RED SEA AND INDIAN OCEAN COPEPODA. 40l 



the male is known, has the fifth pair of feet very like those 

 of the male Calanus darwini, and may easily be passed 

 over as only a form of the latter. 



Eucalanus subtenius, Giesbrecht. 

 Occurrence, Nos. 6, 7, 18. 



This species is closely allied to Eucalanus attenuatus, but 

 is distinguished by the form of the forehead and its smaller 

 size. It has hitherto only been found in the Atlantic and 

 Pacific Oceans. Prof. Cleve records it from the Malay 

 Archipelago. 



Eucalanus crassus, Giesbrecht. 

 Occurrence, No. 8. A night gathering. 



The female of this species is easily recognised by its 

 robust form and by the appearance of the thoracic segments, 

 which are clothed with fine hairs. The species is widely 

 distributed, and has been recorded from the Faroe Channel 

 by my father, Mr. T. Scott (XV. Ann. Rept, Fishery 

 Board for Scotland, Part III. (1897), p. 312), and from 

 the Moray Firth (XVIII. A.R., F.B.S., pt. III. (1900), 

 p. 382). Dr. E. N. Wolfenden also records it from the Faroe 

 Channel, (Jour. Marine Biol. Asso., N.S., Yol. VI., No. 3, 

 January, 1902). Dr. Giesbrecht records it from the 

 Atlantic and Pacific Oceans and from the Mediterranean. 

 It has also been recorded from the Malay Archipelago. 



Rhincalanus nasutus, Giesbrecht. 

 Occurrence, Nos. 8, 11. Night gatherings. 



There seems to be some doubt whether • this Copepod 

 should be regarded as a distinct species, or only a small 

 form of Rhincalanus gigas, Brady. The fifth pair of feet 

 of the female are very like those of R. gigas. Dr. 

 Giesbrecht's species measures 3'9 mm. to 5'1 mm. 

 (female), while Dr. Brady gives 8'5 to 10 mm. as the size 

 of R. gigas. R. nasutus appears to have a wide distribu- 



