180 Camacea: 24. Naanastacidae, 6. Cumella 



of 3 joiuts, the 3*^ minute, accessory minute, 2-jointed. Antenna 2, 1^*^ joint 

 large, 2"*^ and 'S^ small, each with apical seta, that on 2""^ joint very long. 

 Maxilliped 3, distal lateral angle of 2^^ joint not produced. Peraeopod 1, 

 2^^ joint slender, unarmed, 5*^ and 6**^ joints subequal; S*^ to 5*^ pairs rather 

 long and slender, 5*'^ joint about thrice as long as 6*^^. Peduncle of uro- 

 pods long and slender, thrice the length of the telsonic segment, the rami 

 subequal, a little over half the length of the peduncle. L. subadult, with 

 developing oostegites, 2'75 mm. 



(5. Seemingly near to Cumella abyssicoia (p. 184). Pseudorostral lobes 

 more oblique than in 9, less acute, only -i small teeth at antero-lateral 

 corner. Carapace with dorsal edge smooth, without teeth. Flagellum of 

 antenna 2 short. Peduncle of uropods about two and a half times as long 

 as the telsonic segment, less than twice the length of the rami. L. 24 mm. 



Off W. of Ireland, 77 miles W. N. VV. of Achill Head, county Mayo, depth 699 m, 

 64 miles N. W.V2 W. of Cleggan Head, depth 364 m. 



3. C. molossa Zimmer 1907 C. m., Zimmer in: Zool. Anz., ?;. 31 p. 370 | 1911 

 Cm., Caiman in: Tr. zool. Soc. Loudon, r. 18iv p. 344. 



Near C. gracillima (ur. 2), but less slender; the eye-lobe, though without 

 pigment or lenses, large, broad and well-developed, carrying a pair of postero- 

 lateral spines, the pseudorostral lobes not meeting in front of it, but keeping 

 apart, along with the cornet-shaped siphons. The carapace not quite twice 

 as long as the pedigerous segments combined, the antero-lateral margins 

 receding, the lower margin serrulate to the end behind the larger denticulatiou ; 

 traces of medio-dorsal teeth are present. Pedigerous segments 4: and 5 each 

 with a forward standing dorsal spine, the 5*^ with a spine on each side, 

 being in this respect resembled by the first 5 pleon segments. Pleon little 

 longer than preceding part of the body. Uropods broken. Colour white. 

 L. Q about 4 mm, 6 unknown. 



German south Pole Exp., Winter station lat. 66» 2' S., long. 890 38' E., depth 385m. 



4. C. forficula Calm. 1911 C. /"., Caiman in: Tr. zool. Soc. London, n I8iv 

 p. 341, 344, 345 t. 32 f. 1—6. 



9 . Pseudorostral lobes well produced, acute, meeting in front of the 

 prominent eyelobe; front margin receding, antero-lateral corner obtuse with 

 a minute tooth. Carapace compressed, with scattered hairs, dorsal line convex, 

 concave, and then briefly convex, front convexity with a forward curving 

 spine, so also the hinder but not always. Pleon a little shorter than pre- 

 ceding part of the body, telsonic segment the longest, inflated, arched above 

 and below, encreased in width backwards, obtusely extended between the 

 uropods. Eye well pigmented. Antenna 1 slender, 1-jointed accessory flagellum 

 minute. Peraeopods 3 — 5 slender, with elongate 5*^^ joint, which in the b^"^ 

 pair is four-fifths as long as the 2"*^ and more than twice the 4^^ joint. Uro- 

 pods very short, less than telsonic segment even including their indistinctly 

 defined apical spines; peduncle less than half as long as the telsonic seg- 

 ment, equal to the exopod, a little shorter than the endopod, spine in each 

 case included, these spines curving inwards like the tail-forceps of an earwig. 

 L. 1-7 mm. 



(S . Rather more slender and elongate than the 9; pseudorostral lobes 

 shorter, with the upper edge concave; carapace with dorsal line more level 

 and without spines, pleon segments 1 — 5 with lateral grooves; eye very 



