﻿COPHrODA 



45 



1905- — — _ Kstcrlv, i>. 137, fig. ic. 



1905. — — — W'olfendcn, p. 996. 



1906. — — — Pearson, p. 8. 

 1908. — — — Karraii, p. 22. 



1908. — — — V. Brenitii, p. iS fig. 14. 



1902. Rhincalami.s gigas Brady. Th. Scott, p. 450. I 1905. Rliincalaiius iiasutus f'.iL-sl)r. G. C). Sars, p. 2. 



1902. — nasutus Giesbr. C. O. Sars, pp. 15-16 pis. 1 1905. — — Th. Scott, p. 222. 



VI VII. 



1903. — — — J. C. Thompson, p. 16. 

 1903. — — — Thompson & Scott, p. 242, 

 1903. — — — Norman p. 135. 



1903. — — — Cleve, p. 36.S. 



1904. — — — Wolfendeii, p. 128. i909- — g'K-'i*' Brady. Scott, pp.24- 25 



1904. — — — Cleve, p. 196. igio. — nasntus Giesbr. l^'arraii pp. 18—19. 



1905. — — -- Farran, p. 30. 



Description i'^. Tlie females examined \'aried in size from 4-5 to 5 mm. When lliis characteristic 

 sjjccies is examined in lateral view, a marked difference is observed Ijetween the different specimens in the 

 outline of the head; in some animals a distinct pointed eminence is seen just in front of the insertion 

 of the antennidae, in others the outline in more even as figured by Sars; the size of this eminence 

 is probabh- dependent upon the preservation of the animal and the position of the antennulac in tlie 

 moment of death. Tlie structure of the limbs is scarcely different from Giesbiecht's description. 

 In the exterior margin in the middle between Se I and II of the Re II fNJ III in the first pair of legs 

 a small incision with a circidar pore(?), through which a minute conical eminence jjrojects, is seen 

 (glandular pore?). In the three last pair of legs I have not been able to find secretory pores with 

 certainty. 



As seen in Sars' figure the hibnoii. which is widely removed from the insertion of the anten- 

 nulae, is saddle-shaped and b\' a median line di\'ided into an anterior and a posterior division (fig. 4a). 

 On the oral surface of the lalirum, on each side almost attaining the middle, a row of fairly 

 long stiff hairs are found in addition to six short stout setae, more alike granules, in the middle partly 

 fused with transverse groups, and two posterior groups of partly sickleshaped spines, between which 

 large group of stout teeth are found (cf. PL I fig. 4e). The lamina labialis consists of a median and 

 two lateral divi.sions (fig. 4 c). In front of this we have laterally an inwards convex series of fairly 

 long bristles; the inner longitudinal row is posteriori)- represented by row of rather short spines or 

 granules and anteriorly with irregular group of similar spines. Behind the lamina labialis and between 

 the serrula 6-dentata the setae are arranged as figured. The lobus labialis po.ssesses 4 longitudinal 

 series or groups of hairs, which posteriorly and inwards are fused into a big irregular group of hairs, 

 extending between the two lobi. 



f(?. Size: 3-8 to 4-5 mm. The head is less produced in front of the rostral filaments. The ab- 

 domen, which is one fourth of the length of the anterior division consists of five .somites; the first one 

 is dorsally and posteriorly produced into a distinct sjjine, corresponding to that found in the genital 

 somite of the female. The two first segments of the antennulac are well separated. The antennae 

 (cf. Pi. I fig. 4f) are more clumsy than those of the female, and .so are the mandibulae, which have 

 a well developed manducatory lobe. The maxillulae, maxillae and maxillipeds, especially the 

 latter, which have the second basal segment scarcely twice instead of three times as long as wide, are 

 more clumsy than in the females, but scarcel>- less adapted for manducator\- purposes. The mouth and 

 its surroundings are scarcely different from those of the female; the single specimen whicli I examined 

 had tlie spinulation of the labrum less coarse tlian in the female. The natatory legs are .scarcely 

 different from those of the female. The internal sexiud organs are found on llu- left side. 



