264 Transactions. — Zoology. 



which represents the internal lamella is very large, and com- 

 pletely rounds off the abdominal shield. 



Cassidlna neo-zealanlca, n. sp. (PI. XIY., figs. 1-4.) 



Body very flat, broadly elliptical in form, its breadth being 

 almost exactly two-thirds of its length. Head as long as two 

 anterior thoracic segments ; the orbits of the eyes are pro- 

 duced a little back into the succeeding segment ; frontal pro- 

 cess pyriform, covering the bases of the antennae. First and 

 2nd segments of thorax shortest in the median line, 3rd 

 and 4th longest, remainder becoming shorter posteriorly. 

 Abdomen about half as long as thorax ; last segment triangu- 

 lar, obtuse, and (along with lamella of last caudal feet) thickly 

 ciliated. 



External (inferior) antennae as long as cephalon and first 

 three segments of thorax ; peduncle 4-jointed, bearing several 

 setse, mostly all shorter than the diameter of the joints ; 2nd 

 joint rather the longest, 1st and 3rd subequal, shortest ; 

 flagellum 13-jointed, slightly longer than peduncle and tapering 

 off to the extremity. Internal (superior) antenuoB reaching to 

 penultimate joint of peduncle of the external pair; peduncle 

 3-jointed, destitute of set£e, all the joints somewhat flattened, 

 basal joint very broad ; flagellum two-thirds as long as 

 peduncle, 9- (10- ?) jointed, each joint bearing a jointed 

 (olfactory ?) seta. 



Internal lamellae of caudal feet rather narro%v, arcuate ; 

 external lamellae oblong, obtuse, hardly more than one-fourth 

 the length of internal lamellae. 



Colour brownish-grey, covered with black spots and star- 

 like markings. 



Length, 8mm. ; breadth, 5mm. 



Habitat. Creeping on kelp dredged from 10 fathoms in the 

 Bay of Islands. 



114. Cleantls tnbicola, mihi. (PI. XIV., figs. 5-8.) 



The following is a short description of this species, of which 

 only a preliminary notice in the "New Zealand Journal of 

 Science" (vol. ii., p. 577) has hitherto appeared. 



Body narrow, much elongated, with the sides perfectly 

 parallel. Cephalon with its lateral margin produced down- 

 wards into an angular lobe ; its front margin nearly straight 

 (transverse) ; its posterior margin produced backwards in the 

 middle into an excavation of the first thoracic segment ; eyes 

 rather narrow, placed near the sides of the head. First 

 thoracic segment subequal in length to the cephalon ; 2nd 

 rather shorter ; succeeding segments subequal, hardly exceed- 

 ing the 1st in length. Epimera of first four segments indis- 



