 
ieneth ot the chelipedes  ... 1... ..02 62 een ewe 61 
MRemOG Or Ghe Ali. .ts.ie elo s ote ee 125 
Bmeaduneore then palm a2... 1 Wilh aGs cies et coe et nn 10 
Genus Myra, Leach. 
114. Myra punctata, Herbst. 
Cancer punctatus, Herbst, Krabben und Krebse, p. 89, pl. ii. figs. 15, 16. 
Myra carinata, Bell, 1. c. p. 297, pl. xxxu. fig. 3. 
Myra punctata, Hilgendorf, Monatsber. d. K. preuss. Akad. d. Wiss. 
Berlin, Nov. 1878, p. 811. 
Four male specimens of various sizes were collected. 
The genus Myra without doubt stands much in need of re- 
vision, and it is extremely probable that many of the species 
* Prof. Mobius also forwarded to me the type specimen of Fabricius’s Leucosia 
porcellana, which has hitherto been regarded by authors as belonging to the 
genus Philyra, and was believed by Bell to be scarcely distinct from Philyra 
globosa. Iam now able to state that Lewcosia porcellana is a true Leucosia, 
somewhat allied to L. rhomboidalis, de Haan. In Leucosia porcellana there 
is a large thoracic sinus; the upper surface is smooth and the cephalothorax 
appears rhomboidal, being, however, less prominent anteriorly than in L. rhom- 
boidalis, de Haan. The front is little prominent and triangular. The upper 
surfaces of the arms only present a few granules at their bases, covered by a 
tuft of hairs, and the inner margins of the hands are granular. The specimen 
sent to me was a female; the cephalothorax is 194 millim. long and 173 millim. 
broad. 
