| OCR Text |
Show 1906.] OF SOUTHERN INDIA AND CEYLON. 1 0 0 3 over the rhachis. The 2-3 outermost are degraded but not denticulate, though occasionally jagged. D oris e l l io t i A. & H. =Plcttydoris ellioti (A. & H.). Radula yellow. Formula about 40 x 100.0.100, but the teeth are considerably deranged. The rhachis is narrow. The innermost teeth are low ; the outermost 2-3 are degraded, and the outermost of all sometimes bears a few irregular denticulations. The remaining teeth are hamate, erect, and fairly strong. D oris stria t a Kelaart. - Platydoris striata (Kelaart). Two raduke are preserved. One is white, one yellow; both are broken. The formulae are about 40x100.0.100 and 45 x 120.0.120. The teeth are rather slender, not much bent, and increase from the inside. The innermost are not markedly smaller, but are distinguished by their position on the rhachis. The outermost present suggestions of faint irregular denticulation, which, however, cannot be seen anywhere with certainty. The dentition supports the idea that this species is a variety of Plat, cruenta (= arrogans) without the red markings; but see my previous paper, p. 647, for the genitalia, and Bergh, Siboga,. p. 139, for PI. flammulata. D oris picta Kelaart. ? = PIatydoris picta (Kelaart). A large radula, but hidden by the thick medium in which it is mounted. In consists of about 40 rows containing on each side of a narrow rhachis 100 or more small, thin, crowded hamate teeth. The outermost cannot be seen plainly, but do not appear to be denticulate or much degraded. This form is probably referable to Platydoris, but the genitalia are unknown. D oris e x a n th em a t a Kelaart. ? = Asteronotus hemprichi Ehrenberg. One large radula, brownish in front but otherwise white, badly mounted in a gummy fluid. Formula about 35 x 55.0.55, but several rows are imperfect. The teeth are thin, distinctly hamate, and increase consistently uj) to the end of the rows, where the last 2-3 become degraded but not denticulate. The innermost, and to some extent the second teeth, project into the broad rhachis almost at light angles to the rest. This dentition is compatible with the view that J). exanthemata is Asteronotus hemprichi, but Kelaart's energetic language about the ugliness of the animal makes it probable that he had before him if not a distinct species at least a well-marked variety. |
