MARINE CRUSTACEANS. 707 



The frontal lamina is pentagonal. The mandibles, as usual in this family, are very firmly 

 attached to the lower lip, and have their free ends closely clipped in by the short upper lip. 

 The trunk of the mandible, besides having a curved margin, makes a rather strong bend of the 

 whole plate near the narrowed centre. The apex has no well-defined uncinate tooth as in 

 Corallana and Excorallana, but some ill-defined dentations, accompanied by a row of spine-teeth, 

 which on one of the mandibles point backward. The palp is attached near the base, and has 

 the middle joint the longest. 



The outer plate of the first maxillae ends in a single, very long, strongly curved spine, 

 which is only seen in its natural shape when the trunk of the maxilla is set more or less 

 edgewise. 



The second maxillae are nearly a.s in L. kroyeri, Hansen, the broad ' lacinia of the second 

 joint' being surmounted by an almost linear third joint which here cames a short seta in 

 addition to the long one described for L. kroyeri. 



The maxillipeds have the second joint a little longer than wide, the third, fourth, and 

 seventh joints small, and the fifth and sixth not very large. 



The first gnathopods have the second and third joints channelled, the third carrying 

 a long spine on the front apex and a stout one on the hinder, the fourth joint is bordered 

 with five stout spines, the apical much the largest ; the fifth joint is hidden between its 

 neighbours ; the sixth is not strongly armed ; the finger is large, and by help of its long nail 

 strongly curved. The second gnathopods scarcely differ from the first in structure, except 

 that the fifth joint is rather more conspicuous. The first peraeopods are like the second 

 gnathopods. The four following pairs are successively longer, otherwise agreeing closely together 

 in structure, the second joint broad, broadest in the fourth peraeopods, the fourth joint with 

 the hind apex broadly produced, the third to the sixth but especially the fifth furnished with 

 numerous spines on the apical border, the sixth joint short, a little longer than the strongly 

 curved finger. 



In the second pleopods the male appendage has an acute apex, not nearl}' reaching the 

 end of the ramus. 



The inner branch of the uropods reaches beyond the telsonic segment ; it is fiinged with 



plumose setae and has nine spines on the broadly rounded distal margin. The much narrower 



outer ramus does not reach beyond the telsonic segment; it carries eight spines among a 

 fringing of long setae. 



The colour is light, speckled with scattered flecks of brown. 



Length a little under 7 mm., by a breadth of nearly 3 mm. Another specimen, smooth- 

 headed, but apparently of the same species, was 4'.5 mm. long by 2 mm. broad. 



Locality. Mahlosmadulu Atoll, at 20 fathoms, on coarse sand and rubble. 



The species is named out of respect to Mr Stanley Gardiner, by whom it was obtained. 



6. Lanocira rotundicauda, n. sp. PI. L A. 



There is so much resemblance between this and the preceding species that, when the 

 points of difference have been noticed, the question will still remain whether they may not 

 possibl}' depend on difference of sex and age in the specimens examined. 



The form about to be described was a female carrying numerous young ones, with their 

 dark eyes showing conspicuously through the marsupium. 



G. II. 91 



