1476 THE VOYAGE OF H.M.S. CHALLENGER. 



Genus Paratyphis, Claus, 1879. 



1879. Paratyphis, Claus, Die Gattungen und Arten der Platysceliden, pp. 4, 13. 



1886. „ Gerstaecker, Bronn's Klassen und Oiduungen, Bd. v. Abth. ii. p. 483. 



1887. Paratyphes, Bovallius, Systematical List of Aniph. Hyper., Bihang till K. Svensk. 



VetenskAkad. Handl., Bd. 11, No. 16, p. 47. 

 1887. Paratyphis, Claus, Die Platysceliden, pp. 31, 39. 



For the original definition of the genus, see Note on Claus, 1879 (p. 491). Some 

 modification will be required for the inclusion of the species " Paratyphes Theeli" added 

 to the genus by Bovallius, for in that species " the short and weak chela-process of the 

 wrist," mentioned by Claus, is wanting to the second gnathopods, and the side-plates of 

 the third perseopods are without inner tooth-process. The new species, Paratyphis pro- 

 montorii, is also without any process of the wrist in the second gnathopods. 



For distinguishing the genus from the other genera of the family Typhidae, Claus 

 gives the characters : — 



" The First Gnathopods without, the Second with quite rudimentary, chela. The 

 two terminal joints of the hinder male antennae of moderate length." 



Paratyphis promontorii, n. sp. 



In general form agreeing with Paratyphis maculatus, Claus. 



Upper Antennae. — The peduncle and first two joints of the flagellum as in the species 

 just mentioned, the two terminal joints missing. 



Lower Antenna?. — Third (first free) joint of the peduncle curved at the base, about 

 half as long as the following joint, which is rather longer than the fifth ; the first joint 

 of the flagellum is more than half as long as the last of the peduncle, and the following 

 joint about as long as the third joint of the peduncle. 



Upper Lip forming an arched dome. 



Mandibles. — The trunk tolerably broad behind the palp, in front of it long and 

 narrow, with nearly straight upper and sinuous under margin ; the upper margin is 

 continuous with the projecting tooth of the cutting edge, which is divided into about 

 twenty minute denticles ; on the left mandible there is a secondary plate, similar to the 

 principal but rather smaller ; the first joint of the palp is the longest and broadest, but 

 not so long as the two following together ; the third joint is longer than the second, 

 slightly curved, not acute. 



First Maxilla 3 . — The four teeth near the top of the inner margin are very small ; the 

 apex of the plate is narrowly rounded. 



Second Maxilla?. — In these the apex appears to be acute. 



Maxillipeds. — The inner plate broader at the base than the length, with two little 

 embedded spinules at the centre of the slightly convex broad distal margin ; the outer 



