CEUSTACEA. 193 



Other specimens of this species are in the British Museum from 

 Moreton Bay (purchased), and from the oolleotion of H.M.8. 

 ' Samarang,' -without precise indication of locality. 



The spines of the carapace vary considerably in number and 

 length ; in an adult female from Moreton Bay the two posterior 

 spines of the carapace are absent ; in a small male from the same 

 locality both are present, although very small ; in Dr. Coppinger's 

 specimens one only is developed. In none of the specimens I have 

 examined are the spines 6f the carapace knobbed at the tip. 

 These specimens principally differ from Haswell's description in 

 having but a single broad and usually dentated lobe behind the 

 three straight, acute, spinous teeth of the upper orbital border, as in 

 De Haan's figure of P. hngispinus. They are only distinguished 

 from P. longispinus by the form of the hands of the chelipedes, the 

 palms (alike in males and females) being slenderer, with the upper 

 margins straight, and the fingers straight and meeting along their 

 inner edges, which are entire, without spines or tubercles on their 

 inner margins. It is not stated if this character exists in the types 

 of P. cojapingeri; and I am therefore somewhat doubtful if our speci- 

 mens belong to that species, which may after all be synonymous 

 with P. longispinus. In the latter event the Museum examples 

 referred to P. coppingeri would apparently require a distinct 

 specific appellation. 



10. Paramithrax (Chlorinoides) aculeatus, var. armatus. 

 (PlATB XVIII. fig. A.) 



I thus designate a series of specimens in the collection which 

 apparentl}' approach so nearly the Ghorinus aculeatus of Milne- 

 Edwards as to render it unadvisable to separate them specifically 

 in the absence of figures of 0. aculeatus. As Milne-Edwards's 

 description* is somewhat brief, I subjoin the following description 

 of an adult example in Dr. Coppinger's collection : — 



Carapace more or less pubescent, subpyriforms, moderately convex, 

 withfive spines arranged in a median longitudinal series, of which two 

 are situate on the gastric, one on the cardiac, and one on the intestinal 

 region, and one on the posterior margin ; there are also two strong and 

 outwardly-divergent spines on each of the branchial regions. The 

 rostral spines are long, acute, curving- outward, and separated from 

 one another, even at their bases, by a distinct interspace ; the upper 

 orbital margia has two deep fissures ; the praeooular spine is strong 

 and curves upward ; there is also a strong postocular spine, wliich 

 has a tooth on its posterior margin ; posterior to this, on the sides 

 of the carapace, is another small spine. On the inferior surface of 

 the carapace (on the pterygostomian region) are three tubercles 

 arranged in an oblique line ; and posterior and parallel to these an 

 oblique crest, which terminates in a tooth or short spine. There is 

 a strong tooth directed downward on the interantennal septum, and 



* Vide Hist. Nat. Crust, i. p. 316 (1834). 



