. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 254 DISCOVERY REPORTS the structure described in C. validus, Burger. During the examination of the material by means of hand sections cleared in anilin oil it was generally found that the basement membrane conformed to type, but sometimes it did not. On cutting diagonal and longi- tudinal sections an explanation, based on the contraction of the muscles of the body, was found to cover the differences. When the body is contracted the cutis is thrown into circular wrinkles between which the basemen
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 254 DISCOVERY REPORTS the structure described in C. validus, Burger. During the examination of the material by means of hand sections cleared in anilin oil it was generally found that the basement membrane conformed to type, but sometimes it did not. On cutting diagonal and longi- tudinal sections an explanation, based on the contraction of the muscles of the body, was found to cover the differences. When the body is contracted the cutis is thrown into circular wrinkles between which the basement membrane is compressed, giving the appearance of type (iii), while where the cutis bulges the type (i) cross-section occurs. No eyespots could be seen on clearing in anilin oil. In the sections, however, a series of curious organs can be observed close to the cephalic slits (Fig. 27). These are spherical bodies that produced the granular appearance of the inside of the slits in the living animal. They may possibly have visual function although they appear very similar in structure to fibrous nerve tissue. I give below a list of the stations at which specimens were Intosh. Part of a transverse captured with the serial numbers of the specimens of which sect[on of the head at the base ^ . of the cephalic slit, eg, to show special investigation was made and sections cut. As 1 have the spherical granuiar bodies, eo. remarked this species is common in the area and a large number of specimens not included in the list below were taken from King Edward Cove and also from Port Stanley Harbour, Falkland Islands, under stones at low tide. List of stations at which Lineus corrugatus was taken. The dates, positions and depths of these stations will be found in the list of stations on pp. Fig. 27. Lineus corrugatus, Mc- Station Gear No. of specimens Serial number Station Gear No. of specimens Serial number St. 39 St. 45 OTL 18 St. WS 73 OTC 6 N128 OTL 4 N 134 St. WS 77 OTC 2 N 88, N
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