Discovery reports (1937) Discovery reports discoveryreports14inst Year: 1937 DEVELOPMENT OF EUPHAUSIA SUPERBA Table XV. Analysis of larvae with seven terminal spines on the telson from St. 639 45 Length of antennular flagellum Form of Telson. Length Rostral No. of spines in succeeding Remarks mm. spine mm. Micro Mandi- bular I St thoracic Telson units palp leg stage 5-46 0 0-21 5 a a a 7 5-91 0 0-25 6 a a a 7 Note I 6-00 0 0-27 6-5 a a a~b 7 6-o8 0 0-25 6 a-b a-b a-b 7 6-o8 0 0-29 7 a-b a a-b 7 6-12 0 0-29 7 b a a-b 7 6-13 0 0-29 7 a-b a a 7 6-21 0 0-27 6-5 â a a-b 7 6-21 0 0-27 6-5 b a a-b
Discovery reports (1937) Discovery reports discoveryreports14inst Year: 1937 DEVELOPMENT OF EUPHAUSIA SUPERBA Table XV. Analysis of larvae with seven terminal spines on the telson from St. 639 45 Length of antennular flagellum Form of Telson. Length Rostral No. of spines in succeeding Remarks mm. spine mm. Micro Mandi- bular I St thoracic Telson units palp leg stage 5-46 0 0-21 5 a a a 7 5-91 0 0-25 6 a a a 7 Note I 6-00 0 0-27 6-5 a a a~b 7 6-o8 0 0-25 6 a-b a-b a-b 7 6-o8 0 0-29 7 a-b a a-b 7 6-12 0 0-29 7 b a a-b 7 6-13 0 0-29 7 a-b a a 7 6-21 0 0-27 6-5 â a a-b 7 6-21 0 0-27 6-5 b a a-b 7 6-25 0 0-31 7-5 b a a-b 7 ' 6-25 0 0-31 7-5 b a a-b 7 6-25 0 0-29 7 b a a-b 7 6-38 + 0-29 7 b a a-b 7? 6-46 + 0-42 10 f e d-e 7? 6-75 + 0-38 9 g d d-e 7 The letters a-j in columns 5-7 afford reference to the nine larvae (Fig. 8), which were arranged according to increasing development of their appendages. Note I. The 5th pleopods are non-setose. Table XVI gives the results of ex- amination of sixty-one seven-spined larvae from St. 374. In addition to the degree of development as in the two previous tables, the lengths of the mandibular palp, ist thoracic append- age, and inner antennular flagellum are given both in millimetres and in the units (24 units = i mm.) actually em- ployed in measurement. The length frequency of all the seven-spined larvae from St. 374 is given in Table XVII, in which also is shown the number of specimens which will have seven and five spines in the . length classes ,. __, , Fig. 9. Length frequency of seven-spined larvae from St. succeedmg stage. The results are \, ,wu ⢠ji r> â a ° o 374. , all the seven-spmed larvae, is, seven-spmed larvae shown graphically in Fig. 9. in which the telson form in the succeeding stage can be dis- The length frequency distributions tinguished. succeeding stage seven-spined. of the mandibular palp, ist thoracic succeeding stage five-spined. appendage and inner antennular flagellum, are stated below in Table
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