LYSIANASSIDAE 37 



Remarks. No. i is recorded as being "bright scarlet". The present collection ex- 

 tends the known distribution in the Atlantic to 8° 47' W long., 45 S lat. and to 8° 12' 

 N lat. It would appear that the species is taken in lesser depths during the night than 

 during the day. 



Distribution. Atlantic : 36 S, 17J E, and off Cape Point, S. Africa. Indian Ocean, 

 off East London (South Africa). Pacific. 



Genus Metacyphocaris, Tattersall. 

 Tattersall, 1906, p. 29. 



The occasional presence of a rudimentary mandibular palp somewhat weakens the 

 reasons for the generic separation of this form from Paracyphocaris Chevr. The reduced 

 inner ramus of uropod 3, however, is an additional difference between the two genera. 



Metacyphocaris helgae, Tattersall (Fig. 5). 



Tattersall, 1906, p. 29, pi. iii, fig. 1, pi. iv. 



Stephensen, 1923, p. 54. 



Schellenberg, 1926 b, p. 216 and pp. 235, 238, 241, text-figs. 26 c, 



27; 1927, p. 666, fig. 60; 1929, p. 196. 



Pirlot, 1929 a, p. 8. 



Occurrence: 1. St. 78. South Atlantic. 2 immat. 11-12 mm. 



2. St. 8?. South-east Atlantic. 1 immat. 13 mm. „. ,, . , . , , 



n ™-i » 1 • ^ •. 1 ,, ,, rig. 5. Metacyphocaris helgae, 



3. St. 281. Mid-Atlantic. 1? with brood lamellae 17 mm., Tattersall Mandible of ?> 



1 immat. 13 mm (St. 281.) 



4. St. 287. Mid-Atlantic. 2 immat. 10-nmm. 



5. St. 296. Mid-Atlantic. 1 immat. 11 mm. 



Remarks. The large ? (no. 3) seems to be the first known specimen which is ap- 

 proximately mature. The brood lamellae are elongate linguiform, with setose margins. 

 It is also remarkable in that both mandibles retain a 2-jointed rudiment of the palp. 



The ventral surface in the smaller specimens is more or less bulging, a fact which 

 may indicate parasitic (blood-sucking) habits. 



The known distribution in the Atlantic is much extended by the above finds, viz. 

 to south of the equator (2 49' S) in the Gulf of Guinea, and to 35 S Mid- Atlantic. 



Distribution. Atlantic: 64 N-47 N, 1800-2800 m. 



Genus Paralysianopsis, Schell. 



Schellenberg, 193 1, p. 7. 



Barnard, 193 1, p. 425 (Ausfronisimus). 



Side-plate 1 not expanded below, 5 evenly bilobed. Pleon segment 3 with postero- 

 inferior angle produced, rounded. Telson short, ovate, with a short terminal notch. 

 Antenna 1 stout, 2nd and 3rd joints very short. Epistome straight, not prominent ; upper 

 lip produced in an acute process. Mandible with molar moderate, palp attached over 

 molar. Maxilla 1 , outer lobe with 7-8 spines, palp moderately slender. Maxilla 2, lobes 



