252 Part III, — Tenth Annual Report 



modified, and forming powerful grasping organs in the male ; posterior 

 antennae, with the primary branch three- or four-jointed, secondary branch 

 very small, one-jointed. Mandibles well developed, and possessing a two- 

 branched palp. Maxillae small. Anterior foot-jaw with several marginal 

 setiferous processes. Posterior foot-jaw small, feebly clawed. All the 

 five pairs of swimming feet two-branched; both branches of the first pair 

 two-jointed, the inner branch longer than the outer, first joint of the 

 inner branch elongate, the last very small and imperfectly hinged ; the 

 outer branches of the second, third, and fourth pairs three-jointed, the 

 inner branches two-jointed and shorter than the outer. Fifth pair 

 foliaceous. The abdomen in the female four, in the male five jointed. 



Paramesochra dubia, n. sp. (provisional name). (PI. XII. figs. 18-32.) 



Females — Body subpyriform ; length about "65 mm. The postero- 

 lateral angles of the cephalo- thoracic segment spiniform and produced 

 backward beyond the next somite ; two lenses — one on each side near the 

 postero-lateral angles, as shown in the figure- — can be easily made out with 

 a ^th or ^th inch objective. Anterior antennae short ; seven-jointed basal 

 joint very large and stout, the upper distal angle produced so as to form 

 a stout prominent tooth, the remaining joints small) the proportional 

 lengths of which are as shown in the formula 



12'4-4'3'2'3'3 > 

 1-2-3-4-5-6-7* 

 Posterior antennae three- (or four 1 ?) jointed; secondary branch small, slender, 

 one-jointed. Mandible well developed, consisting of a biting part (the 

 apex of which is armed with several long teeth) and a two-branched 

 palp — one branch three- the other one-jointed^ Maxillae small, with a 

 lateral two-jointed lobe, serrate at the apex, and an intermediate appendage 

 furnished with two short terminal hairs. Anterior foot-jaw four-jointed, 

 with several marginal setiferous processes ; posterior foot-jaw three-jointed ; 

 last joint very small, and armed with three nearly equal setae. All the 

 five pairs of swimming feet two-branched ; both branches of the first pair 

 two-jointed; the outer branch of the second, third, and fourth pair three- 

 jointed; the inner branch two-jointed; the first joint of the inner branch 

 of the first pair elongate; the last very small and imperfectly hinged; 

 inner branch longer than the outer one, the inner branch of the following 

 three pairs shorter than the outer. The fifth pair foliaceous ; basal joint 

 large, its inner lobe with one plain and one plumose terminal seta. The 

 exterior lobe, which is small, is also furnished with two small setae ; the 

 second joint with four stout marginal hairs. Abdomen four-jointed ; first 

 segment large, composed of two coalescent joints ; the last segment very 

 small. Caudal stylets longer than the two last abdominal segments, and 

 about six times longer than broad, furnished with one very long and three 

 short unequal terminal hairs. 



Male. — Rather smaller than the female ; length about "6 mm. An- 

 terior antennae forming powerful prehensile organs. The basal joint 

 of the fifth pair of swimming feet much smaller than in the female, and 

 wanting the two setae. Abdomen five-jointed. With these exceptions 

 the description of the female is equally applicable to the male. 



Habitat. — Firth of Forth, west of May Island, February 1892. Several 

 specimens were obtained. 



Tetragoniceps (?) maleolata, Brady. (Plate VIII. figs. 11, 12.) 



A Copepod answering to the description and figures of Tetragonieeps 

 maleolata, except in the two following particulars, was obtained in 

 material dredged off St Monans. 



