. Cumacea (Sympoda). Cumacea. Cumacea: 11. Diastylidae, 5. Makrokylindrus 117 5. Gen. Makrokylindrus T. Stebbing 1912 Makrokylindrus, T. Stebbing in: Ann. S. Afr. Mus., v. 10v p. 129, 146, 150. Carapace denticulate; no distinct eye; telson elongate, basal portion cylindric, much longer than the post-anal portion, which carries only the two apical spines. Peraeopods of the female, so far as known, without rudimentary exopods on the third and fourth pairs. 6 species. Synopsis of species: I Telson distally serrate 1. M. serricauda ) Telson not distally serrate — 2. ( Carapace wiih transverse rais
. Cumacea (Sympoda). Cumacea. Cumacea: 11. Diastylidae, 5. Makrokylindrus 117 5. Gen. Makrokylindrus T. Stebbing 1912 Makrokylindrus, T. Stebbing in: Ann. S. Afr. Mus., v. 10v p. 129, 146, 150. Carapace denticulate; no distinct eye; telson elongate, basal portion cylindric, much longer than the post-anal portion, which carries only the two apical spines. Peraeopods of the female, so far as known, without rudimentary exopods on the third and fourth pairs. 6 species. Synopsis of species: I Telson distally serrate 1. M. serricauda ) Telson not distally serrate — 2. ( Carapace wiih transverse raised girdle — 3. " ) Carapace without transverse raised girdle — 4. ) Eyelobe distinct 2. M. fragilis ) Eyelobe wanting 3. M. cingulatus I I'edigerous segments .3 and 4 dorsally fused 4. M. dubius i Pedigerous segments 3 and 4 not dorsally fused — 5. _ j Pedigerous segments smooth .'i. M. erinaceus ^ \ Pedigerous segments spinose . 6. M. josephinae 1. M. serricauda (T. Scott) 1912 Diasfyiis s., T. Scott in: Sci. Invest. Fish. Scotl., 1911 nr. 1 t. I f. 1—4 | 1912 Makrokylindrus s., T. Stebbing in: Ann. S. Afr. Mus., vAOv p. 150. Near to M. josephinae (nr. 6) but distinguished by the telson. Pseudorostral lobes well produced to a blunt apex. Carapace dorsally strongly spinose and spinulose, lower margin pectinate for more than half its extent from the front. Pedigerous segment 5 the longest, its postero- lateral angles rounded. Pedigerous segments and pleon all dorsally rough with spicules, the pleon seg- ments also ventrally. Telson rather longer than peduncle of uropods, only slightly narrowing in the distal third, the sides of which are coarsely serrate, with intervening setules; "^/j if the apical spines stout, somewhat // /• divergent. Endopod of uropods slightly longer than the exopod, p. ^^ half as long as the peduncle, its M. serricauda (^) (T. Scott), telson and uropod. P* joint twice as long as the 2 subequal following joints combined; spines on
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