OCR Text |
Show 1879.'] MOLLUSCA OF COSTA RICA. 483 26. ORTHALICUS ZEBRA, Mull. 0. zebra, Mull. Verm. terr. et fluv. Hist. 138; Reeve, Conch. Icon. Bulimus, pi. 15. fig. 90. Bulimus princeps, Brod. Bulimus undulatus, Brug. Bulimus zigzag, Lam. All poor and dead specimens. " Rare, in the valley about Lipurio; 200 feet above the sea in Talamanca" (Gabb). 27. CYCLOTUS BOUCARDI, Angas. Cyclotus boucardi, Angas, P. Z.S. 1878, pi. 5. figs. 3, 4. Only a single specimen found, larger than the type, measuring 2 inches across. " Mouth of Banana River, 5 miles from Limon" (Gabb). 28. CYCLOTUS IRREGULARIS, Pfr. Cyclotus irregularis, Pfr. P. Z.S. 1855, p. 117. A large number of specimens. " The commonest shell in Talamanca; coast region, and to 500 feet high on the hills" (Gabb). "Animal pinkish ; tentacles bright red" (Gabb.). There are two well-marked varieties of this species:-one large (1 in. 10 lines across), bright chestnut, with a pale band at the periphery; the other smaller (1 in. 5 lines across), pale yellowish olive, with a narrow brown band at the periphery. It is curious in how many specimens the lower margin of the peritreme appears to have been injured and repair commenced, giving the appearance of a second sinus. Of this remarkable injury, at different ages cf the shell, Mr. Bland remarks:-" Examination at the outer edge of the peristome induces m e to believe that the animal from time to time produces this injury by grazing, so to say, to satisfy a demand for lime." 29. CYCLOTUS DYSONI, Pfr. Cyclotus dysoni, Pfr. P. Z .S. 1851, p. 243. " Only on hills, not c o m m o n " (Gabb); Cervantes, Costa Rica. 30. CYCLOTUS TRANSLUCIDUS, SOW. Cyclotus translucidus, Sow.; Pfr., Monog. Pneumon. vi. vol. p. 20. Eight specimens found, all of a somewhat dwarf form as compared with the type. " Lepanta " (Gabb). 31. CYCLOPHORUS LUTESCENS, Pfr., var. Cyclophorus lutescens, Pfr. P.Z.S. 1851, p. 250; Chemn. Conch.- Cab. ed. 2, p. 333, pi. 43. figs. 12-14. Very few specimens. "Lepanta, Nicoyo" (Gabb). Curiously like Cyclophorus wahlbergi, Benson, from Zululand. 31* |