298 DISCOVERY REPORTS 



deeper shade of the same colour. Gastric and hepatic organs faintly visible as a brownish 

 mass. A red-brown patch near postero-inferior angle of eyes". 



Distribution. Mediterranean; Atlantic, 51^° N-31 N and 35 S; Indo-Pacific. 



Platyscelus armatus (Claus). 



Claus, 1887, p. 36, pi. ii, figs. 3-15. 

 Stewart, 1913, p. 258. 

 Spandl, 1927, p. 229, fig. 45. 

 Occurrence: 1. St. 268. South-east Atlantic. 1 ovig. $ 14 mm. 



2. St. 285. East mid-Atlantic. 2 ?? 13 and 16 mm., the larger with embryos. 



Distribution. Warm seas (Spandl); 15 45^' S, 33 n|' W (Stewart). 



Platyscelus inermis (Claus). 

 Claus, 1887, p. 37. 

 Stewart, 1913, p. 258. 

 Stephensen, 1925 a, p. 252. 

 Spandl, 1927, p. 232. 

 Occurrence: 1. St. 276. East mid- Atlantic. 5 ?? 7-10 mm., the largest one ovig. 

 2. St. 297. East mid-Atlantic. 5 $$ 10-11 mm., some with embryos. 



Remarks. These specimens may belong to this species, which has not been recognized 

 since it was described by Claus. Both Stephensen and Spandl follow Claus in thinking 

 it may be merely an unarmed variety of armatus. 



The present specimens agree with armatus except in lacking the sharp epimeral pro- 

 jections; though these parts are rather more bulging than in ovoides. The specimens are 

 smaller than armatus, but larger than serratulus, with which latter species also they are 

 in close agreement. 



Pleon segments 1-3 are dorsally somewhat gibbous, when viewed laterally, thus 

 further agreeing with armatus; in ovoides and serratulus the dorsal profile is quite even. 



Distribution. Atlantic. Mozambique. 



Platyscelus serratulus, Stebb. 



Claus, 1887, p. 37, pi. iii, figs. 5-14 (serratus, turn Bate). 

 Chevreux and Fage, 1925, p. 422, fig. 414. 

 Shoemaker, 1925, p. 51, figs. 20, 21 (dubius). 

 Barnard, 1930, p. 437. 

 Occurrence: St. 268. South-east Atlantic. 1 $ 6 mm. 



Distribution. Mediterranean; Atlantic 42 N-37 S; Indo-Pacific. 



Genus Hemityphis, Claus. 

 Stephensen, 1925 a, p. 219. 

 Spandl, 1927, p. 233 (key to the two species). 



Hemityphis rapax (M. Edw.). 



Stebbing, 1888, p. 1472, pi. clxxxiii (tenuimamis). 

 Stewart, 1913, p. 259 {tenuimamis). 

 Stephensen, 1925 a, p. 219 (tenuimamis). 

 Spandl, 1927, p. 233, fig. 46 (tenuimamis). 

 Barnard, 1930, p. 437. 



