NEW BEITISII AMPHIPODA. 41 



larger ones near the apex ; the rather longer straight inner ramus has a little spine at 

 the extremity. 



Telson triangular, as broad at the base as the length, the upper angles and the apex 

 rounded, each margin carrying a setule near the apex ; the telson reaches about halfway 

 along the peduncles of the third uropods. 



Length an eighth of an inch. 



Locality. Clyde. Obtained in some numbers at a depth of 20 fathoms, off Fairlie 

 Perch, in February 1889. 



Remarks. The specific name is derived from Cumbrae, an island in the Clyde. This 

 species makes some approach to Podocerus minutus, Sars, but is clearly distinguished 

 from it by the three-jointed flagella in both pairs of antennse, by the small concealed 

 first pair of side-plates, the hand of the second giiathopods in the female not excavate, 

 and the large tooth of that hand in the male being simple instead of double-ended 



EXPLANATION OF THE PLATES. 



PLATE V, 



A. Sophrosyne rohertsoni, n. sp. 



The full figure is given in lateral view, with a line above it indicating the natural size. 



a.s. Upper antenna. mx. 2. Second maxilla. 



a.i. Lower antenna. mxp. Maxillipeds. 



m. Mandible. o.t. Triturating organ, from the stomach. 



mx. 1. First maxilla, the palp imper- gn. 1. First gnathopod. 



feet. gn. 2. Second gnathopod. 



^rp. 2, 3, 4, 5. Second, third, fourth, and fifth perseopods respectively. 

 sp. of pip. Coupling-spines and a cleft spine of a pleopod. 



ur. 1, 2, 3. First, second, and third uropods respectively, the telson being shown in 

 combination with the second and third uropods. 



B. Syrrho'e fimhriatus, n. sp. 



a.s. Upper antenna. a.i. Lower antenna. 



m.m. The right mandible, with the palp imperfect, and a portion of the left mandible. 



gn. 1. First gnathopod. gn. 2. Second gnathopod. 



prp. 1, 2, 3, 4, 5. First, second, third, fourth, and fifth perajopods respectively. 

 pip. 1. First pleopod. 



Pl.s. 3. Lower lateral portion of third segment of the pleon. 

 ur. 1, 2, 3. First, second, and third uropods respectively. 

 T. Telson. 

 VOL. XIII. — PARTI. No. 6. — January, \%^'\.. G 



