50 



GOÉS, RETICULAEIAN RHIZOPODA OF THE CARIBBEAN SEA. 



Fig. 52 is a mixed form from Nod. calcar and Nod. legumeii. It has been fa- 

 voured with many names, as Cristellaria Hildesiensis Röm.; Crist. Saulcyi d'Orb., Crist. 

 Marcki Rss., Crist. infläta Rss. etc. 



Fig. 53 represents a peculiar raonstrosity; a full-formed Nod. calcar turning 

 back inte Nod. legumeii. 



Figg. 54—56 are d'Orbigny's RobuHna aculeata of 1826 and his Rob. calcar of 

 1846. The larger one is from the chalk-bottom, the smaller from the coralline-gravel. 



Figg. 57 — 59 has been named Crist. inornata, austriaca d'Orb., Crist. tangentialis 

 Rss. etc. It is provided with a very thin and broad wing or keel and could also be 

 referred to Crist. cultrata Montf.; but this appendage is met with throughout all the 

 varieties and is not peculiar to any of them. From the chalk-bottom. 



Figg. 60 — 61 are monstrosities with luxuriant alar- and umbilical processes. 

 From coralline-gravel. 



The regular, typical form, rotulata Lmk., is the most abundant and the stoutest 

 of all our forms (3 — 5 mm.). 



Cristell. rotulata 



a) 1 ?e v i s ; 



Ifautilus Isevigatulus Montagu, 1803, Test. Brit. p. 188; 1808: Suppl. p. 75, t. 18, figg. 7—8. 

 Lenticulites Comptoni Nilsson, 1825, Mångriiramiga snäckor i kritformat. i Sverige; K. Vet. Ak. 



Haiidl. 1825, p. 337:^1827, Petref. svecaiui p. 7, t. 2, fig. 3. 



d'Orb., 1839, For. craie bl.; Mém. Soc. geol. Fr. 4, p. 26, t. 2, figg. -15—18. 

 Reuss, 1845, Bohm. Kreide 1, p. 34, t. 8, fig. 50 ; t. 12, fig. 25; t. 24, figsj. 



48—49. 

 Park. and Jones, 1865, N. Atl. and Aret. Oc; Phil. Traus. 1. 55. 1, p. 345, 



t. 13, fig. 19. 

 d'Orb., 1846, For. tert. Vieune, p. 103, t. 4, figg. 27 — 28. 

 Park. and Jones, 1857, For. Coast. of Norway; Ann. Mag. Nat. Hist. (2), 



19, p. 289. 

 d'Orb., 1844, Hes Canaries, p. 127, t. 3, figg. 3—4. 

 ScHWAR., 1866, For. Kar-Nikobar; Novara Reise, geol. Th. 2. 2, p. 242, 



« simplex 



» calcar 



Rob. canariensis 

 Cristell. polita 



Rob. plieata 

 Cristell. multiseptata 



Rob. negleeta 



» stellifera 



t. 6, fig. 86. 

 d'Orb., 1826, Tab. meth.; An. So. N. p. 290, N:o 23. 

 Rss., 1865, For. deutsch. Sept. Tlion; Wien. Ak. Dkschr. 1. 25. i, p. 147, 



t. 3, figg. 14—15. 

 Rss., 1851, Sept. Thon Berlin; Zeitschr. deutsch. geol. Ges. 3, p. 69, t. 4, 



fig. 27. 

 CzJZ., 1847, For. Wien. Beck.; Haid. Nat. Abh. 2. i, p. 142, t. 12, figs. 

 26—27. 

 » dimorpha, ineompta Ess., 1851, Sept. Thon v. Berlin; Zeitschr. deutsch. geol. Ges. 3, p. 67, 7u, 



figg. 23, 28. 

 Cristell. maerodisca Rss., 1862, Nordd. Hils u. Gault, Wien. Ak. Sitz.-Ber. 1. 46, p. 78, t. 9, 



fig. 5, 

 Cristell. paupereula Rss., 1865, deutsch. Sept. Thon; Wien. Ak. Dkschr. 1. 25. 1, p. 141, t. 3, 



figg. 6—7. 

 Rob. Gottingensis, nautiloides Bornem., 1854, Liasforra. Göttingen p. 43, t. 4, figg. 40 — 42. 



Rob. trigonostoma, declivis Bornem., 1855, Sept. Thon Hermsdorf; Ztschr. deutsch. geol. Ges. 7, p. 



333—336, t. 15, figg. 8—11. 



