240 D-K. G. H. FOWLEE— BISCAYAN PLANKTOK : 



nieti'i(;al gland is at the marked postero-vontral angle and is rather prominent. Ventral 

 boi'der a steady convex curve, rather flattened ; rostrum of the long flattened tyj)e of the 

 iiuhrimta and daphnoldes groups. The asymmetrical glands arc in the usual position : 

 on the anterior border are numerous long gland-cells which do not appear to meet in a 

 common opening ; they are particularly noticeable on the right shell. Frontal organ 

 strongly flexed ventrally, blunt, spineless. Antenna i.: the principal l)ristle carries 

 very numerous, long, fine spines as in the daphnoides group ; the two rows are widely 

 apart and the spines very divergent, directed proximally ; they are succeeded distally by 

 five or six short distally directed sjiines. The proximal accessory bristle carries about 

 10-15 pairs of very small spines, regularly set in pairs, on a level with the distal end of 

 the armature of the principal bristle. Antenna ii. as described and figured by Miiller 

 (ix. 27) ; the two basal bristles short, nearly equal in length. 



Eemale (2-0 mm.). — Shell very elongate; the height is to the length about as 

 1 : 2'5 ; it is of the same general contour as in the male *. Frontal organ as described 

 and figured by Miiller (x. 6). Antenna ii. with two central bristles, the shorter about 

 three-quarters of the longer : both hairless. 



Stage ? III. 



Male (1"5 mm.).— Shell rather fuller in front or less tapered than in Stage ? II. ; the 

 height is to the length about as 1 : 2*6. Otherwise much as in Stage ? II. Frontal 

 organ straight, constricted between the stem and the future terminal joint, but not 

 completely segmented ; terminal part swollen, ending in a blunt point directed slightly 

 downwards. Antenna i. with principal bristle of female character. Antenna ii. with 

 one basal bristle ; two central bristles as in Stage ? II. ; no hook -joint. 



CONCHCECIA KA.MPTA, MilUor. 



Tavo males, one of 2"5 mm., the other with broken shells, carried unmistakably the 

 characters of the first and second antennae of this species. There were about 48 pairs of 

 leaflets on the principal bristles, and the distal accessory bristle carried about 19 strong 

 teeth (not pairs). The stage would seem to be the same as that described by Miiller. 



CONCHCECIA LOKICATA, ClauS. 



=: loricata, var. ti/pica, Miiller. 

 = ctenophora, Miiller. 



(Plates 20, 21. figs. 127-138.) 



A nimiber of specimens Avere obviously referable to some member of the lorlcala 

 group, which includes only loricata, var. typica and var. minor, ctenophora, and (perhajis) 

 serrulata. So far as the ' Research ' specimens were concerned, serrulata was out of the 

 question by reason of the shell-form. 



The points in Avhich var. minor and ctenopliora difi'er from var. typlca are given very 



* Miiller states that his specimeus were " meist stark deformiert, zum Theil auf mikroskopisohe Priiparatc " : this 

 accounts for bis drawing of the female (xi. 25). 



