51 



The " andricum " is of the same general character as that of S. biulcahM : 

 the most noticeable difference is, that one of the hooklets into which the middle 

 lobe splits up has a foliaceous base. 



(The external maxillipeds and 5th pair of legs are missing in the only 

 specimen). 



The branchial foramla is as follows : 

 Somites and Appendages. PodobrnncLiee. Pleurobrancliiro. 



Total l+2ep. 744 r. =8 + 4 r.+2 ep. 



Colour in life, lurid red. 



The carapace is 30 millim. long, the abdomen 60 millim. in the mid-dorsal 

 line. 



Arabian Sea, 1091 fathoms. 

 Regd. No. 5. 



Though very similar to it, this species is not identical with 8. mollis S. I. 

 Smith, as I have ascertained by comparison with one of the duplicates from the 

 TJ. S. National Museum. 



It differs from S. inollis, as Faxon has pointed out, in that the posterior 

 pleurobranch of somite XII is a functional gill-plume instead of a rudimentary 

 filament. 



26. Sergestes rubroguttatus, Wood-Mason. 



Sergeites rubroguttatus, Wood-Mason, Ann. Mag. Nat. Hist., Nov. 1891, pp. 354, 355, fig. 10 : Hanson, P. 7,. S. 

 1896, pp. 949, 955. 



ILLUSTRATIONS OF THE ZOOLOGY OF THE INVESTIGATOR, CRUSTACEA, PLATE XLI. FIG. 6. 



Rostrum strongly ascendant, subacute, arising from a well defined areola 

 of its own, only just overhanging the anterior border of the carapace. 



Gastro-hepatic groove very distinct in all its course. The cervical groove 

 not visible on the dorsum of the carapace. A very strong longitudinal ridge 

 runs from the antennal margin halfway along the carapace, where it meets two 

 equally strong ridges, one of which curves upwards and defines the branchial 



