206 ME. STANLEY W. KEMP — BISCATAN PLA^'KTON : 



All the specimens Avere taken in approximately the same locality, between latitude 

 46° 43' to 47° 29' North, and longitude 7° 15' to 8° 18' West. The soundings in this area 

 are 2000 fathoms or more. 



MACRURA. 

 Amalopen^us elegans, Smith. 



Examples of this species are present in two hauls, the nets fishing between 350 fathoms 

 and the surface (36 I), and between 1250 fathoms and the surface (27 a). Three small 

 specimens were taken ; two measure only 11"5 mm., and the third is broken. 



Fragments of two individuals, which almost certainly belong to this species, occur in 

 another haul between 500 and 400 fathoms (35 i). 



Sergestes arcticus, Kroyer. 



Eighteen examples of this well-known N. Atlantic form are present in the collection ; 

 they range in size from 8 to 27 mm. : the smaller specimens have evidently only recentlj"^ 

 emerged from the Ilastigopus stage. One individual measuring only'14 mm. possesses 

 antennae 54 mm. in length. 



All the specimens whicli can definitely be referred to this species were caught between 

 100 fathoms and the surface, some actually at the surface. Fragments, in all probability 

 of S. arcticus, are present in nets fishing between 200 and 100 fathoms, and between 

 500 and 400 fathoms. 



Larval Sergestid^. 



Two Acantliosoma larvae and several Elaphocaris were caught, all in the upper strata 

 of the water. 



AcANTHEPHTRA PURPUREA, A. Milne-Edwards *. (PI. 14 and PL 15. fig. 1.) 

 A mature male, 81 mm. in length, was caught in haul 36 b between 100 fathoms and 

 the surface. The specimen may be referred to Coutiere's var. muUlspiiia ; the rostrum 

 bears ten teeth above and six below ; the carinae of the last four abdominal somites are 

 produced posteriorly as spines, that of the third being the longest, the other much shorter 

 and subequal. The telson is furnished on the right side with nine, and on the left with 

 ten, dorso-lateral spinules. 



More than fifty larvae of this species are present in the collection f ; they range in size 

 from specimens which can only just have left the Gg^ up to those which were described 

 by Couti^re under the name of parva. This autlior soon realised that he was dealing 

 with larval A. puipurea ; and in a paper published shortly afterwards (Bull. Mus. 

 Oceanogr. Monaco, No. 70, 1906) he gives a complete account of the development from 



* A full discussion of the somewhat lengthy synonj^my of this species will be found in my paper, " On the 

 Occurrence of Two Species of Acanlhephyra off the Coast of Ireland," Fisheries, Ireland, Sci. Invest. 1905, i. (1906). 



t In addition to those shown in the table of comparable hauls (pp. 216, 217), three specimens were taken in 

 21 d, 100 to fathoms. 



