﻿54 



COPEPODA 



Distribution. This species has been recorded from the Mediterranean, the Indian Ocean, the 

 Pacific and the Atlantic. It has been found several times in the Foeroe channel and on the west 

 coast of Ireland as far north as 56°ii L. N. 9°50 L. W. 



Paracalanidae. 



Paracalanus parvus Clans. 

 (Text-figures 12 a — f). 



1S63. Calaiius parvus 11. sp. Claus, p. 173. 

 1864. Paracalanus parvus Claus. Boeck, p. 233. 



1S92. 

 1892. 



1894? 



1S9S. 

 1S98. 

 1899. 

 1899. 

 1900. 

 1900. 

 1901. 

 igoi. 

 1 901. 

 1902. 

 1902. 

 1902. 



1903- 



Canu, p. 169, pi I, figs, i — 12. 

 Giesbrecht, pp. 164—171, taf. 



I, 6 and 9. 

 Th. .Scott, pp. 26—27, pl- I 



figs. 9-14. 

 Aurivillius, pp. 29 — 30. 

 Giesbrecht & Schmeil, p. 24. 

 Th. Scott, p. 24S. 

 Brady, p. 32. 

 Th. Scott, p. 3S3. 

 Wheeler, p. 16S, figs 6a— c 

 Th. Scott, p. 350. 

 Cleve, p. S. 

 Brady, p. 32. 

 A. Scott, p. 402. 

 Wolfeuden, p. 361. 

 G. O Sar.s, pp. 17—18 pis VIII 



—IX. 

 Jensen, Johansen and Levin- 

 sen, p. 303, tabel I. 



1903. Paracalanus parvus Claus. J.C.Thonipson&A Scott, p. 243 



1903. — _ — Cleve, p. 367. 



1904. — — — Cleve, p. 194 



1904. — — — Wolfenden, pp. 129 — 130. 



1905. — — — var. borealis n. var. Wolfenden, 



pp. 997— 99S, pi. 96 figs 7 — II and 16. 



1905. — parvus Claus. G. O. Sars, p. 2. 



— — — Farran, p. 30. 



— — — Esterl}', pp. 140— 4i,figsi2a — e. 



1906. — — — var. perplexus 11. var. Norman 



& A. Scott, p. 127 pi XII figs. I — 2. 



1906. — parvus Claus. Pearson, p. 8. 



1906. — — — T. Scott, p. 298, 



1908. — — — v. Bremen, p. 20 fig. 17. 

 190S. — — — I-arran, p. 22. 



1909. — — — A. Scott, pp. 27—28. 



1910. — — — Farrau, pp. 61 — 63. 



1910. — — — Kraeeft, p. 77, taf. i figs. 



I-J3- 



1910. — — — Steuer, p. 22. 



1912 — — — Sewell, p. 35S. 



Description, f^. Size: 084 — i-o mm. 



In contrast to Giesbrecht the head and the first thoracic somite are completely fused. The 

 niouthlimbs are scarcely different from (iiesbrecht's description. In the structure of the natatory 

 legs, however, fairly well marked differences are found, especial!}- in the armatures of the basipodites 

 and endopodites; in these respects the>- fairly well agree with Sars' description, but especiallj- with 

 that given by Wolfenden for his P. parinis variet. borealis. In Sars figure, PI. IX, the first segment 

 of the exopodite of the first pair of legs has a minute spine; in all my specimens this spine is sub- 

 stituted for by a bundle of fine hairs as seen in Giesbrecht's Taf. 9 fig- 31. Glandidar pores are ob- 

 served at the base of the exterior spines of the exopodites (at least in the second pair of legs). 



Between the mouth and the rostral filaments the usual elevations are found; I was not able 

 to see any setae along the hinder margin of the labrnm. The arrangement of hairs on the oral sur- 

 face of the labrnm is similar to that of Psaidocalanus. The first group, which is convex outwards, 

 and oblique, consists of about 10 short hairs in a single row; tliis group is followed by an almost 

 straight row of about 25 ver\- short hairs; most orally, and fairh' well separated from this group, 20 

 hairs are placed in a S-shaped group. Laterally to the first group two partly transverse groups of 



