. Studies on marine ostracods : pt. 1, Cypridinids, halocyprids and polycopids. margin of the shell is, however,rather irregular, often even more irregular than in the accompanying figure 3. The spine-bearinglist is provided with about 43—52 hyaline spines varying somewhat in size. There are usuallyno bristles at all between the most ventrally situated of these spines; between each of the othersthere are usually one or two, sometimes even three, short bristles varying somewhat in the spine-bearing list and the posterior margin of the shell there are no broad poressuch as are fou
. Studies on marine ostracods : pt. 1, Cypridinids, halocyprids and polycopids. margin of the shell is, however,rather irregular, often even more irregular than in the accompanying figure 3. The spine-bearinglist is provided with about 43—52 hyaline spines varying somewhat in size. There are usuallyno bristles at all between the most ventrally situated of these spines; between each of the othersthere are usually one or two, sometimes even three, short bristles varying somewhat in the spine-bearing list and the posterior margin of the shell there are no broad poressuch as are found in A. spinifera. First antenna (fig. 4): — This is very like this limb in A. Mulleri There are,however, some differences to be noted: The third and fourth joints together form an almostquadratic joint, about as long as or rather slightly shorter than the total length of the fifth andsixth joints. The distal boundary of the fourth joint is moderately concave. The longestposterior distal bristle of the fourth joint is shorter than the total length of the fifth and sixth. Fig. XCI. — A^lcropcOkUni n. +. — 1. Shell sciii Vrnin Ihi side; 2fi X. 2. Shell seen Ilom below; 2i , of the right, valve seen from inside; 120 X. 4. Left first antenna seen from oulsiiie; 128 X. T). Ric seen from inside; the cleaning bristles of the second endopodile joinl are not drawn: of llii^ lindi: liSfi X- Posic riormandible IlO X. fi. Endite of the coxale studies oil murine Ostracods 495 joints. The a-claw is smooth. The c-bristle has four or five, usually five filaments, thef-bristle has four or five filaments and the g-bristle has six filaments. Second antenna: — This is like that of A. Mullen. The fourth to the ninthjoints on the e x o p o d i t e liave basal spines. The e n d o p o d i t e is rather distinctlythreejointed; its end bristle is about as long as or slightly longer than the stem. Mandible: — Protopodite: Coxale: The scythe-shaped process (fig. 6) isvery like this
Size: 1429px × 1747px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectostraco, bookyear1920
