118 A. Alcock — New and Rare Species of Crustacea. [No. 2, 



Frontal margin sinuous, denticulate and spinate : orbital margin 

 smooth, or finely and faintly puckered : antero-lateral borders armed 

 with four spines (including the outer orbital angle) of which the last 

 but one has a tiny secondary spinule at its base. Two spines, side by 

 side, at the inner suborbital angle. 



External maxillipeds shaped like those of D. Mspida, the merus 

 being a very short broad joint, but having a perfectly smooth surface. 

 Anterior edge of buccal cavern smooth. 



Chelipeds, in the female, equal, hardly longer than the carapace : 

 a spine at the far end of the inner (anterior) border of the arm, and 

 some spinules at the far end of the outer (posterior) surface : upper 

 surface of wrist, hand, and base of dactylus spiny. 



Legs stout, not much shorter than the chelipeds : the anterior 

 (dorsal) border of their merus, carpus, and propodite, and the posterior 

 border of their dactylus, finely serrated : there are a few fine stiff hairs 

 between the serrations. 



Colours, orange or yellow ; most of the spines of the carapace, but 

 not of the appendages, are black. 



A single egg-laden female from the Andamans, 16 fathoms: its 

 carapace is only 4 millim. long. 



The species has been figured for a future issue of the Illustrations of 

 the Zoology of the Investigator. 



§ 3. On a new species of Latreillia and on Latreillopsis bispinosa. 



A new species of Latreillia was dredged in the Gulf of Martaban, 

 in 53 and Q7 fathoms. Its nearest relative is the Atlantic and Medi- 

 terranean L. elegans,- which it resembles in form and colouration but 

 from which it differs in the structure of the last pair of legs. These 

 have a long propodite plumed exactly like the vane of a feather, and a 

 very short dactylus. The species, which has been named L. pennifera, 

 will be described in the forthcoming fifth part of my Materials for a 

 Carcinological Fauna of India, and will be figured in a future issue of 

 the Illustrations of the Zoology of the Investigator, 



Latreillopsis hispinosa, described and figured by Dr. Henderson 

 in the Report on the " Challenger " Anomura, has hitherto been known 

 by a single imperfect female specimen, which was dredged off Zebu in 

 the Philippine Islands. 



Dr. Anderson has lately sent 3 specimens, namely, an adult male 

 and female and a young male, which were dredged off the east coast of 

 the Andamans at a depth of 53 fathoms (not the Gulf of Martaban, 53 



