OCR Text |
Show 1894.] SLUG OF T H E GENUS JANELLA. 527 JANELLA MACULATA, sp. nov. Animal much flatter than J. bitentaculata. Dorso-median groove distinct and continuous to the tip of the tail. Groundcolour dirty yellow, with numerous irregular black spots and dashes; a large, black, oval-shaped mark immediately behind the pulmonary orifice. Head slightly lighter than the rest of the body. Foot dirty yellow, marginal portions distinct from median plane. Pulmonary orifice small and inconspicuous. Length in alcohol 33 millim. Habitat. Forty Mile Bush, North Island, New Zealand (H. Suter). The flat back of this species reminds one of Veronicella, whilst the colouring is similar to dark-coloured examples of Geomalacus maculosus, Allm., which I have occasionally seen. Anatomy. Generative System.-There is a single vestibule, from which the penis passes off as a lateral organ. In its natural position it is twisted upon itself, as shown in fig. 3. Its first portion is slightly Fig. 1. Generative system of Janella maculata. (Lettering of this and the four following figures.) alb.gl, albumen gland. b.c, buccal cavity. c, crop. h.d, hermaphrodite duct. h.gl, hermaphrodite gland. i, intestine. I, liver. w, oesophagus. ov\ free oviduct. ov, oviduct. pr, prostate. p, penis. r, rectum. r.m, retractor muscle. r.s, receptaculum seminis. st, stomach. v, vestibule. v.d, vas deferens. |