. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 142 A. H. SCHELTEMA AND C. SCHANDER. wenia species herein described, length to mm. height to mm. width to mm (Figs. 15F. G. 19C); tapered anteriorly, mouth usually protruded w ith pair of lateral protuberances, contracted vestibule opening often distinct above mouth (hg. I5H): line of pedal groove distinct. Cuticle and epidermis: Not examined. Epidermal spicules: Similar to other two species, but longer and broader (Fig. 16. spicules 12-14; Table 21: spicules from beside pedal groove elongate, distally pointed, w
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 142 A. H. SCHELTEMA AND C. SCHANDER. wenia species herein described, length to mm. height to mm. width to mm (Figs. 15F. G. 19C); tapered anteriorly, mouth usually protruded w ith pair of lateral protuberances, contracted vestibule opening often distinct above mouth (hg. I5H): line of pedal groove distinct. Cuticle and epidermis: Not examined. Epidermal spicules: Similar to other two species, but longer and broader (Fig. 16. spicules 12-14; Table 21: spicules from beside pedal groove elongate, distally pointed, without or with slight root (spicule 3). Radula (2 examined): Teeth without distinct denticles except for the three most reccnth formed (Fig. 17E. F: measurements. Table 2). otherwise denticles appearing only as rows of slight protuberances: distal margin of den- ticle-bearing membrane scalloped except medially angular (Fig. L7F). Copulatory spicules (3 examined): As in P. sphaera, but longer and wider, and solid tip longer (Fig. ISA. D-F: Table 2): accessory copulatory spicules about 19 per bundle, short, narrow, curved but not S-shaped. nearly solid or with hol- low in central portion of spicule only, protuberances 1 to 3 (Fig. 18J: Table 2). Remarks. P. tiri^cntinensis differs more from the other two Plmvcnid species than they do from each other in 11) si/e and shape of body, (2) erectness and size of epidermal spicules. (3) morphology of radula. (4) si/e of copulatory spicules. and (?) si/e and morphology of accessory copula- lory spicules. Sinirothiellii I'ilshry. 1898 Type species. Solenopus margaritaceus Koren iV Danielssen. 1877, by subsequent designation 11981 Bull. Zool. Norn. 38, Op. 1185]. Known distribution. Between about 70 and 2000 m depth off Ireland and in Norwegian fjords. Diagnosis. Elongate, smooth: epidermal spicules skeletal, hollow. uprights either not obvious or lacking; cuticle thick, epidermis thin with stalked papillae (Odhner. 1921): radula large, wit
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
