106 Cumacea: 11. Diastylidae, 1. Diastylis 



not elongate. Maxilliped 3, 2°<^ joint not expanded or produced distally. 

 Peraeopod 1. 2^^ joint much bent, not as long as rest of limb. 5*^ joint 

 slightly longer than 7*^ 6^^ than b^^. Peraeopod 2, 5*^ joint subequal to 

 6^^ and 7*^^ combined, 7^^ longer than H^^. 3*^ and 4*^1 pairs without exo- 

 pods. Exopod of uropods a little shorter than the telson. a little longer 

 than the endopod, of which the 1^* joint is about twice the 2"'^ or 3*^, with 

 3, 1. 1 spines on the medial margin of the joints respectively. L. o 9-5 mm, 

 d unknown. 



Cape Smyth, Alaska, depth 5 m. 



30. D. anomalus Bonnier 1896 D. anomalu, J. Bonnier in: Ann. Univ. Lyon, 

 v.2(3 p. 555 t. 30 f. 4a— p. 



Pseudorostral lobes well produced, each with subapical spinule, antero- 

 lateral corners obsolete. Carapace with height nearly equal to breadth, eyeless 

 eyelobe well developed, surface diversified with numerous denticles small 

 and large, 3 strong ones on the medio-dorsal line, a pair set l)ack on the 



Fiff. 61. 

 D. anomalus (9; Bonnier. 



pseudorostral lobes and 3 other pairs on the sides of the carapace, lower 

 margin with anterior half serrate. Pedigerous segments covered, especially 

 on the medio-dorsal line, with prominent strong spines, the 5*^ with 3 dorsal, 

 2 lateral, and 1 medio-ventral. Pleon segments 1—4 also armed with strong 

 spines. 6^1 with 3 pairs: telson with 3 pairs lateral and a stronger apical pair. 

 Antenna 1 short, both flagella 3-jointed. Antenna 2 of 4 short joints. Maxilli- 

 ped 3. 2°d joint distallv expanded. Peraeopod 1, 2"^ joint spinose, much shorter 

 than rest of limb. 5*^ a little shorter than 6^^, a little longer than 7*^, 

 Peraeopod 2. 2"^^ and 3*^ joints each armed with 2 strong spines, 1^^ joint 

 only a little longer than the 6'^^. 3^ and -^^^ pairs without exopods. Peraeo- 

 pod 5 entirely wanting, but this may be a juvenile character (see Leptoslijlis 

 mancm p. 123). Peduncle of uropods rather longer than the telson. rather 

 less than twice the exopod. rather more than twice the endopod, of which 

 the Pt joint is a little longer than the 3^. the 3^ than the 2°^ with spines 

 on the medial margin respectively 2, 1. 1. L. Q juv. scarcely 9 mm. 



Bay of Biscay, depth 950 m. 



31. D. asper Calm. • 1912 D. aspera, Caiman in: P. U. S. Mus., «;.41 p. 605, 647 

 tf. 66—69. 



