MARINE CRUSTACEANS. 203 
II. Crest on basal joint of second antenna with three large spines. 
1. Front two-lobed. 
Var. E, intermedia n. 
2. Front four-lobed. 
Var. F, quadrilobata Miers, 1884. 
Admeta was taken on the shore in Minikoi, Goidu, Fadifolu, and S. Mahlos; intermedia 
on the shore in Goidu and Fadifolu, in 5 fathoms at North Male and in 30 fathoms at 
Haddumati; granosimana in 20—43 fathoms on bottoms of varying description in Mahlos, 
Kolumadulu, South Nilandu and Suvadiva; and savignyi in 23—28 fathoms at North Male 
and Mahlos. The latter variety was probably also seen at Minikoi. 
Admeta, savignyi and intermedia are, to the best of my knowledge, found both on the 
reef and in the lagoon’. With them go probably edwardsi and quadrilobata. Savignyi and 
intermedia certainly, and probably also the other three, extend from the shore down to 30 
or 40 fathoms at least. Granosimana, which shows features which tend to ally it with 
T. sima, has, like the latter species, been found only in deep water in the Maldives. If 
this be a real and not an apparent limitation (see above p. 201), the same cause is probably 
at work in both cases, and granosimana very likely exists elsewhere on the shore with J. sima 
and . poissont. In that case it is probably an incipient species in a somewhat earlier stage 
than T. sima and T. poissont. On the other hand it may be a genuine local subspecies. 
10. Thalamita exetastica Alc. 1900. Alcock, rv. p. 86. 
The collection contains a number of specimens which are at least closely allied to this 
species and may all be for the present classed as varieties of it. Some of them approach 
very closely to Alcock’s definition, but there is one point in which all fall somewhat. short. 
This is in the squamiform markings on the chelipeds, which never completely cover the 
limb but are always replaced to a greater or less extent by more rounded granulations on 
the upper side, and are often wanting over a part of the lower side. 
Three varieties are present: 
1. Var. A. Typical, that is, agrees with Alcock’s definition in all points (except the 
granulation of the chelipeds as above). 
2. Var. B, spinifera. Differs from the type in having a varying number of spines on 
the hinder edge of the propodite of the last leg. In this point it approaches 7. investiga- 
toris, Alcock, 1900. 
3. Var. C, macrodonta. Has no spines on hinder edge of last propodite, but differs 
from type in that: 
(i) The last side-tooth is nearly as large as the third and projects somewhat more 
than the rest. Fourth tooth rudimentary. 
(ii) The median frontal lobes are distinctly narrower than the submedian. About 
1:2 in the Kolumadulu specimen, and 2:3 in the Suvadiva specimen. 
In both these respects the variety approaches 7. investigatoris. 
1 See footnote to p. 191. 
