Report on the zoological collections made in the Indo-Pacific Ocean ...

—CRtrSTACEA. 193'Other specimens of this species are in the British Museum fromMoreton Bay (purchased), and from the collection of H.M.S.'Saraarang,' without precise indication of locality.The spines of the carapace vary considerably in number andlength ; in an adult female from Moreton Bay the two posteriorspines of the carapace are absent ; in a small male from the samelocality both are present, although very small ; in Dr. Coppinger'sspecimens one only is developed. In none of the specimens I haveexamined are the spines of the carapace knobbed at the tip.These specimens principally differ from Haswell's description inhaving but a single broad and usually dentated lobe behind thethree straight, acute, spinous teeth of the upper orbital border, as inHe Haan's figure of P. longispinus. They are only distinguishedfrom P. lonrjispinus by the form of the hands of the chelipedes, thepalms (alike in males and females) being slenderer, with the uppermargins straight, and the fingers straight and meeting along theirinner edges, which are entire, without spines or tubercles on theirinner margins. It is not stated if this character exists in the typesof P. copjrinr/eri; and I am therefore somewhat doubtful if our specimensbelong to that species, which may after all be synonymouswith P. lom/ispinus. In the latter event the Museum examplesreferred to P. eopjnngeri would apparently require a distinctspecific appellation.10. Paramithrax (Chlorinoides) aculeatus, var. armatus.(Plate XVIII. fig. A.)I thus designate a series of specimens in the collection whichapparentl}^ approach so nearly the Chorinus aculeatus of Milne-Edwards as to render it unadvisable to separate them specificallyin the absence of figures of G. aculeatus. As Milne-Edwards'sdescription* is somewhat brief, I subjoin the following descriptionof an adult example in Dr. Coppinger's collection :CarajDace more or less pubescent, subpyriform, moderately convex,with five spines arranged in a median longitudinal series, of which twoare situate on the gastric, one on the cardiac, and one on the intestinalregion, and one on the posterior margin ; there are also two strong andoutwardly-divergent spines on each of the branchial regions. Therostral spines are long, acute, curving outward, and separate! fromone another, even at their bases, by a distinct interspace ; the upperorbital margia has two deep fissures ; the praeocular spine is strongand curves upward ; there is also a strong postocular spine, whichhas a tooth on its posterior margin ;posterior to this, on the sidesof the carapace, is another small spine. On the inferior surface ofthe carapace (on the pterygostomian region^ are three tuberclesarranged in an oblique line ; and posterior and parallel to these anoblique crest, which terminates in a tooth or short spine. There isa strong tooth directed downward on the interantennal septum, and* Vide Hist. Nat. Crust, i. p. 316 (1834).