83 



ADDENDA. 



The three following deep-sea species, which have just come iu troiu the .ship, as part of the col- 

 lection of the present season (1898-99), have to be added. 



OxTBnrNCHA. 



Family Maiidos : Sub-familv Innc/iime. 

 GrETPACH^US, Alcock. 

 Orypachseus, Alcock, Journ. Asiatic Soc. Bengal, Vol. LXIV. Pt. ii. 189.5. j). 177. 



Carapace triangular, spiny, separated from the frontal region by a post-oeular " neck," not con- 

 cealing the first two abdominal terga even in the male. 



Rostrum spiny : composed of two short divergent spinelets, with a strong median deflexed (inter- 

 antennulary) spine, not visible from above. Eyes laterally projecting, movable, but not sufficiently 

 retractile to be ever concealed. Small supra-ocular and post-oeular spines are present as part of the 

 general spinature. Antennse dorsally exposed from the basal joint of the peduncle, which joint is long 

 slender cylindrical and spiny and is not intimately fused with the neighbouring parts. External 

 maxillipeds with the merus elongate, much narrower than the ischium, and not much broader than 

 the carpopodite. Legs hairy and spiniferous. Abdomen six-jointed in 5 , curiously short and truncated 

 in c?. 



Branchial formula apparently as is Enceplialoides. 



Grypachieus hyalinus (Alcock &. Anderson.) 



Ach^us hyalinus, Alcock & Anderson, J. A. S. B., Pt. ii. 1894, p. 205. 



Grypachsem hT/alinus, Alcock, J. A. S. B., Vol. LXFV. Pt. ii. 1S95, p. 177. pi. iii. figs, 4. in. 



Carapace sub-triangular, thin, vitreous, spiny especially in its anterior half : the regions well 

 delimited, and the post-ocular portion constricted to form a " neck." The gastric and branchial 

 regions, but more especially the latter, are particularly convex. 



The rostrum, as seen from above, ends in two short spines, each of which has a spine or two at 

 its base ; but from in front or from below it shows as a strong vertically deflexed (interantennulary ) 

 spine. 



The eyes are large ; and the long eye-stalks, which bear one or two tubercles on their front sur- 

 face, are movable backwards, and are exposed from their base in all positions. The antennae are 

 visible, dorsally, from the end of the basal joint of the peduncle, which joint is long, slender, cylin- 

 drical and spiny. 



The external maxillipeds are large, hairy, and almost jiediform, owing to the narrowness of the 

 merus and the coarseness of the palp. 



The chelipeds in the male are half again as long as the carapace and rostrum and are very much 

 more massive than the legs, and in the female are as long as the carapace and rostrum and not much 

 more massive than the legs : all the joints except the fingers are spiny. The fingers are much shorter 

 than the palm, which in the male is considerably inflated. 



The first three pair of legs are spiny and hairy, the hairs of the posterior edge being remarkably 

 long, stiff, close-set, and regular : the first pair are the longest, being in the m-ale rather more, in the 

 female rather less, than twice the length of the carapace and rostrum : the next two pair decrease in 

 length successively. The last pair, which aj-e also hairy, are the shortest of all, are subdorsal in posi- 

 tion, and are subchelate, the propodite having its near end dilated to receive the folded back dactylus : 



