3i 



in the male the far end of then- 2nd joint : in addition to the small isolated 

 epigastric spine it has 11 to 13 dorsal teeth. There is no post-rostral carina 

 behind the gastric region. No orbital tooth. Post-antennular spine moderate, 

 its buttress indistinct. A strongish branchiostegal spine at the antero-inferior 

 angle of the carai:)ace. The deep-cut cervical groove is continued right up to 

 the branchiostegal spine, and the ridge defining this anterior part of the 

 cervical groove is continued backwards in a sinuous course to the posterior 

 border of the carapace, thus forming a prominent boundary to the entire bran- 

 chial region. Hepatic spine moderate : the subhepatic groove (posterior branch 

 of cervical groove) is almost as well marked as the hepatic fossa. There are no 

 sidures on the carapace. 



The 6th abdominal somite is nearly twice as long as the 5th. On the telson 

 there are 3 pairs of (distant) marginal spinelets in addition to the fixed pair. 



In the female the antennular flagella are a little longer than the peduncle : 

 in the male the outer flagellum is nearly twice this length, and the shorter inner 

 fiagellum has its base looped in a stiff semicircle, the distal end of the loop 

 ending iu a recurved tooth. 



The andricum is symmetrical and is of the same open-pod-shaped form 

 seen in the species of Peneus proper. It consists of two lobes, finely interlock- 

 ing along their anterior edge only, and having the opposed surfaces concave. 



The thelycum consists of a transverse, heart-shaped or semicircular lobe 

 lying between the 4th pair of legs, and a pair of lateral somewhat ear-shaped 

 lobes abutting on the 5th pair of legs. 



The female may reach a length of 5^ inches. 



The collection includes 76 specimens, registered as follows : — 



9131-80 ^ 

 Q — Oif Pulicat (Madras) 133, and 145-250 fathoms. } 



6730-31 o / T. I 



^ S. of Port Blair, Andamans, 188-220 fathoms. }> " Investigator." 



2589-95 



— Iq — N. of North Andaman I., 370-419 fathoms. 



Paeapeneopsis Wood-Mason MS. 



Alcock, Cat. Indian Deep Sea Crust., 1901, p. 14. 

 Type: P. stylifera, Edw. 



Rostrum toothed dorsally only. Antero-inferior angles of carapace sharp 

 or dentiform. Post-antennular sulcus defined only ventrally. 



Carapace with longitudinal and transverse sutures as in most Parapenei, 

 but the longitudinal suture never reaches the posterior border. 



Antennular flagella either long or short. Endopodite of maxiUules (1st 



X 



y 



/ 



