■144 Cumacea: ] 7. Pseudocuiuatidae, 2. Schizorbynchus 



lateral corners nearly rectangular, front margin serrulate. Carapace with a 



pair of serrulate submedian carinae between the eyelobe and the middle, 



their hinder part flanked by crests wliich rising from 



the sides curve round so as to define medio-dorsally 



the branchial regions. Pedigerous segments evenly 



arched above. Pleon not very long. Telson sub- 



semicii'cular, the serrulate margin affording 2 decided 



teeth on each side of the narrowly truncate apex. 



Eyelobe short and broad, concavely truncate, with 2 



small corneal lenses, one at each corner. Antenna 1, 



"~"~ 2^^ joint longer than 1^*^ or S'^, wliich are subequal 



^^^•."^- , in length. Peraeopod 2 particularly short and stout. 



°caraimc^e. ^^^ Peduuclc of uropods equal in length to exopod, endo- 



pod a little shorter, with 5 spinules along the medial 



margin. Colour whitish. L. 9 under 5 mm. d unknown. 



Caspian Sea. 



3. S. bilamellatus (0. Sars) 1894 Pseudocuma bilamellata, Q. 0. Sars in: Bull. 

 Ac. St.-Petersb., ser. 4 u4 (v.36)p.326 1. 10,11 | 1900 Schizorhynchus bilamellatus, G. 0. 

 Sars, Crust. Norway, v. 3 p. 73. 



Body rather long and slender, integument moderately hard, squamose. 

 Pseudorostrum projecting in 2 thin oval lamellae some distance apart, point- 

 ing obliquely upwards, antero-lateral corners nearly rectangular in 9, more 

 obtuse in (5, front edge serrulate. Carapace with a pair of submedian carinae, 

 serrulate in 9, smooth in d, running from front of eyelobe to the middle, 

 flanked to the rear by crests which rising from the sides abruptly turn so 

 as medio-dorsally to define the branchial regions. Pedigerous segments not 

 carinate. 2"'! and 3^ dorsally short, much expanded at the sides, ^^^ and b^^ 

 dorsally large, 5**^ with hind corners a' little extended backwards. Pleon 

 rather elongate. Telson square, length and breadth being equal, but hind 

 angles rounded off. Eyelobe broad, with front corners rounded, especially in 

 d which has 3 corneal lenses, while the 9 has only 2, one at each corner 

 of the lobe. Antenna 1, 2 »<^ joint longer than 1^*, 3^ than 2°'^. Upper lip 

 distally narrowed, distal border emarginate. Peraeopod 1 rather slender. 

 Peraeopod 2 with 5^^ joint in 9 a little longer than the 2 preceding joints 

 combined, but in d more than twice as long and more setiferous, the 7*'' 

 joint in d a little curved and distally armed with 5 retroverted teeth. Pe- 

 duncle of uropods in 9 as long as the equal rami, rather shorter than the 

 rami in the d, the endopod in both sexes having the medial margin closely 

 fringed with spinules. Colour whitish. L. 9 9 mm, d 10 mm. 



North Caspian Sea. 



4. S. abbreviatus (0. Sars) 1897 Pseudocuma abbreviata, G. 0. Sars in: Annuaire 

 Mus. St.-Petersb., v. 2 p. 283 t. 14 f. 9—12 | 1900 Schizorhynclms abbreviatus, G. O. Sars, 

 Crust. Norway, v. 3 p. 73. 



Body short and compact. Pseudorostrum rather short, a deep exca- 

 vation separating its rounded processes, which laterally lead by a 

 shallow emargination to the serrulate rounded antero-lateral corners. Cara- 

 pace deeper than wide, slightly narrowed to the rear, without longitudinal 

 carinae and the branchial regions not sharply defined. Pedigerous segments 

 smooth. Pleon short and narrow, telson semicircular. Eye composed of 3 

 corneal lenses in a transverse row on the short broad eyelobe. Antenna 1, 



